The 7 Best Power Supplies for RTX 2080 and RTX 2080 Ti in 2026
Marcus Chen, PC Hardware Editor · Updated August 2026
Introduction
The RTX 2080 and RTX 2080 Ti are power-hungry cards by any standard — NVIDIA rates the 2080 at 215W TDP and the 2080 Ti at 250W TDP, and factory-overclocked AIB versions of the Ti can pull noticeably more than that under a heavy load spike. Pair either GPU with a weak, aging, or non-modular power supply and you're not just risking poor stability — you're risking random shutdowns, coil whine, and in worst cases a PSU that takes other components down with it when it fails. A 2080 Ti power supply needs enough continuous wattage, the right PCIe connector count, and enough transient headroom to absorb the millisecond power spikes these GPUs are known for.
We compared seven power supplies in the 650W-850W range that are specifically well-suited to RTX 2080 and RTX 2080 Ti systems, weighing rated wattage against realistic system draw, 80 PLUS efficiency certification, connector layout, modular cabling, and price. Every unit here comes from a brand with a track record of stable voltage regulation and honest wattage labeling — because with a card that draws 250W at the die, an underrated or bargain-bin PSU is not the place to cut corners. Whether you're building fresh around a 2080 Ti and a high-end CPU or upgrading the PSU in an existing 2080 rig, this guide gets you to the right wattage and connector combination fast.
At a Glance: Best PSUs for RTX 2080 / 2080 Ti
| PSU | Wattage | Efficiency Rating | Modular? | PCIe Connectors | Price |
|---|---|---|---|---|---|
| Corsair RM850x | 850W | 80 PLUS Gold | Fully Modular | 4x 6+2-pin (8-pin) | ~$139.99 |
| EVGA SuperNOVA 850 GA | 850W | 80 PLUS Gold | Fully Modular | 4x 6+2-pin (8-pin) | ~$149.99 |
| Seasonic Focus GX-750 | 750W | 80 PLUS Gold | Fully Modular | 4x 6+2-pin (8-pin) | ~$99.99 |
| be quiet! Straight Power 11 750W | 750W | 80 PLUS Gold | Fully Modular | 4x 6+2-pin (8-pin) | ~$129.99 |
| Corsair RM750x | 750W | 80 PLUS Gold | Fully Modular | 4x 6+2-pin (8-pin) | ~$109.99 |
| Cooler Master MWE Gold 750 V2 | 750W | 80 PLUS Gold | Semi-Modular | 2x 6+2-pin (8-pin) | ~$89.99 |
| Corsair RM650x | 650W | 80 PLUS Gold | Fully Modular | 2x 6+2-pin (8-pin) | ~$99.99 |
Table of Contents
Types of Power Supplies for High-TDP GPUs
Not every 750W PSU is built the same way, and with a card pulling 215-250W at the die, the differences actually matter. Here's what to know before you pick one.
Wattage Sizing for High-TDP GPUs
NVIDIA's official recommendation for the RTX 2080 is a 650W PSU minimum, and for the RTX 2080 Ti it's 650-700W depending on the card partner. In practice, we recommend sizing higher than the minimum: a 650W unit is fine for a 2080 paired with a mid-range CPU, but a 2080 Ti paired with a high-core-count CPU like a Ryzen 9 3900X or 3950X pushes combined system draw close enough to 650W that you lose all headroom for spikes, overclocking, or future upgrades. 750W is the sweet spot for most 2080/2080 Ti builds, and 850W gives you real breathing room if you're running an overclocked Ti alongside a 12+ core CPU.
Single vs. Dual 8-Pin PCIe Requirements
Reference-design RTX 2080 cards typically need a single 8-pin PCIe connector, while the RTX 2080 Ti — especially Founders Edition and factory-overclocked AIB cards — almost always requires two 8-pin PCIe connectors. Always check your specific card's connector requirement before buying a PSU, and make sure the PSU has at least that many native PCIe cables (not just spare 6-pin-to-8-pin adapters, which are a common cause of intermittent power issues under load). Every PSU on this list has at least two 8-pin PCIe connectors, and the 750W-850W units have four, which also leaves room for a second GPU or a high-draw peripheral down the line.
