Tom Clancy's Rainbow Six Siege
1080p@75Hz·08:15 played
Nobody·9h ago
Public2 Tips
368
FPSAverage
336
FPS1% Low
87%/67°C
65%/73°C
16 GB
92%usage
GeForce GT 645M vs GeForce GTX 1660
The GeForce GT 645M is much slower than the GeForce GTX 1660 on average across 100+ games. We cannot compare value as at least one GPU is out of stock.
GeForce GTX 166011% Score
- Up to 1420% faster on average across 100+ games
- Is 6 years and 7 months newer
- Available for $211.60
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
GeForce GTX 1660 has 739% more compute power.
Pixel Fillratehelp
GeForce GTX 1660 fills pixels 1273% faster.
Texture Fillratehelp
GeForce GTX 1660 maps textures 529% faster.
Memory Bandwidthhelp
GeForce GTX 1660 moves data 567% faster.
DDR3
Memory Typehelp
GDDR5128-bit
Memory Bushelp
192-bitGeForce 600M
Generationhelp
GeForce 16Mobile
Segmenthelp
Desktop-
Power Connectorshelp
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Outputshelp
-Frequently Asked Questions
compare_arrowsWhich is better, GeForce GT 645M or GeForce GTX 1660?expand_more
The GeForce GTX 1660. It's 1000% faster than the GeForce GT 645M on average across 100+ games, scoring 11/100 vs 1/100 in our gaming rating.
speedHow much faster is GeForce GTX 1660 than GeForce GT 645M?expand_more
1000% 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 GeForce GTX 1660?expand_more
The GeForce GTX 1660 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 GeForce GTX 1660 worth buying in 2026?expand_more
It scores 11/100 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 GeForce GTX 1660?expand_more
Performance: GeForce GT 645M scores 1/100, GeForce GTX 1660 scores 11/100. 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 GeForce GTX 1660 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 GeForce GTX 1660?expand_more
The GeForce GTX 1660 is the stronger pick at 11/100. 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 GeForce GTX 1660?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 RX 7900 XTXGT 645M vs RTX 4090GT 645M vs R7 240GT 645M vs R7 250GTX 1660 vs RTX 5070GTX 1660 vs RTX 5060 TiGTX 1660 vs RTX 5060GTX 1660 vs RTX 5070 TiGTX 1660 vs RTX 5080GTX 1660 vs RX 9070 XTGTX 1660 vs RTX 5090GTX 1660 vs RX 9060 XT 16 GBGTX 1660 vs Arc B580GTX 1660 vs GTX 1660 SUPERGTX 1660 vs RX 9070GTX 1660 vs RTX 4080GTX 1660 vs RX 7700 XTGTX 1660 vs RX 580GTX 1660 vs RX 560GTX 1660 vs RX 7900 XTGTX 1660 vs RX 6800GTX 1660 vs Arc A580GTX 1660 vs Arc A750GTX 1660 vs Arc A380GTX 1660 vs Arc B570GTX 1660 vs GT 1030GTX 1660 vs RX 7900 XTXGTX 1660 vs RTX 4090GTX 1660 vs R7 240GTX 1660 vs R7 250