RX 7900 XTX vs RTX 4080 Super
The RX 7900 XTX and the RTX 4080 Super are direct rivals in the high-end graphics card class, one from AMD and one from NVIDIA. Across 2 compared areas, the RX 7900 XTX takes 1. The widest gap shows up under memory.
At a glance
- Memory RX 7900 XTX wins
- Power & Thermals RTX 4080 Super wins
- Price Tie
- GPU & Performance7.8
- Memory10.0
- Power & Thermals1.1
- GPU & Performance8.0
- Memory3.1
- Power & Thermals4.1
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
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The RX 7900 XTX has 8 GB more VRAM
Of all the specs we compared, this is one where the RX 7900 XTX makes its strongest case: 24 GB against 16 GB. More VRAM lets the card hold higher-resolution textures and bigger scenes without stutter.
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The RX 7900 XTX has 30% more memory bandwidth
The RX 7900 XTX clearly leads on memory bandwidth, and 960 GB/s versus 736 GB/s is a difference that reaches well beyond the spec sheet. Memory bandwidth decides how quickly the GPU can feed itself with data, which matters most at 1440p and 4K.
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The RTX 4080 Super has 35 W lower board power
Slight advantage to the RTX 4080 Super: 320 W compared with 355 W. Lower board power means less heat, quieter cooling and a smaller impact on your electricity bill.
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The RX 7900 XTX has a wider 384-bit memory bus
On memory bus, the RX 7900 XTX posts 384-bit against 256-bit for the RTX 4080 Super, a gap big enough to feel in everyday use. A wider memory bus moves more data per clock between the GPU and its memory.
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The RTX 4080 Super has a smaller 750 W PSU requirement
On recommended psu, the RTX 4080 Super edges out the RX 7900 XTX, 750 W to 800 W. Recommendations include a safety margin for the rest of the system, so they’re a guide rather than a hard limit.
Design & Size
- RX 7900 XTX 11.30 in × 2.5 slots
- RTX 4080 Super 11.97 in × 3 slots
The RTX 4080 Super is the larger card of the two, while the RX 7900 XTX is the more compact choice.
Size & Connectivity
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Reference card length | 11.30 in | 11.97 in |
| Slot width | 2.5 slots | 3 slots |
| Display outputs | 2x DisplayPort 2.1, 1x HDMI 2.1, 1x USB-C | 3x DisplayPort 1.4a, 1x HDMI 2.1 |
GPU & Performance
The gpu & performance comparison is about what’s inside rather than how much. See the table for the RX 7900 XTX’s and the RTX 4080 Super’s entries.
Memory
RX 7900 XTX leads
The RX 7900 XTX dominates the memory section, and the gaps are large enough to matter in daily use. The RX 7900 XTX answers with 8 GB more VRAM. Newer games tend to ask for more video memory, so the RX 7900 XTX’s extra VRAM helps the card age better. Prioritize memory, and the RX 7900 XTX is where you should land.
VRAM
RX 7900 XTX: 24 GB RTX 4080 Super: 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 XTX: 960 GB/s RTX 4080 Super: 736 GB/s Bandwidth needs vary by architecture, so compare it alongside VRAM and cache rather than on its own.
Features
We don’t score this area directly, because the features specs are labels rather than measurements. The table shows what each lists.
Power & Thermals
RTX 4080 Super leads
The RX 7900 XTX comes close on power & thermals, but the RTX 4080 Super does just enough to lead. The RTX 4080 Super takes this one with 35 W lower board power. Higher board power often comes with higher performance, so the RX 7900 XTX’s appetite may be part of the price of its speed. Weighing only power & thermals, the RTX 4080 Super comes out ahead.
Total board power
RX 7900 XTX: 355 W RTX 4080 Super: 320 W The RTX 4080 Super draws less power, which makes it easier to cool in compact cases.
Recommended PSU
RX 7900 XTX: 800 W RTX 4080 Super: 750 W The recommended power supply tells you whether your current PSU can handle the card without an upgrade.
