RX 7900 XT vs RTX 5080
Brand preference aside, the RX 7900 XT and the RTX 5080 are close competitors, both pitched at high-end graphics card buyers. The data doesn’t leave much room for doubt: 1 of 2 areas go to the RX 7900 XT, and the gap is widest in power & thermals.
At a glance
- Memory Trade-off
- Power & Thermals RX 7900 XT wins
- Price RX 7900 XT wins
- GPU & Performance5.8
- Memory6.1
- Power & Thermals4.4
- GPU & Performance8.9
- Memory5.3
- Power & Thermals0.0
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
-
The RX 7900 XT has 4 GB more VRAM
A modest but measurable lead goes to the RX 7900 XT: 20 GB compared with 16 GB. More VRAM lets the card hold higher-resolution textures and bigger scenes without stutter.
-
The RTX 5080 has 20% more memory bandwidth
The RTX 5080 clearly leads on memory bandwidth, and 960 GB/s versus 800 GB/s is a difference that reaches well beyond the spec sheet. Bandwidth needs vary by architecture, so compare it alongside VRAM and cache rather than on its own.
-
The RX 7900 XT has 45 W lower board power
The RX 7900 XT is slightly stronger on total board power. The gap, 315 W versus 360 W, won’t change your life, but it isn’t nothing. The RX 7900 XT draws less power, which makes it easier to cool in compact cases.
-
The RX 7900 XT has a wider 320-bit memory bus
If everything else were equal, this small edge would favor the RX 7900 XT: 320-bit against 256-bit. The RX 7900 XT’s wider bus supports higher bandwidth, which helps most at high resolutions.
-
The RX 7900 XT has a smaller 750 W PSU requirement
Not a big gap, but a consistent one. The RX 7900 XT’s 750 W beats the RTX 5080’s 850 W. With the RX 7900 XT, you’re more likely to keep your existing power supply, which can save real money.
Design & Size
- RX 7900 XT 10.87 in × 2.5 slots
- RTX 5080 11.97 in × 2 slots
The RTX 5080 is physically larger, so the RX 7900 XT will be the easier fit wherever space is limited.
Size & Connectivity
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Reference card length | 10.87 in | 11.97 in |
| Slot width | 2.5 slots | 2 slots |
| Display outputs | 2x DisplayPort 2.1, 1x HDMI 2.1, 1x USB-C | 3x DisplayPort 2.1b, 1x HDMI 2.1b |
GPU & Performance
Nothing to tally in the gpu & performance section, but plenty to read. The table lists what the RX 7900 XT and the RTX 5080 each use.
Memory
Trade-off
Each side wins something here. The RX 7900 XT offers 4 GB more VRAM; the RTX 5080 offers 20% more memory bandwidth. The takeaway: memory is a matter of preference rather than a clear verdict.
VRAM
RX 7900 XT: 20 GB RTX 5080: 16 GB At high resolutions or with texture packs, running out of VRAM can hurt more than a small speed gap.
Memory bandwidth
RX 7900 XT: 800 GB/s RTX 5080: 960 GB/s The RTX 5080 has more bandwidth to work with, helping it hold up in memory-heavy games.
Features
In the features section, the key entries are names rather than numbers, so compare what the RX 7900 XT and the RTX 5080 list in the table below.
Power & Thermals
RX 7900 XT leads
On power & thermals, the RX 7900 XT comes out slightly ahead. The RX 7900 XT brings 45 W lower board power. Higher board power often comes with higher performance, so the RTX 5080’s appetite may be part of the price of its speed. Prioritize power & thermals, and the RX 7900 XT is where you should land.
Total board power
RX 7900 XT: 315 W RTX 5080: 360 W Lower board power means less heat, quieter cooling and a smaller impact on your electricity bill.
Recommended PSU
RX 7900 XT: 750 W RTX 5080: 850 W Recommendations include a safety margin for the rest of the system, so they’re a guide rather than a hard limit.
