> ## Content Index > Fetch the complete content index at: https://a9droid.com/llms.txt > Use this file to discover other available public pages before exploring further. # Best Power Supply for 3080: MSI MAG A850GL Leads - URL: https://a9droid.com/best-power-supply-3080/ - Published: 2026-09-07T06:31:37.000Z - Updated: 2026-09-07T09:49:14.000Z - Description: One 850W ATX unit for RTX 3080 builds, plus five OptiPlex 3080 desktop bricks. Which '3080' you own decides everything, and the numbers here spell it out. - Author: Samuel Harris - Tags: Computers & Networking, #PC Hardware, Power Supplies The best power supply for 3080 depends on which "3080" you mean: for an NVIDIA RTX 3080 graphics card in a tower, the MSI MAG A850GL PCIE5 leads at 850W with an 80 Plus Gold rating and a 10-year warranty. For the far more common Dell OptiPlex 3080 Micro desktop, the IBATTS 90W adapter wins on model coverage and its 18-month exchange. Pick by which 3080 sits on your desk. In this guide 1. [Best power supply for 3080 at a glance](#best-power-supply-for-3080-at-a-glance) 2. [Which 3080 do you actually own?](#which-3080-do-you-actually-own) 3. [How I screened this shortlist](#how-i-screened-this-shortlist) 4. [1\. IBATTS 90W AC Adapter for Dell OptiPlex Micro 9020 7010 — Best overall](#1-ibatts-90w-ac-adapter-for-dell-optiplex-micro-9020-7010-%E2%80%94-best-overall) 5. [2\. BIYTC 90W 4.5mm AC Adapter for Dell Optiplex 7050 3070 — Best budget pick](#2-biytc-90w-45mm-ac-adapter-for-dell-optiplex-7050-3070-%E2%80%94-best-budget-pick) 6. [3\. Lxun Upgrad 200W L200EBS-01 Power Supply 5TVM5 PSU — Best upgrade](#3-lxun-upgrad-200w-l200ebs-01-power-supply-5tvm5-psu-%E2%80%94-best-upgrade) 7. [4\. Verful 90W AC Adapter for Dell Optiplex Micro Desktop — Best minimal setup](#4-verful-90w-ac-adapter-for-dell-optiplex-micro-desktop-%E2%80%94-best-minimal-setup) 8. [5\. EazyU 65W Charger for Dell OptiPlex 3090 3080 3070 3060 — Best for pros](#5-eazyu-65w-charger-for-dell-optiplex-3090-3080-3070-3060-%E2%80%94-best-for-pros) 9. [6\. MSI MAG A850GL PCIE5 — Best premium](#6-msi-mag-a850gl-pcie5-%E2%80%94-best-premium) 10. [What an RTX 3080 really pulls from the wall](#what-an-rtx-3080-really-pulls-from-the-wall) 11. [How do I tell a genuine Dell brick from a knockoff?](#how-do-i-tell-a-genuine-dell-brick-from-a-knockoff) 12. [Does wattage headroom actually matter?](#does-wattage-headroom-actually-matter) 13. [What the listings do not tell you](#what-the-listings-do-not-tell-you) 14. [The verdict](#the-verdict) 15. [FAQ](#faq) ## Best power supply for 3080 at a glance | Pick | Wattage | Form factor | Price | | ---------------------------------------------------------------------------------------------------------------------------------- | ------- | ----------------- | ------------------------------------------------------------------ | | **Best overall**[IBATTS 90W AC Adapter for Dell OptiPlex Micro 9020 7010](https://www.amazon.com/dp/B0B2HXR9CC?tag=a9droid-20) | 90W | External brick | [Check Price](https://www.amazon.com/dp/B0B2HXR9CC?tag=a9droid-20) | | **Best budget pick**[BIYTC 90W 4.5mm AC Adapter for Dell Optiplex 7050 3070](https://www.amazon.com/dp/B0D185VB3Y?tag=a9droid-20) | 90W | External brick | [Check Price](https://www.amazon.com/dp/B0D185VB3Y?tag=a9droid-20) | | **Best upgrade**[Lxun Upgrad 200W L200EBS-01 Power Supply 5TVM5 PSU](https://www.amazon.com/dp/B0FZ82DKXT?tag=a9droid-20) | 200W | Internal SFF unit | [Check Price](https://www.amazon.com/dp/B0FZ82DKXT?tag=a9droid-20) | | **Best minimal setup**[Verful 90W AC Adapter for Dell Optiplex Micro Desktop](https://www.amazon.com/dp/B0CLKD3N2G?tag=a9droid-20) | 90W | External brick | [Check Price](https://www.amazon.com/dp/B0CLKD3N2G?tag=a9droid-20) | | **Best for pros**[EazyU 65W Charger for Dell OptiPlex 3090 3080 3070 3060](https://www.amazon.com/dp/B0D7DJZ67W?tag=a9droid-20) | 65W | External brick | [Check Price](https://www.amazon.com/dp/B0D7DJZ67W?tag=a9droid-20) | | **Best premium**[MSI MAG A850GL PCIE5](https://www.amazon.com/dp/B0CB9MSJ5N?tag=a9droid-20) | 850W | ATX tower PSU | [Check Price](https://www.amazon.com/dp/B0CB9MSJ5N?tag=a9droid-20) | ## Which 3080 do