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Test Setup And Benchmarks

Nvidia GeForce GT 640 Review: Cramming Kepler Into GK107

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
Intel 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
ASRock X79 Extreme9 (LGA 2011) Chipset: Intel X79 Express
On-Board Gigabit LAN controller
Corsair Vengeance LP PC3-16000, 4 x 4 GB, 1600 MT/s, CL 8-8-8-24-2T
Afox GeForce GT 640
902 MHz GPU, 1 GB DDR3 at 891 MHz

Zotac GeForce GT 440 GDDR5
810 MHz GPU, 521 MB GDDR5 at 810 MHz

MSI N450GTS Cyclone (GeForce GTS 450)
850 MHz GPU, 1 GB GDDR5 at 980 MHz

Reference Radeon HD 6670
800 MHz GPU, 1 GB GDDR5 at 1000 MHz

Reference Radeon HD 7750
800 MHz GPU, 1 GB GDDR5 at 1125 MHz

XFX Radeon HD 6750
700 MHz GPU, 1 GB GDDR5 at 1150 MHz

All overclocked cards reduced to reference specification for testing
Hard Drive
Samsung 256 GB (SSD)
ePower EP-1200E10-T2 1200 W
Software and Drivers
Operating System
Microsoft Windows 7 x64, Service Pack 1
DirectX 11
Graphics Drivers
GeForce: 301.42 WHQL
Radeon: Catalyst 12.4 WHQL
Battlefield 3
Campaign Mode, "Operation Swordfish" 60-Seconds Fraps
Crysis 2
Adrenaline Crysis 2 Benchmark Tool, Times Square, DirectX 11
Aliens vs.
Version, 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: Skyrim
Update 1.4.27, Celedon Aethirborn Level 6, 25 Seconds Fraps
Diablo 3
Single Player Mode, "Old Tristram", 40 seconds FRAPS
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