Full Specifications
GPU & Performance
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Architecture | RDNA 3 | Ada Lovelace |
| GPU die | Navi 31 | AD103 |
| Process | TSMC N5 (GCD) + N6 (MCD) chiplets | TSMC 4N |
| Shader units | 6,144 | 10,240 |
| Ray tracing units | 96 Most ray tracing units | 80 |
| Base clock | N/A (not specified) | 2,295 MHz |
| Boost clock | 2,500 MHz | 2,550 MHz |
| FP32 computeTheoretical peak; AMD counts dual-issue, so compare within a brand only | 61.4 TFLOPS Most compute in class | 52.2 TFLOPS |
Memory
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| VRAM | 24 GB (winner) Most VRAM in class | 16 GB |
| Memory type | GDDR6 | GDDR6X |
| Memory bus | 384-bit (winner) | 256-bit |
| Memory bandwidth | 960 GB/s (winner) | 736 GB/s |
Features
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Upscaling | FSR 3 | DLSS Super Resolution |
| Frame generation | FSR 3 Frame Generation, AFMF 2 | DLSS Frame Generation (2x) |
| PCIe interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
Power & Thermals
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Total board power | 355 W | 320 W (winner) |
| Recommended PSU | 800 W | 750 W (winner) |
| Power connector | 2x 8-pin | 1x 16-pin (12VHPWR) |
Size & Connectivity
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Reference card length | 11.30 in | 11.97 in |
| Slot width | 2.5 slots | 3 slots |
| Display outputs | 2x DisplayPort 2.1, 1x HDMI 2.1, 1x USB-C | 3x DisplayPort 1.4a, 1x HDMI 2.1 |
Price
| Spec | RX 7900 XTX | RTX 4080 Super |
|---|---|---|
| Launch price (MSRP) | $999 | $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
At launch, the RX 7900 XTX and the RTX 4080 Super cost the same.
Launch prices (US) as of January 2024. Discounts and bundles come and go, so compare current prices before buying.
Which One Should You Buy?
Choose the RX 7900 XTX if…
- you play at high resolutions with high-quality textures (24 GB vs 16 GB VRAM)
- you want more memory bandwidth (960 GB/s vs 736 GB/s)
- you push high resolutions where memory width helps (384-bit vs 256-bit bus)
Choose the RTX 4080 Super if…
- you care about your power bill and a quieter case (320 W vs 355 W)
- you want to keep your current power supply (750 W vs 800 W recommended PSU)
- you like more of everything, size included
Also Compared
Frequently Asked Questions
Should I buy the RX 7900 XTX or the RTX 4080 Super?
The RX 7900 XTX wins more of the areas we compared, so it’s the safer pick unless having 35 W lower board power matters more to you than the rest.
Is the RX 7900 XTX bigger than the RTX 4080 Super?
It’s the RTX 4080 Super that is larger: 11.97 in, versus 11.30 in for the RX 7900 XTX.
Does the RX 7900 XTX perform better than the RTX 4080 Super?
It comes down to the chips: RDNA 3 in the RX 7900 XTX versus Ada Lovelace in the RTX 4080 Super. Our spec data lists them by name rather than by a single score.
Executive Summary
Cross-brand comparisons are where I find the real differences in philosophy, and the RX 7900 XTX versus the RTX 4080 Super shows that nicely. I’d put 8 GB more VRAM at the top of the list, and it belongs to the RX 7900 XTX. Nor should you ignore that the RX 7900 XTX has a wider 384-bit memory bus. That said, the RTX 4080 Super answers with 35 W lower board power, which some people will value more.
If your days lean on memory, I’d pick the RX 7900 XTX; if they lean on power & thermals, the RTX 4080 Super.
My pick: the RX 7900 XTX, though I’d happily point you to the RTX 4080 Super if you specifically want 35 W lower board power, where the RTX 4080 Super has the edge.
Personal opinion based on the data above. Your priorities may differ.