you actually own? The phrase best power supply for 3080 hides a fork in the road, and picking the wrong branch wastes the whole purchase. The number 3080 appears on two entirely different products a shopper might have on the desk: - **Dell OptiPlex 3080**, a business desktop family. The Micro variant runs off a 90W external brick with a barrel jack. The small form factor tower uses an internal 200W unit with Dell's proprietary connector. - **NVIDIA GeForce RTX 3080**, a graphics card that slots into a full-size gaming tower and pulls hundreds of watts through PCIe cables from an internal ATX power supply. Five of the six picks here are Dell OptiPlex 3080 replacements. One, the MSI MAG A850GL, is an ATX unit for a tower running the RTX 3080 card. They are not substitutes for each other. Read the sticker on your existing supply, or the ports on the back of your machine, before you order anything. The rest of this guide splits along that line. If the "3080" you care about is a Dell desktop, skip past the MSI. If it is a graphics card, only the MSI is relevant, and the section on wattage headroom is written for you. ## How I screened this shortlist I lined up every listing that named "3080" in its compatibility text and worked through the published specifications side by side. Three cuts did most of the work. 1. **Confirmed 3080 compatibility in the listing.** Every one of the six names OptiPlex 3080 or the RTX 3080 use case in its own text. 2. **A published warranty.** Five of the six carry a stated warranty term; the sixth, the Lxun 200W unit, lists a one-year manufactured warranty. Nothing here ships without recourse. 3. **A stated wattage and connector.** Vague "universal" adapters were cut. Every Dell brick here calls its output and its tip size; the MSI names 850W and its ATX 3.1 spec. That left five Dell OptiPlex 3080 supplies at three power levels (65W, 90W, 200W) and one ATX PSU for graphics-card builds. The 90W bracket is where four of the six sit, because the OptiPlex Micro is the far more common 3080 machine. ## 1\. IBATTS 90W AC Adapter for Dell OptiPlex Micro 9020 7010 — Best overall **The IBATTS 90W is the safest OptiPlex 3080 Micro pick because it ships two barrel tips and carries the longest exchange window in the set.** [![IBATTS 90W AC Adapter with two barrel tips for Dell OptiPlex Micro — showing the dual-tip fit kit that no other brick here matches](https://m.media-amazon.com/images/I/41pyZLvPyrL._SL500_.jpg)](https://www.amazon.com/dp/B0B2HXR9CC?tag=a9droid-20) **Best for:** OptiPlex Micro 3080 owners who want the widest model coverage **Skip it if:** you have an RTX 3080 graphics card in a tower Two things separate this adapter from the other 90W bricks. The listing states two connector sizes, 4.5x3.0mm and 7.4x5.0mm, so it fits both the current OptiPlex Micro barrel and Dell's older 7.4mm plug. Every other 90W adapter in this set ships a single 4.5mm tip. If you run a mixed fleet, one IBATTS covers both eras. Second, the 18-month exchange window is the longest stated warranty among the four 90W picks. BIYTC gives 360 days, Verful 12 months, EazyU one year. The unit weighs 0.82 lb, which is average for a 90W brick, and IBATTS says it holds CE, RoHS, FC and UL safety marks. The trade-off is that this is the third-cheapest of the six, not the cheapest, and the sales rank tells you it is the one buyers of Dell adapters choose most often here. You pay a small premium in exchange for the dual-tip fit kit and the longer exchange window. **Pros:** - Two barrel tips cover 4.5mm and 7.4mm Dell plugs - 18-month exchange, longest in this set - Widest published OptiPlex model compatibility list - Four safety marks named on the listing - The most-picked Dell adapter in this shortlist **Cons:** - Only 90W, not enough for the SFF tower - Third-cheapest here, not the entry-tier price - No stated cable length in the listing - Wrong product entirely for an RTX 3080 GPU build [Check Price on Amazon](https://www.amazon.com/dp/B0B2HXR9CC?tag=a9droid-20) ## 2\. BIYTC 90W 4.5mm AC Adapter for Dell Optiplex 7050 3070 — Best budget pick **The BIYTC is the cheapest of the six and covers the OptiPlex 3080 Micro on a 4.5mm barrel, which is all most owners actually need.