Transient Spike Headroom
This is the piece budget PSUs get wrong most often. Modern high-TDP GPUs — including the RTX 2080 Ti — don't draw power in a flat line; they spike well above their rated TDP for microseconds at a time during load transitions. A 2080 Ti rated at 250W TDP can transient-spike to 350W+ for a few milliseconds. A well-built PSU with tight voltage regulation and enough capacitor headroom absorbs these spikes without tripping its over-power protection (OPP) or sagging voltage. A cheap, loosely-regulated unit running near its rated capacity can shut down or destabilize the system on a spike it should never have noticed. This is the single biggest reason we favor 80 PLUS Gold-or-better units with a strong single 12V rail over the cheapest wattage-matched PSU you can find.
80 PLUS Efficiency Certification
80 PLUS Gold is the practical floor we recommend for a 2080/2080 Ti build — it guarantees at least 87-90% efficiency at typical loads, which means less wasted heat, quieter fan curves, and lower electricity draw than a Bronze unit at the same wattage. Platinum and Titanium units exist and squeeze out another few percentage points of efficiency, but the price premium rarely pays for itself for a single-GPU gaming build; Gold is where the value curve flattens out.
Our 7 Top Picks
Corsair RM850x
Best OverallThe RM850x is our top overall pick for RTX 2080 and 2080 Ti builds because it removes wattage anxiety entirely. At 850W and 80 PLUS Gold certified, it comfortably handles a 2080 Ti plus a high-end 12-16 core CPU with real headroom left over for transient spikes and future upgrades. It uses a 105°C-rated Japanese capacitor design and a fully modular cable set, so you only plug in what your build needs, and the fan runs in zero-RPM mode at idle and light load — meaning it's completely silent during desktop use and light gaming. Build quality here is genuinely excellent for the price point, with tight voltage regulation across all rails and a 10-year warranty backing it up.
Pros
- Pros:
- 850W gives serious headroom for a 2080 Ti + high-end CPU combo
- Fully modular with flat, easy-to-route cables
- Zero-RPM fan mode for silent idle/light-load operation
- 10-year warranty
- Excellent transient response for spike-prone GPUs
Cons
- Cons:
- More wattage than a single-GPU 2080 (non-Ti) build strictly needs
- Priced above the 750W units on this list
Bottom Line: If you want zero wattage anxiety with a 2080 Ti and a high-end CPU, the RM850x is the safest buy on this list.
Editor's Rating: 4.8/5
EVGA SuperNOVA 850 GA
Best for ATX 3.0 Future-ProofingThe SuperNOVA 850 GA is our pick for builders who want their PSU to outlast this GPU generation. It's built on a Fully Modular ATX 3.0-ready platform with the extra transient response margin ATX 3.0's spec calls for, so it handles the RTX 2080 Ti's power spikes with room to spare and stays relevant if you upgrade to a newer GPU with tighter power-delivery specs down the line. At 850W and 80 PLUS Gold, it pairs comfortably with a 2080 Ti and any current high-end CPU, and EVGA backs it with a 10-year warranty and ECO thermal control mode for near-silent low-load operation.
Pros
- Pros:
- ATX 3.0 design tuned for GPU transient spikes
- 850W headroom for high-end CPU + 2080 Ti pairings
- Fully modular, flat cables
- ECO mode for silent operation under light load
- 10-year warranty
Cons
- Cons:
- Slightly pricier than the Corsair RM850x
- ATX 3.0 12VHPWR connector isn't needed by the 2080/2080 Ti's standard 8-pin connectors
Bottom Line: The best choice if you want a 2080 Ti PSU that's also ready for your next GPU upgrade.
Editor's Rating: 4.7/5
Seasonic Focus GX-750
Best ValueSeasonic built its reputation on OEM manufacturing for other "premium" PSU brands, and the Focus GX-750 is where that engineering shows up at a genuinely fair price. At 750W and 80 PLUS Gold, it's correctly sized for both the RTX 2080 and 2080 Ti, with four 8-pin PCIe connectors and a fully modular layout. What sets it apart is a 12-year warranty — among the longest in the industry — which tells you how confident Seasonic is in its own capacitor quality and voltage regulation. Fan control is smooth and the unit stays quiet even under sustained gaming loads, making it an easy recommendation for anyone who wants premium reliability without paying a premium price.
