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Nvidia GeForce GT 640 Review: Cramming Kepler Into GK107

Test Setup And Benchmarks

We're comparing Afox’s GeForce GT 640 DDR3 to the similarly-priced competition, including the Radeon HD 6670, 6750, and 7750. In addition, we have a GeForce GT 440 GDDR5 and GTS 450 to factor in. Because a number of these boards are actually retail products featuring custom specifications, we wanted to assure you that they've all been set to their reference clock rates in order to create the fairest contest possible.

Both a minimum/average frame rate chart and a frame rate-over-time chart are included for each resolution, as we think the combination of these delivers a great overall picture of actual performance. Frame rates over 60 FPS are only captured in the minimum/average chart, allowing us to hone in on sub-60 FPS performance when it comes to scrutinizing frame rates over time to see where things get choppy.

Test System
CPUIntel Core i7-3960X (Sandy Bridge-E), 3.3 GHz, Six Cores, LGA 2011, 15 MB Shared L3 Cache, Hyper-Threading enabled. Overclocked to 4.25 GHz
MotherboardASRock X79 Extreme9 (LGA 2011) Chipset: Intel X79 Express
NetworkingOn-Board Gigabit LAN controller
MemoryCorsair Vengeance LP PC3-16000, 4 x 4 GB, 1600 MT/s, CL 8-8-8-24-2T
GraphicsAfox GeForce GT 640902 MHz GPU, 1 GB DDR3 at 891 MHzZotac GeForce GT 440 GDDR5810 MHz GPU, 521 MB GDDR5 at 810 MHzMSI N450GTS Cyclone (GeForce GTS 450)850 MHz GPU, 1 GB GDDR5 at 980 MHzReference Radeon HD 6670800 MHz GPU, 1 GB GDDR5 at 1000 MHzReference Radeon HD 7750800 MHz GPU, 1 GB GDDR5 at 1125 MHzXFX Radeon HD 6750700 MHz GPU, 1 GB GDDR5 at 1150 MHzAll overclocked cards reduced to reference specification for testing
Hard DriveSamsung 256 GB (SSD)
PowerePower EP-1200E10-T2 1200 W ATX12V, EPS12V
Software and Drivers
Operating SystemMicrosoft Windows 7 x64, Service Pack 1
DirectXDirectX 11
Graphics DriversGeForce: 301.42 WHQLRadeon: Catalyst 12.4 WHQL
Battlefield 3Campaign Mode, "Operation Swordfish" 60-Seconds Fraps
Crysis 2Adrenaline Crysis 2 Benchmark Tool, Times Square, DirectX 11
Aliens vs. PredatorVersion, DirectX 11 Benchmark
Metro 2033Full Game, Built-In Benchmark, "Frontline" Scene DX9, High, AAA, 4x AF, No PhysX
DiRT 3V1.01, Run with -benchmark example_benchmark.xml
The Elder Scrolls V: SkyrimUpdate 1.4.27, Celedon Aethirborn Level 6, 25 Seconds Fraps
Diablo 3Single Player Mode, "Old Tristram", 40 seconds FRAPS