** [![BIYTC 90W 4.5mm AC adapter alongside its power cord — the entry-tier OptiPlex Micro replacement](https://m.media-amazon.com/images/I/41FQ6wBYMjL._SL500_.jpg)](https://www.amazon.com/dp/B0D185VB3Y?tag=a9droid-20) **Best for:** a spare OptiPlex Micro brick kept in a drawer **Skip it if:** you need more than a year of warranty cover If you already know your OptiPlex 3080 Micro uses the 4.5x3.0mm tip and you just want a working replacement, BIYTC is the cheapest of the six picks here. The listing states 19.5V, 3.33A/4.62A output supporting fast charging, an AC input of 100-240V, 50-60Hz, and a 4.5x3.0mm connector. The compatibility line covers OptiPlex 3080, 7050, 3070, 3050, 7020, 9020 and the rest of the Micro range. The warranty is 360 days, the shortest stated here, which is the honest trade-off for the lowest price position. BIYTC also does not publish a weight or a cable length. If the brick is going to live behind a monitor and stay there, none of that matters. If you want an adapter that follows a laptop bag around for years, the IBATTS is the sturdier bet. Only one seller lists this model, so if it goes out of stock the alternative is another vendor's brick, not this exact SKU. **Pros:** - The cheapest of the six - Named OptiPlex 3080 compatibility in the listing - 19.5V output matches Dell's spec - Fast-charging output claim from the manufacturer **Cons:** - 360-day warranty, shortest in this set - No weight or cable length published - Only one seller listed - Single 4.5mm tip, no adapter for older Dell plugs [Check Price on Amazon](https://www.amazon.com/dp/B0D185VB3Y?tag=a9droid-20) ## 3\. Lxun Upgrad 200W L200EBS-01 Power Supply 5TVM5 PSU — Best upgrade **The Lxun 200W is not a brick at all: it is an internal replacement for the OptiPlex 3080 small form factor tower, not the Micro.** [![Lxun 200W L200EBS-01 internal PSU for Dell OptiPlex SFF — the drop-in unit for OptiPlex 3080 SFF towers, distinct from the Micro brick](https://m.media-amazon.com/images/I/41jJ3RA8++L._SL500_.jpg)](https://www.amazon.com/dp/B0FZ82DKXT?tag=a9droid-20) **Best for:** OptiPlex 3080 small form factor towers, not the Micro **Skip it if:** your 3080 desktop is the Micro model with a barrel jack This is the pick that catches people out. The OptiPlex 3080 comes in more than one form factor, and the small form factor version does not use an external brick. It runs an internal 200W supply, part number L200EBS-01 or H200EBS-01, with Dell's proprietary connector and mounting layout. That is what the Lxun unit replaces. Dimensions are 2.48 x 4.72 x 3.15 in and weight is 1 lb. Input is 100-240V, 50-60Hz, and Lxun lists a 1-year manufactured warranty. The replaceable part number list covers 05TVM5, 5TVM5, KMJP5 and VFXXF, which matches the stickers on Dell's own units. This is the most expensive of the five Dell picks in the set and sits in the premium price position for exactly one reason: it is the only unit here that fits an SFF tower. Buy it only after you have opened the case and confirmed the part number on the existing PSU. If your machine is the OptiPlex Micro, this unit is the wrong shape and the wrong connector. **Pros:** - Only pick in the set that fits the OptiPlex 3080 SFF - Named part number match to Dell's L200EBS-01 - Compact 2.48 x 4.72 x 3.15 in footprint - 1-year manufactured warranty **Cons:** - Second-most expensive Dell pick here - Not compatible with OptiPlex 3080 Micro - Only one seller listed - No 80 Plus efficiency rating published [Check Price on Amazon](https://www.amazon.com/dp/B0FZ82DKXT?tag=a9droid-20) ## 4\. Verful 90W AC Adapter for Dell Optiplex Micro Desktop — Best minimal setup **Verful is a straightforward one-tip, one-brick 90W replacement for the OptiPlex 3080 Micro at the second-lowest price in the set.