RTX 3080 vs RTX 5090
RTX 3080
$700.00 new
$400.00 used on eBay
See RTX 3080 price on Amazon → See used listings on eBay →RTX 5090
$7,443.99 new
$6,900.00 used on eBay
See RTX 5090 price on Amazon → See used listings on eBay →Price difference: $6,743.99 (90.6%) — the RTX 3080 is cheaper. Used gap: $6,500.00 .
Specs compared
| Spec | RTX 3080 | RTX 5090 |
|---|---|---|
| Memory | 10 GB | ★ 32 GB |
| Memory type | GDDR6X | GDDR7 |
| Boost clock | 1710 MHz | ★ 2655 MHz |
| Core clock | — | — |
| TDP | 320 W | — |
| Interface | PCIe 4.0 | PCIe 5.0 |
| Length | — | — |
| New price | $700.00 ★ | $7,443.99 |
| Used price (eBay) | $400.00 | $6,900.00 |
★ indicates the better value for that spec.
Verdict
With the RTX 5090 running 91% above the RTX 3080 — a $6,743.99 premium — the two cards sit in meaningfully different price brackets. The RTX 3080 wins on value unless the extra performance matters for your workload.
The RTX 5090's 32 GB of VRAM is a 22 GB advantage over the RTX 3080. At 4K or in heavily modded games that extra buffer matters — and it provides headroom as future titles push VRAM requirements higher.
Unless you specifically need what the RTX 5090 offers, the RTX 3080 is the stronger value at this price gap.
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Prices as of October 15, 2026. Updated daily.