Tom Clancy's Rainbow Six Siege
1080p@75Hz·08:15 played
Nobody·10h ago
Public2 Tips
368
FPSAverage
336
FPS1% Low
87%/67°C
65%/73°C
16 GB
92%usage
GeForce GT 645M vs Radeon RX 7900 XTX
The GeForce GT 645M is much slower than the Radeon RX 7900 XTX on average across 100+ games. We cannot compare value as at least one GPU is out of stock.
Radeon RX 7900 XTX65% Score
- Up to 8483% faster on average across 100+ games
- Is 10 years and 3 months newer
- Available for $1,399.99
FPS Comparison Across Popular Games
Predicted average FPS at 1080p, 1440p, and 4K, based on real game benchmarks.
Specs & Benchmark Comparison
Side-by-side specs, synthetic benchmarks, and key hardware differences.
FP32 Computehelp
Radeon RX 7900 XTX has 10149% more compute power.
Pixel Fillratehelp
Radeon RX 7900 XTX fills pixels 7586% faster.
Texture Fillratehelp
Radeon RX 7900 XTX maps textures 3743% faster.
Memory Bandwidthhelp
Radeon RX 7900 XTX moves data 3233% faster.
DDR3
Memory Typehelp
GDDR6128-bit
Memory Bushelp
384-bitGeForce 600M
Generationhelp
Navi III (RX 7000)Mobile
Segmenthelp
Desktop-
Power Connectorshelp
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Outputshelp
-Frequently Asked Questions
compare_arrowsWhich is better, GeForce GT 645M or Radeon RX 7900 XTX?expand_more
The Radeon RX 7900 XTX. It's 6400% faster than the GeForce GT 645M on average across 100+ games, scoring 65/100 vs 1/100 in our gaming rating.
speedHow much faster is Radeon RX 7900 XTX than GeForce GT 645M?expand_more
6400% faster on average. The gap varies by game and resolution, check the per-game FPS comparison above.
aspect_ratioWhich is better for 1440p and 4K gaming, GeForce GT 645M or Radeon RX 7900 XTX?expand_more
The Radeon RX 7900 XTX is faster at both resolutions. At 4K, VRAM matters more, check the specs section to compare memory. Toggle the resolution selector above to see per-game FPS.
paidIs the Radeon RX 7900 XTX worth buying in 2026?expand_more
It scores 65/100 in our gaming rating, faster than most GPUs on the market. Good buy if the price is right.
differenceWhat is the difference between GeForce GT 645M and Radeon RX 7900 XTX?expand_more
Performance: GeForce GT 645M scores 1/100, Radeon RX 7900 XTX scores 65/100. They also differ in VRAM, memory bandwidth, power draw, and compute performance. Full breakdown in the specs section above.
compressWill the GeForce GT 645M or Radeon RX 7900 XTX bottleneck my PC?expand_more
Depends on the rest of your build, especially your CPU. Swap the paired CPU in the FPS section above to see if it limits performance, or use our bottleneck calculator for a full analysis.
upgradeIs it worth upgrading to the GeForce GT 645M or Radeon RX 7900 XTX?expand_more
The Radeon RX 7900 XTX is the stronger pick at 65/100. Compare your current GPU against it to see the exact FPS gain across 100+ games.
memoryDoes VRAM matter when comparing the GeForce GT 645M and Radeon RX 7900 XTX?expand_more
Yes, more VRAM helps at higher resolutions and in modded games. Check the specs section above to compare memory capacity and bandwidth between both GPUs.
Popular Comparisons
GT 645M vs RTX 5070GT 645M vs RTX 5060 TiGT 645M vs RTX 5060GT 645M vs RTX 5070 TiGT 645M vs RTX 5080GT 645M vs RX 9070 XTGT 645M vs RTX 5090GT 645M vs RX 9060 XT 16 GBGT 645M vs Arc B580GT 645M vs GTX 1660 SUPERGT 645M vs RX 9070GT 645M vs RTX 4080GT 645M vs RX 7700 XTGT 645M vs RX 580GT 645M vs RX 560GT 645M vs RX 7900 XTGT 645M vs RX 6800GT 645M vs Arc A580GT 645M vs Arc A750GT 645M vs Arc A380GT 645M vs Arc B570GT 645M vs GT 1030GT 645M vs RTX 4090GT 645M vs R7 240GT 645M vs R7 250RX 7900 XTX vs RTX 5070RX 7900 XTX vs RTX 5060 TiRX 7900 XTX vs RTX 5060RX 7900 XTX vs RTX 5070 TiRX 7900 XTX vs RTX 5080RX 7900 XTX vs RX 9070 XTRX 7900 XTX vs RTX 5090RX 7900 XTX vs RX 9060 XT 16 GBRX 7900 XTX vs Arc B580RX 7900 XTX vs GTX 1660 SUPERRX 7900 XTX vs RX 9070RX 7900 XTX vs RTX 4080RX 7900 XTX vs RX 7700 XTRX 7900 XTX vs RX 580RX 7900 XTX vs RX 560RX 7900 XTX vs RX 7900 XTRX 7900 XTX vs RX 6800RX 7900 XTX vs Arc A580RX 7900 XTX vs Arc A750RX 7900 XTX vs Arc A380RX 7900 XTX vs Arc B570RX 7900 XTX vs GT 1030RX 7900 XTX vs RTX 4090RX 7900 XTX vs R7 240RX 7900 XTX vs R7 250