GPU vs GPU
RTX 3080 (used) vs RTX 5070
The RTX 5070 is 18% faster at 1440p but costs $444 more. For value, the RTX 3080 (used) gives more fps per dollar; buy the RTX 5070 only if you need the extra speed.
Key facts· updated
- At 1440p the RTX 3080 averages 82 fps and the RTX 5070 averages 96 fps (Tom's Hardware GPU hierarchy, June 2026, 11-game average at Ultra).
- The RTX 5070 is 18% faster than the RTX 3080 at 1440p (Tom's Hardware GPU hierarchy, June 2026).
- The used RTX 3080 costs $425 and the RTX 5070 costs $869 (PC Atlas price check, Nov 3, 2026; catalog estimates, not live store prices).
- At those prices the RTX 3080 gives the most 1440p fps per $100: 19.3 vs 11.1.
- The RTX 3080 has 10 GB of video memory and the RTX 5070 has 12 GB (maker spec pages, checked Oct 29, 2026).
| Spec | RTX 3080 (used) | RTX 5070 |
|---|---|---|
| Price today | $425Sample | $869Sample |
| Average fps at 1080p | 112 | 133 |
| Average fps at 1440p | 82 | 96 |
| Average fps at 4K | 44 | 54 |
| fps per $100 at 1440p | 19.3 | 11.1 |
| Video memory | 10 GB | 12 GB |
| Gaming power | ~320 W | ~250 W |
| Power supply advice | - | 650 W |
| Card length | ~300 mm | ~285 mm |
| Power plug | 8-pin PCIe | 8-pin or 12V-2x6 (by model) |
fps: Tom's Hardware GPU hierarchy (June 2026), 11-game average at Ultra. Highlighted = better. Prices last checked . Prices marked Sample are PC Atlas catalog estimates, not live store prices.
Which one should you buy?
Used or new? A used RTX 3080 10GB is the kind of card that shows up cheap on eBay, and the RTX 5070 12GB is what you'd buy new at a similar budget. In the Tom's Hardware GPU hierarchy (June 2026), the RTX 3080 10GB (used) averages 82 fps at 1440p and 44 at 4K; the RTX 5070 12GB averages 96 and 54. At 1080p the averages are 112 and 133 fps. That makes the RTX 5070 12GB about 17% faster at 1440p (19% at 1080p, 23% at 4K).
Memory differs: 10GB on the RTX 3080 10GB (used) against 12GB on the RTX 5070 12GB. More memory keeps texture settings high for longer as games get heavier. In games the RTX 3080 10GB (used) draws about 320W and the RTX 5070 12GB about 250W; power supply advice is about 750W (our rule of thumb) vs 650W (maker's advice). The RTX 3080 10GB (used) is about 300mm long, 2.5 slots thick and uses standard 8-pin power; the RTX 5070 12GB is about 285mm long, 2.5 slots thick with 8-pin or 12V-2x6 depending on the model.
Both use DLSS for upscaling. A used card's real price swings a lot by listing, so compare the live price here with the condition in the photos.
Our take: used cards save money but usually lose the store warranty, so buy from sellers with returns and check the photos. If the used card isn't clearly cheaper per frame, buy new.
Good to know
- Used cards have no store warranty in most cases; buy from sellers with returns and check the listing photos.
Questions
Is the RTX 3080 (used) better than the RTX 5070?
The RTX 5070 is 18% faster at 1440p but costs $444 more. For value, the RTX 3080 (used) gives more fps per dollar; buy the RTX 5070 only if you need the extra speed.
Which is better value, RTX 3080 (used) or RTX 5070?
At today's prices the RTX 3080 (used) gives more frames per dollar at 1440p (19.3 vs 11.1 fps per $100).
What power supply do I need?
RTX 3080 (used): about 750 W with a typical gaming CPU. RTX 5070: 650 W (the maker's advice).
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