Pros
- Pros:
- 750W is correctly sized for either GPU
- Industry-leading 12-year warranty
- Fully modular with four 8-pin PCIe connectors
- Quiet fan curve under load
- Excellent price-to-quality ratio
Cons
- Cons:
- No zero-RPM fan-off mode at idle
- Less headroom than the 850W options for a Ti + high-end CPU combo
Bottom Line: The best combination of price, warranty, and build quality for a straightforward 2080/2080 Ti build.
Editor's Rating: 4.6/5
be quiet! Straight Power 11 750W
Best for Quiet Buildsbe quiet! built its name on acoustics, and the Straight Power 11 750W lives up to it. It uses the brand's Silent Wings fan with a rifle bearing designed specifically to stay quiet under sustained load — a real difference-maker if your case sits on or near your desk during long gaming sessions with a 2080 Ti drawing near-full power. Beyond acoustics, it's a legitimately strong performer: 80 PLUS Gold efficiency, fully modular cabling, four 8-pin PCIe connectors, and Japanese capacitors rated for long-term durability. Voltage regulation is tight across all rails, which matters for a card known for transient spikes.
Pros
- Pros:
- Quietest fan of any PSU on this list under sustained gaming load
- 750W correctly sized for 2080/2080 Ti builds
- Fully modular with four 8-pin PCIe connectors
- Tight voltage regulation, Japanese capacitors
- 5-year warranty
Cons
- Cons:
- Shorter warranty than Corsair, EVGA, or Seasonic's units here
- Priced above the Cooler Master and Corsair RM750x at similar wattage
Bottom Line: The right pick if a quiet build matters as much to you as raw specs.
Editor's Rating: 4.6/5
Corsair RM750x
Best Balanced 750W PickThe RM750x is essentially the RM850x's sibling at a lower wattage tier and a lower price, and for most single-GPU RTX 2080/2080 Ti builds it's genuinely all the PSU you need. It shares the same zero-RPM fan mode, fully modular flat cable design, and 105°C Japanese capacitors as its bigger sibling, just scaled to 750W. Four 8-pin PCIe connectors comfortably cover dual-8-pin RTX 2080 Ti cards, and the 10-year warranty matches Corsair's higher-end units. If you're not planning to pair your Ti with a top-tier 16-core CPU, this is the more budget-sensible choice over the 850W model without giving up build quality.
Pros
- Pros:
- 750W is right-sized for most 2080/2080 Ti single-GPU builds
- Zero-RPM silent fan mode
- Fully modular, four 8-pin PCIe connectors
- 10-year warranty
- Same build quality as the pricier RM850x
Cons
- Cons:
- Less headroom than 850W units for a Ti + high-end CPU pairing
- No zero-RPM mode under sustained heavy gaming (fan spins up as expected)
Bottom Line: The best balance of price and headroom for a standard single-GPU 2080/2080 Ti build.
Editor's Rating: 4.6/5
Cooler Master MWE Gold 750 V2
Best Budget PickIf you want 80 PLUS Gold efficiency and a properly sized 750W rating without paying premium-brand prices, the MWE Gold 750 V2 is the best budget option we found. It's semi-modular rather than fully modular — the 24-pin and CPU cables are permanently attached — which keeps cost down but means slightly more cable clutter than the fully modular units above. It ships with two native 8-pin PCIe connectors, which covers a dual-8-pin RTX 2080 Ti without adapters, and its DC-to-DC design keeps voltage regulation solid for the price tier. It's a smart pick for a budget-conscious build where the GPU and CPU are the priority spend.
Pros
- Pros:
- Lowest price on this list at 750W / 80 PLUS Gold
- Two native 8-pin PCIe connectors for the 2080 Ti
- Solid DC-to-DC voltage regulation
- 5-year warranty
Cons
- Cons:
- Semi-modular means more built-in cable clutter
- Fan is noticeably louder under full load than the premium picks above
- Less transient headroom margin than the Corsair/Seasonic/EVGA units
Bottom Line: The best choice when budget is tight but you still need a legitimately Gold-rated, correctly-sized PSU.
Editor's Rating: 4.3/5
Corsair RM650x
Best Minimum-Wattage Pick for RTX 2080The RM650x is our pick for builders running a standard (non-overclocked) RTX 2080 with a mid-range CPU, where 650W is enough continuous wattage without paying for capacity you won't use. It shares Corsair's fully modular cable design and 105°C capacitors with the RM750x and RM850x, just at a lower wattage ceiling, and still includes two native 8-pin PCIe connectors — enough for either the 2080 or the 2080 Ti's dual-connector requirement, though we'd size up to 750W if you're running a Ti alongside a high-core-count CPU. For a straightforward 2080 build, though, this is money well spent rather than money left on the table.
