RTX 3090 vs RX 6900 XT
Which GPU is the better buy in 2026? Live Amazon prices updated daily.
Our pick: RX 6900 XT — best Value Score at current prices.
Specs & Benchmarks
| Spec | RTX 3090 | RX 6900 XT |
|---|---|---|
| Brand | NVIDIA | AMD |
| VRAM | 24 GB | 16 GB |
| FP32 TFLOPS | 71 | 23 |
| 3DMark TimeSpy | 16,500 | 17,000 |
| Performance Index | 45.0 | 37.2 |
| Current Price | $1,384.99 | $459.99 |
| Value Score | 32 | 81 |
| Categories | Gaming AI Rendering | Gaming AI |
Which GPU Should You Buy?
The RX 6900 XT wins on value with a Value Score of 81 vs 32. That means more performance per dollar at current Amazon prices.
Prices change daily — always verify on Amazon before purchasing.
Current Amazon Prices
How We Score GPUs
Each GPU shows a Value score (0–100) — performance per dollar, scaled so the best deals reach 100.
Value score (0–100) = performance per dollar × 10.
RTX 4090 reference price ~$1,700 → score 59. A used RTX 3070 Ti at $339 → score ~100.
Excellent ≥ 90 · Good 75–89 · Fair 60–74 · Poor < 60.
Performance Index = 0.70 × (3DMark TimeSpy ÷ 360) + 0.30 × (FP32 TFLOPS ÷ 1.65). Prices from Amazon US, updated daily.
Frequently Asked Questions
Which is faster, the RTX 3090 or the RX 6900 XT?
The RTX 3090 is faster with a Performance Index of 45.0 versus 37.2 for the RX 6900 XT — approximately 21% more raw performance. Performance Index = 0.70 × (TimeSpy ÷ 360) + 0.30 × (FP32 TFLOPS ÷ 1.65).
Which is better value, the RTX 3090 or the RX 6900 XT?
Based on current Amazon prices, the RX 6900 XT offers better value with a Value Score of 81 versus 32. Value Score (0–100) = performance per dollar × 10, capped at 100.
Should I buy the RTX 3090 or the RX 6900 XT?
If price-to-performance is your priority, the RX 6900 XT is the better buy based on current Amazon prices. Always check both listings before purchasing as prices change daily.
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