** [![Verful 90W black AC adapter with attached DC cable — the single-tip OptiPlex Micro replacement in matte black](https://m.media-amazon.com/images/I/41rRdovas-L._SL500_.jpg)](https://www.amazon.com/dp/B0CLKD3N2G?tag=a9droid-20) **Best for:** a tidy replacement brick for a single OptiPlex 3080 Micro **Skip it if:** you own several Dell tip sizes and want one adapter to cover them Verful publishes the same 19.5V, 4.62A, 90W output as the other Micro bricks here, along with fast-charging compatibility at 65W and 45W. The listing calls out OptiPlex 3080 in the Micro MFF compatibility string, alongside the rest of the 3000, 5000, 7000 and 9000 Micro range. The colour is black, which does not sound like a feature until you notice that no other 90W pick here bothers to publish it. Warranty is 12 months, which sits between BIYTC's 360 days and IBATTS's 18 months. Verful lists a single 4.5mm tip only, so if your existing plug is the older 7.4mm Dell style, this one does not fit and IBATTS does. The Verful sits second-cheapest in the set, only slightly above the BIYTC, and the sales rank puts it in the middle of the pack for buyer interest among the OptiPlex bricks. Straightforward is the pitch, and straightforward is what it delivers. **Pros:** - Second-cheapest of the six - 12-month warranty, longer than the BIYTC - Fast-charging support at 90W, 65W and 45W claimed - Named OptiPlex 3080 Micro compatibility **Cons:** - Single 4.5mm tip only - Only one seller listed - No weight or cable length in the listing - Nothing here that IBATTS does not also do [Check Price on Amazon](https://www.amazon.com/dp/B0CLKD3N2G?tag=a9droid-20) ## 5\. EazyU 65W Charger for Dell OptiPlex 3090 3080 3070 3060 — Best for pros **The EazyU is a 65W brick, not 90W, and it suits owners who know their OptiPlex 3080 Micro configuration runs comfortably on the lower supply.** [![EazyU 65W charger for Dell OptiPlex with power cord — the lower-wattage option for OptiPlex 3080 Micro](https://m.media-amazon.com/images/I/41yRS9E6B3L._SL500_.jpg)](https://www.amazon.com/dp/B0D7DJZ67W?tag=a9droid-20) **Best for:** OptiPlex 3080 Micro users who run a lower-wattage config **Skip it if:** your desktop demands the full 90W supply EazyU is the odd one out among the four bricks. It rates at 65W (19.5V, 3.34A), not the 90W the other three deliver. Dell has shipped OptiPlex Micros with both 65W and 90W adapters depending on the CPU and storage configuration, and the sticker on your existing supply tells you which you need. If yours reads 65W, EazyU is a direct like-for-like. If yours reads 90W, one of the higher-wattage picks is the right call, because a 65W brick under a 90W-configured system can throttle or refuse to boot on cold power-on. The listing names OptiPlex 3080, 3090, 3070, 3060, 3050 and older 9020M and 3020M models in the compatibility list. Warranty is one year, colour is black, and the model number is AD195334\. The sales rank is the highest here, meaning it is the slowest seller of the six, which fits: fewer buyers land on the 65W bracket by default. **Pros:** - Correct wattage for 65W-rated OptiPlex 3080 Micros - Named part number match to Dell 19.5V, 3.34A - 1-year warranty - Compatibility list covers older 9020M and 3020M too **Cons:** - Wrong wattage if your Dell shipped with a 90W brick - Slowest seller of the six - No published weight or dimensions - Only one seller listed [Check Price on Amazon](https://www.amazon.com/dp/B0D7DJZ67W?tag=a9droid-20) ## 6\. MSI MAG A850GL PCIE5 — Best premium **The MSI MAG A850GL is the only pick here for an RTX 3080 graphics card build, and its 850W, ATX 3.1, PCIe 5.1 spec is built for exactly that job.** [![MSI MAG A850GL PCIE5 fully modular 850W ATX power supply — the tower PSU sized for RTX 3080 gaming builds](https://m.media-amazon.com/images/I/41gfaoqyuML._SL500_.jpg)](https://www.amazon.com/dp/B0CB9MSJ5N?tag=a9droid-20) **Best for:** a gaming tower running an NVIDIA RTX 3080 graphics card **Skip it if:** you meant a Dell OptiPlex 3080 desktop, not the GPU If your 3080 is a graphics card, this is the only pick in the set that goes in your machine. The MSI MAG A850GL is a full ATX unit at 850W, 80 Plus Gold certified, fully modular, and rated to ATX 3.1 and PCIe 5.1\. Dimensions are 4.92 x 12 x 8.75 in, which is standard ATX depth. MSI ships a native dual-colour 12V-2x6 cable, so the newer 16-pin GPU connector is on the box rather than an adapter dongle. The warranty is a 10-year limited manufacturer term, longer than every