Pros
- Pros:
- Right-sized (not oversized) for a standard RTX 2080 build
- Fully modular, two native 8-pin PCIe connectors
- Zero-RPM silent fan mode
- 10-year warranty
- Lower price than the 750W/850W options
Cons
- Cons:
- Not enough headroom for a 2080 Ti + high-end CPU combo
- Less transient spike buffer than the higher-wattage picks
Bottom Line: The smartest buy if you're running a standard RTX 2080 and don't want to overspend on wattage you'll never use.
Editor's Rating: 4.4/5
PSU Buying Guide for RTX 2080 / 2080 Ti Builds
Match Wattage to Your Full System, Not Just the GPU
The GPU's TDP is the biggest single number, but it's not the only draw on the rail. Add up your CPU's TDP, 2-4 storage drives, RAM, fans, and any AIO pump, then compare the total against the PSU's rated wattage with at least 20-30% headroom remaining. That headroom isn't waste — it's what keeps the PSU running in its efficient middle load range and gives it room to absorb transient spikes without stress.
Count Your PCIe Connectors Before You Buy
Check your specific GPU's power connector requirement (one 8-pin vs. two 8-pin) before ordering a PSU, and make sure the unit has that many native connectors — not 6-pin cables you'd need to adapter up. Adapters are a common, avoidable point of failure under sustained load.
Choose Modular or Semi-Modular for Airflow
Fully modular PSUs let you leave out any cable you don't need, which reduces clutter and improves case airflow — a real benefit when a 2080 Ti is already dumping 250W+ of heat into the case. Semi-modular units save money but leave the 24-pin and CPU cables permanently attached, which is fine in larger cases but worth avoiding in tight, airflow-limited builds.
Don't Skip the 80 PLUS Rating
Efficiency certification isn't just an environmental checkbox — a higher-efficiency PSU wastes less power as heat, which means a cooler-running, quieter, longer-lived unit. 80 PLUS Gold is our floor recommendation for any 2080/2080 Ti build; anything lower and you're leaving voltage regulation quality on the table along with the efficiency.
Check Physical Clearance Before You Order
Most 750W-850W ATX PSUs run 140-160mm deep. Compact and mid-tower cases with front-mounted radiator space or cable routing channels can be tighter than they look — check your case's PSU clearance spec against the unit's listed depth before ordering, especially if you're also running a front AIO radiator.
Calculating PSU Wattage for an RTX 2080 Ti + High-End CPU
Here's the simplest way to size a PSU correctly for a 2080 Ti paired with a demanding CPU:
- Start with GPU TDP: RTX 2080 Ti = 250W (use the manufacturer's listed TDP for AIB/overclocked cards, which can run 260-280W).
- Add CPU TDP: A high-end CPU like a Ryzen 9 3900X (105W) or 3950X (105W) under an all-core load can pull close to or above its rated TDP.
- Add the rest of the system: budget roughly 50-80W combined for motherboard, RAM, 2-3 storage drives, and case fans.
- Total it up: 250W (GPU) + 105W (CPU) + ~65W (rest of system) = ~420W of realistic continuous draw.
- Add 30% headroom for transient spikes and efficiency: 420W x 1.3 ≈ 550W minimum — which is why we recommend sizing to 750W rather than the bare minimum, since it leaves real margin for overclocking, aging capacitors, and future upgrades rather than running the PSU at its rated ceiling every session.
Quick tip: If you're overclocking either the GPU or CPU, or running an AIB Ti card with a factory power limit above 250W, size up to 850W rather than 750W — overclocking increases both sustained draw and the size of transient spikes, and running a PSU consistently near its rated capacity shortens its usable lifespan.
Cable Management and Connector Checklist
- Confirm your GPU needs one or two 8-pin PCIe connectors and that the PSU has that many native cables
- Use one 8-pin cable per connector where possible rather than splitting a single cable into two connectors, even if the cable supports it
- Route the 24-pin ATX and CPU (4+4 or 8-pin) cables behind the motherboard tray before connecting peripherals
- Leave unused modular cables unplugged and out of the case entirely — don't coil them behind the PSU shroud where they block airflow
- Double-check the CPU power connector count on your motherboard (some boards need both an 8-pin and a supplemental 4-pin)
Is ATX 3.0 Relevant for a 2080/2080 Ti Build?