Full Specifications
GPU & Performance
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Architecture | RDNA 3 | Blackwell |
| GPU die | Navi 31 | GB203 |
| Process | TSMC N5 (GCD) + N6 (MCD) chiplets | TSMC 4N |
| Shader units | 5,376 | 10,752 Most shader units |
| Ray tracing units | 84 | 84 |
| Base clock | N/A (not specified) | 2,295 MHz |
| Boost clock | 2,400 MHz | 2,617 MHz Highest boost clock |
| FP32 computeTheoretical peak; AMD counts dual-issue, so compare within a brand only | 51.6 TFLOPS | 56.3 TFLOPS |
Memory
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| VRAM | 20 GB (winner) | 16 GB |
| Memory type | GDDR6 | GDDR7 |
| Memory bus | 320-bit (winner) | 256-bit |
| Memory bandwidth | 800 GB/s | 960 GB/s (winner) |
Features
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Upscaling | FSR 3 | DLSS 4 Super Resolution |
| Frame generation | FSR 3 Frame Generation, AFMF 2 | DLSS 4 Multi Frame Generation (up to 4x) |
| PCIe interface | PCIe 4.0 x16 | PCIe 5.0 x16 |
Power & Thermals
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Total board power | 315 W (winner) | 360 W Most power-hungry in class |
| Recommended PSU | 750 W (winner) | 850 W Biggest PSU requirement |
| Power connector | 2x 8-pin | 1x 16-pin (12V-2x6) |
Size & Connectivity
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Reference card length | 10.87 in | 11.97 in |
| Slot width | 2.5 slots | 2 slots |
| Display outputs | 2x DisplayPort 2.1, 1x HDMI 2.1, 1x USB-C | 3x DisplayPort 2.1b, 1x HDMI 2.1b |
Price
| Spec | RX 7900 XT | RTX 5080 |
|---|---|---|
| Launch price (MSRP) | $899 (winner) Lowest price in class | $999 |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Price & Value
The RTX 5080 asked only $100 more at launch. The RX 7900 XT is both $100 cheaper and ahead on more of the specs we compared.
Based on US launch pricing as of January 2025. Deals and regional pricing can change the picture.
Which One Should You Buy?
Choose the RX 7900 XT if…
- you play at high resolutions with high-quality textures (20 GB vs 16 GB VRAM)
- you want lower power draw and less heat (315 W vs 360 W board power)
- you push high resolutions where memory width helps (320-bit vs 256-bit bus)
- you’re building on a modest power supply (750 W vs 850 W)
- you’re working to a firm budget and $100 matters
Choose the RTX 5080 if…
- you want more memory bandwidth (960 GB/s vs 800 GB/s)
- you prefer a larger card and have the room for it
- you already use other NVIDIA products
Also Compared
Frequently Asked Questions
Which is better for most people, the RX 7900 XT or the RTX 5080?
We’d point most buyers to the RX 7900 XT. The main exception is if you know that 20% more memory bandwidth would make a real difference in your routine.
Is the RX 7900 XT bigger than the RTX 5080?
The RTX 5080 is the larger of the two. It measures 11.97 in, compared with 10.87 in for the RX 7900 XT.
Which is faster, the RX 7900 XT or the RTX 5080?
The RX 7900 XT uses RDNA 3, while the RTX 5080 uses Blackwell. How that translates into speed depends on the workloads you care about.
Which costs less, the RX 7900 XT or the RTX 5080?
The RTX 5080 launched at $100 more than the RX 7900 XT, based on prices as of January 2025.
Executive Summary
Comparing the RX 7900 XT and the RTX 5080 feels a bit like comparing two good restaurants with different menus. For me, the deciding factor is that only the RX 7900 XT gives you 4 GB more VRAM. I’d also count 45 W lower board power in the RX 7900 XT’s favor. To be fair, the RTX 5080 has 20% more memory bandwidth, and that’s not nothing.
I’d steer power & thermals fans toward the RX 7900 XT and memory bandwidth fans toward the RTX 5080.
My pick: the RX 7900 XT. The RTX 5080 only comes out ahead if you care more about 20% more memory bandwidth than anything else.
Personal opinion based on the data above. Your priorities may differ.