other product in this set combined. The 850W figure gives an RTX 3080 build meaningful headroom. NVIDIA lists 750W as the recommended system power for a stock RTX 3080\. At 850W you have a margin for a mid-range CPU, storage, fans and the transient spikes that a 3080 pulls under load. This is the most expensive pick here, and it is the most expensive by a wide margin, because you are buying an entire internal PSU rather than an external brick. **Pros:** - 850W with 80 Plus Gold efficiency - ATX 3.1 and PCIe 5.1 ready - Fully modular cabling - Native 12V-2x6 cable, no adapter needed - 10-year limited manufacturer warranty **Cons:** - The most expensive pick in the set - Wrong product entirely for a Dell OptiPlex 3080 - 12 in depth may crowd small ATX cases - Overkill wattage for anything below an RTX 3080 [Check Price on Amazon](https://www.amazon.com/dp/B0CB9MSJ5N?tag=a9droid-20) ## What an RTX 3080 really pulls from the wall If you landed on the best power supply for 3080 question with a graphics card in mind, the numbers matter. NVIDIA's own recommendation for a system with an RTX 3080 is 750W. The card itself has a board power rating in the region of 320W, and transient spikes above the sustained figure are well documented. That is why 850W is the sensible floor rather than 750W: you leave headroom for the CPU, the drives, the fans, and the brief current bursts that undersized supplies handle badly. The MSI MAG A850GL sits at 850W with 80 Plus Gold efficiency, which means it wastes less power as heat at typical loads. ATX 3.1 and PCIe 5.1 are the current standards for handling those transients, and the native 12V-2x6 cable is what the newer GPU connector expects. None of the other five picks are relevant to this scenario; they are all Dell OptiPlex desktop supplies. ## How do I tell a genuine Dell brick from a knockoff? Every Dell OptiPlex adapter in this shortlist is a third-party replacement, not an OEM Dell unit. That is normal for the aftermarket, and it is why the specifications on the sticker matter more than the brand on the front. Check three things on any replacement: 1. **Voltage and amperage match.** The Dell Micro range wants 19.5V. Amperage depends on wattage: 3.34A for 65W, 4.62A for 90W. 2. **Barrel tip diameter.** Newer OptiPlex Micros use 4.5x3.0mm. Older units used 7.4x5.0mm. Only the IBATTS in this set ships both. 3. **Safety marks and warranty.** UL, CE, FC and RoHS are the ones to look for. A stated warranty term is what turns a cheap brick into a returnable one. Do not assume the compatibility list in a listing is exhaustive. The part numbers on your existing brick are the real answer. ## Does wattage headroom actually matter? For the Dell OptiPlex 3080 Micro, matching wattage matters more than headroom does. A 90W-rated system on a 65W brick may boot, throttle, or refuse to power on when the SSD and CPU pull peak current together. A 65W-rated system on a 90W brick is fine: the desktop only draws what it needs. For an RTX 3080 graphics card build, headroom matters and here is why. Modern GPUs pull short, sharp current spikes well above their sustained rating. A power supply sized right at the sustained figure can trip its protection circuit on a spike, which reads as a random shutdown to the user. Sizing 100W above NVIDIA's recommended figure, as the 850W MSI does against a 750W recommendation, is what stops that. That is the deciding criterion for tower builds. Not raw wattage, but sustained wattage plus enough headroom for the transients. ## What the listings do not tell you Three gaps in the published data are worth naming, because a listing is not going to volunteer any of them. - **Cable length.** None of the four Dell 90W adapter listings publish a cable length. If your outlet is more than a few feet from the desk, budget for an extension. - **Coil whine.** No power supply listing anywhere volunteers this. Some units hum audibly at certain loads; you find out when it arrives. - **Exact plug polarity.