GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
54%
54%
AMD Radeon HD 6790
184%
184%
AMD Radeon HD 6790 is approximately 130% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | Barts |
| CoresDifferent | 384 | 800 |
| TMUsDifferent | 32 | 40 |
| ROPs | 16 | 16 |
| Memory SizeDifferent | 2 GB | 1024 MB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Bus WidthDifferent | 128 bit | 256 bit |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| GPU NameDifferent | GK107 | Barts |
| GPU VariantDifferent | GK107-300-A2 | Barts LE(215-0798002) |
| ArchitectureDifferent | Kepler | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 1,270 million | 1,700 million |
| DensityDifferent | 10.8M / mm² | 6.7M / mm² |
| Die SizeDifferent | 118 mm² | 255 mm² |
| Chip PackageDifferent | BGA-908 | HFCBGA-1737 |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Apr 4th, 2011 |
| GenerationDifferent | GeForce 600 | Northern Islands(HD 6700) |
| PredecessorDifferent | GeForce 500 | Evergreen |
| SuccessorDifferent | GeForce 700 | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 99 USD | 149 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 8 in our database | 37 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | 840 MHz |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 1050 MHz4.2 Gbps effective |
Memory
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 1024 MB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Memory BusDifferent | 128 bit | 256 bit |
| BandwidthDifferent | 28.51 GB/s | 134.4 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Shading UnitsDifferent | 384 | 800 |
| TMUsDifferent | 32 | 40 |
| ROPs | 16 | 16 |
| SMX CountDifferent | 2 | N/A |
| L1 CacheDifferent | 16 KB (per SMX) | 8 KB (per CU) |
| L2 CacheDifferent | 256 KB | 512 KB |
| Compute UnitsDifferent | N/A | 10 |
Theoretical Performance
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 13.44 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 33.60 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 1,344.0 GFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | N/A |
Board Design
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| Slot WidthDifferent | Single-slot | Dual-slot |
| LengthDifferent | 145 mm5.7 inches | 198 mm7.8 inches |
| TDPDifferent | 65 W | 150 W |
| Suggested PSUDifferent | 250 W | 450 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 2x DVI1x HDMI 1.3a1x DisplayPort 1.1 |
| Power ConnectorsDifferent | None | 2x 6-pin |
| Board NumberDifferent | P2011 SKU 0 | C220, 109-C22237-00 |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6790 |
|---|---|---|
| DirectXDifferent | 12 (11_0) | 11.2 (11_0) |
| OpenGLDifferent | 4.6 | 4.4 |
| OpenCLDifferent | 3.0 | 1.2 |
| VulkanDifferent | 1.2.175 | N/A |
| CUDADifferent | 3.0 | N/A |
| Shader ModelDifferent | 6.5 (5.1) | 5.0 |
Comparison Summary
7
Specifications Compared
8
Feature Categories
47
Detailed Features
More Comparisons with NVIDIA GeForce GT 640
Compare NVIDIA GeForce GT 640 with other GPUs of similar performance
NVIDIA GeForce GT 640 vs Radeon HD 4770
Radeon HD 4770 Performance119%
Radeon HD 4770 is 19% faster than NVIDIA GeForce GT 640
Compare Detailed Specs
NVIDIA GeForce GT 640 vs Radeon HD 4830
Radeon HD 4830 Performance111%
Radeon HD 4830 is 11% faster than NVIDIA GeForce GT 640
Compare Detailed Specs
NVIDIA GeForce GT 640 vs Radeon HD 6670
Radeon HD 6670 Performance108%
Radeon HD 6670 is 8% faster than NVIDIA GeForce GT 640
Compare Detailed Specs
NVIDIA GeForce GT 640 vs GeForce 9800 GT
GeForce 9800 GT Performance103%
GeForce 9800 GT is 3% faster than NVIDIA GeForce GT 640
Compare Detailed Specs
NVIDIA GeForce GT 640 vs GeForce GT 640
GeForce GT 640 Performance100%
GeForce GT 640 is 0% slower than NVIDIA GeForce GT 640
Compare Detailed Specs
NVIDIA GeForce GT 640 vs Radeon HD 5670
Radeon HD 5670 Performance93%
Radeon HD 5670 is 7% slower than NVIDIA GeForce GT 640
Compare Detailed Specs
More Comparisons with AMD Radeon HD 6790
Compare AMD Radeon HD 6790 with other GPUs of similar performance
AMD Radeon HD 6790 vs GeForce GTX 285
GeForce GTX 285 Performance119%
GeForce GTX 285 is 19% faster than AMD Radeon HD 6790
Compare Detailed Specs
AMD Radeon HD 6790 vs Radeon HD 6850
Radeon HD 6850 Performance116%
Radeon HD 6850 is 16% faster than AMD Radeon HD 6790
Compare Detailed Specs
AMD Radeon HD 6790 vs GeForce GTX 280
GeForce GTX 280 Performance109%
GeForce GTX 280 is 9% faster than AMD Radeon HD 6790
Compare Detailed Specs
AMD Radeon HD 6790 vs Radeon HD 7770 GHz Edition
Radeon HD 7770 GHz Edition Performance109%
Radeon HD 7770 GHz Edition is 9% faster than AMD Radeon HD 6790
Compare Detailed Specs
AMD Radeon HD 6790 vs GeForce GTX 275
GeForce GTX 275 Performance108%
GeForce GTX 275 is 8% faster than AMD Radeon HD 6790
Compare Detailed Specs
AMD Radeon HD 6790 vs GeForce GTX 460
GeForce GTX 460 Performance106%
GeForce GTX 460 is 6% faster than AMD Radeon HD 6790
Compare Detailed Specs