ATX 3.0 PSUs are built around the 12VHPWR connector and tighter transient response specs designed for newer GPUs. The RTX 2080 and 2080 Ti use standard 8-pin PCIe connectors, not 12VHPWR, so ATX 3.0 isn't required for these cards. That said, an ATX 3.0-rated unit like the EVGA SuperNOVA GA series still delivers better real-world transient response than an older non-ATX-3.0 design at the same price, and it future-proofs your PSU for a next-generation GPU upgrade that does use the newer connector — worth considering if you plan to keep the PSU through your next GPU refresh.
FAQ
What wattage PSU do I need for an RTX 2080 Ti?
NVIDIA's official minimum is 650W, but we recommend 750W for most builds and 850W if you're pairing the Ti with a high-core-count CPU like a Ryzen 9 3900X or 3950X, or if you're overclocking either component. The extra headroom absorbs transient spikes and keeps the PSU running in its efficient load range rather than near its rated ceiling.
Does the RTX 2080 (non-Ti) need less power than the 2080 Ti?
Yes. The standard RTX 2080 has a 215W TDP versus the 2080 Ti's 250W, and most reference 2080 cards use a single 8-pin PCIe connector rather than the Ti's typical two. A 650W PSU is generally sufficient for a 2080 build with a mid-range CPU.
How many 8-pin PCIe connectors does an RTX 2080 Ti need?
Most RTX 2080 Ti cards, including the Founders Edition, need two 8-pin PCIe connectors. Always check your specific card's spec sheet, since some reference-clocked partner cards use a single 8-pin plus a 6-pin configuration instead.
What is a transient power spike, and why does it matter for the 2080 Ti?
A transient spike is a very brief (millisecond-scale) surge in power draw well above a GPU's rated TDP, caused by rapid load changes. The RTX 2080 Ti is known for spiking meaningfully above its 250W TDP during these moments. A PSU with tight voltage regulation and adequate headroom absorbs these spikes silently; an undersized or loosely regulated unit can trip its protection circuits and shut the system down.
Is 80 PLUS Gold good enough, or should I get Platinum/Titanium?
80 PLUS Gold is our recommended floor for a 2080/2080 Ti build and delivers excellent efficiency and voltage regulation at a reasonable price. Platinum and Titanium units offer marginally better efficiency but at a real price premium that mostly matters for 24/7 workstation or server use rather than a gaming build.
Do I need a fully modular PSU for a 2080 Ti build?
It's not strictly required, but it's recommended. Fully modular cabling lets you skip unused cables entirely, improving airflow around a GPU that's already generating significant heat under load. Semi-modular units are a reasonable budget compromise; fully non-modular units make cable management noticeably harder in smaller cases.
Can I reuse an older PSU for a new RTX 2080 Ti build?
Only if it meets the wattage, connector, and age criteria above. A PSU older than 5-7 years has typically degraded capacitors that reduce its effective output and transient response even if its rated wattage looks sufficient on paper — we'd recommend replacing anything older than that generation rather than risking it under a 250W-TDP card.
Will an underpowered PSU damage my RTX 2080 Ti?
An underpowered or failing PSU is more likely to cause instability, random shutdowns, or voltage sag under load than direct GPU damage, since most GPUs and PSUs include protection circuits. That said, a poorly regulated unit can still cause real problems over time, so it's not a risk worth taking with a 250W-TDP card.
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Bottom Line
For most RTX 2080 and 2080 Ti builds, the Corsair RM850x is our top overall recommendation — it delivers enough continuous wattage and transient headroom to handle a 2080 Ti paired with a high-end CPU without a second thought, backed by a fully modular design and a 10-year warranty. If you're on a tighter budget or running a standard RTX 2080 rather than the Ti, the Corsair RM650x or Seasonic Focus GX-750 give you correctly-sized, Gold-rated reliability without paying for wattage you won't use. Whichever you choose, prioritize rated wattage headroom, native 8-pin PCIe connector count, and 80 PLUS Gold efficiency over shaving a few dollars off the sticker price — with a card that spikes well above its 250W TDP, the PSU is not the component to under-spec.