** All the Dell units here are centre-positive at 19.5V, but the listings assume you know that. If you are replacing a supply from a different brand, verify with a multimeter before plugging in. The other quiet gap: only two of the six listings have more than one seller. If a single-seller unit goes out of stock, the exact SKU is gone and you are shopping again from scratch. ## The verdict The best power supply for 3080 splits cleanly along the two products the phrase can mean. If your 3080 is a Dell OptiPlex 3080 Micro desktop, the IBATTS 90W adapter is the winner because it ships both the 4.5mm and 7.4mm barrel tips, holds four named safety marks, and carries an 18-month exchange window that beats every other Dell brick in this set. It is the one buyers of Dell adapters here choose most often, and the reasons are on the spec sheet. If your OptiPlex 3080 is the small form factor tower rather than the Micro, only the Lxun 200W L200EBS-01 fits, because the SFF uses an internal unit with Dell's proprietary layout and no barrel jack exists on the case. If your 3080 is the NVIDIA RTX 3080 graphics card, the MSI MAG A850GL PCIE5 is the correct answer: 850W, 80 Plus Gold, ATX 3.1, and a 10-year warranty give you the headroom the card's transient spikes actually need. Read the sticker on the current supply, or the connector on the machine, before you click buy. ## FAQ ### Is the MSI MAG A850GL enough power for an RTX 3080? Is the MSI MAG A850GL enough for an RTX 3080? Yes, comfortably. NVIDIA recommends 750W of system power for an RTX 3080 build, and the MSI supplies 850W with 80 Plus Gold efficiency. That 100W margin absorbs the transient current spikes that RTX 3080 cards are known for. The ATX 3.1 and PCIe 5.1 ratings and the native 12V-2x6 cable are built for exactly this connector. ### Will a 65W charger work on a Dell OptiPlex 3080 Micro that shipped with 90W? Will a 65W charger work on a 90W-rated OptiPlex? Not reliably. Dell ships the OptiPlex 3080 Micro with either a 65W or a 90W adapter depending on the CPU and storage configuration. Undersupplying a 90W-rated unit with a 65W brick can cause boot failures, throttling, or shutdowns under load. Check the wattage printed on the original brick before ordering the EazyU 65W. ### IBATTS vs BIYTC: which 90W Dell adapter should I pick? IBATTS vs BIYTC comes down to fit kit and warranty. The IBATTS ships two barrel tips, 4.5x3.0mm and 7.4x5.0mm, and carries an 18-month exchange window. The BIYTC is cheaper, but ships a single 4.5mm tip and a 360-day warranty. Pick BIYTC if you know your Dell uses the 4.5mm barrel and price leads. Pick IBATTS if you want the longer warranty or a spare tip. ### Is a power supply for an OptiPlex 3080 Micro worth buying third-party? Is a third-party OptiPlex 3080 adapter worth buying? For a home or small-office desktop, yes. Every pick here publishes matching voltage and amperage, a stated warranty term, and safety certifications. What you lose over an OEM Dell brick is the Dell logo and often several dollars. What you keep is a working, returnable adapter with the same 19.5V output the machine expects. ### Does the OptiPlex 3080 come in different form factors that need different supplies? Does the OptiPlex 3080 come in different form factors? Yes, and the power supply differs by form factor. The Micro (MFF) uses an external 90W or 65W brick with a barrel jack. The small form factor tower uses an internal 200W unit like the Lxun L200EBS-01\. You cannot substitute one for the other. Confirm which chassis you have before ordering, ideally from the service tag or the case label. The single most useful step before you order any of these is to walk over to the desktop, unplug the existing supply, and read the sticker on it. Note the voltage, the amperage, the wattage and the barrel size if it is a brick. Note the part number if it is internal. That gives you the two or three fields that separate the winner from the wrong purchase. For RTX 3080 graphics-card builds, the MSI MAG A850GL is the default because 850W of ATX 3.1 headroom leaves the card room to spike without tripping the supply. For OptiPlex 3080 Micros, IBATTS covers more machines than any other pick here. *Last updated: September 21, 2026\. Product availability re-checked.* *This page contains affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.*