GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
21%
21%
AMD Radeon HD 7970
532%
532%
AMD Radeon HD 7970 is approximately 511% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | Tahiti |
| CoresDifferent | 384 | 2048 |
| TMUsDifferent | 32 | 128 |
| ROPsDifferent | 16 | 32 |
| Memory SizeDifferent | 2 GB | 3 GB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Bus WidthDifferent | 128 bit | 384 bit |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| GPU NameDifferent | GK107 | Tahiti |
| GPU VariantDifferent | GK107-300-A2 | Tahiti XT(215-0821060) |
| ArchitectureDifferent | Kepler | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| TransistorsDifferent | 1,270 million | 4,313 million |
| DensityDifferent | 10.8M / mm² | 12.3M / mm² |
| Die SizeDifferent | 118 mm² | 352 mm² |
| Chip PackageDifferent | BGA-908 | N/A |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Jan 9th, 2012 |
| GenerationDifferent | GeForce 600 | Southern Islands(HD 7900) |
| PredecessorDifferent | GeForce 500 | Northern Islands |
| SuccessorDifferent | GeForce 700 | Sea Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 99 USD | 549 USD |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| ReviewsDifferent | 8 in our database | 191 in our database |
| AnnouncedDifferent | N/A | Dec 22nd, 2011 |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | 925 MHz |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 1375 MHz5.5 Gbps effective |
Memory
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 3 GB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Memory BusDifferent | 128 bit | 384 bit |
| BandwidthDifferent | 28.51 GB/s | 264.0 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Shading UnitsDifferent | 384 | 2048 |
| TMUsDifferent | 32 | 128 |
| ROPsDifferent | 16 | 32 |
| SMX CountDifferent | 2 | N/A |
| L1 CacheDifferent | 16 KB (per SMX) | 16 KB (per CU) |
| L2 CacheDifferent | 256 KB | 768 KB |
| Compute UnitsDifferent | N/A | 32 |
Theoretical Performance
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 29.60 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 118.4 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 3.789 TFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | 947.2 GFLOPS (1:4) |
Board Design
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| Slot WidthDifferent | Single-slot | Dual-slot |
| LengthDifferent | 145 mm5.7 inches | 275 mm10.8 inches |
| TDPDifferent | 65 W | 250 W |
| Suggested PSUDifferent | 250 W | 600 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 |
| Power ConnectorsDifferent | None | 1x 6-pin + 1x 8-pin |
| Board NumberDifferent | P2011 SKU 0 | 109-C38637-00 |
| HeightDifferent | N/A | 111 mm4.4 inches |
| WidthDifferent | N/A | 38 mm1.5 inches |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7970 |
|---|---|---|
| DirectXDifferent | 12 (11_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCLDifferent | 3.0 | 2.1 (1.2) |
| VulkanDifferent | 1.2.175 | 1.2.170 |
| CUDADifferent | 3.0 | N/A |
| Shader Model | 6.5 (5.1) | 6.5 (5.1) |
Comparison Summary
7
Specifications Compared
8
Feature Categories
50
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
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NVIDIA GeForce GT 640 vs Radeon HD 4830
Radeon HD 4830 Performance111%
Radeon HD 4830 is 11% faster than NVIDIA GeForce GT 640
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NVIDIA GeForce GT 640 vs Radeon HD 6670
Radeon HD 6670 Performance108%
Radeon HD 6670 is 8% faster than NVIDIA GeForce GT 640
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NVIDIA GeForce GT 640 vs GeForce 9800 GT
GeForce 9800 GT Performance103%
GeForce 9800 GT is 3% faster than NVIDIA GeForce GT 640
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NVIDIA GeForce GT 640 vs GeForce GT 640
GeForce GT 640 Performance100%
GeForce GT 640 is 0% slower than NVIDIA GeForce GT 640
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NVIDIA GeForce GT 640 vs Radeon HD 5670
Radeon HD 5670 Performance93%
Radeon HD 5670 is 7% slower than NVIDIA GeForce GT 640
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More Comparisons with AMD Radeon HD 7970
Compare AMD Radeon HD 7970 with other GPUs of similar performance
AMD Radeon HD 7970 vs Radeon HD 7970 GHz Edition
Radeon HD 7970 GHz Edition Performance113%
Radeon HD 7970 GHz Edition is 13% faster than AMD Radeon HD 7970
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AMD Radeon HD 7970 vs GeForce GTX 590
GeForce GTX 590 Performance113%
GeForce GTX 590 is 13% faster than AMD Radeon HD 7970
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AMD Radeon HD 7970 vs Radeon R9 280X
Radeon R9 280X Performance111%
Radeon R9 280X is 11% faster than AMD Radeon HD 7970
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AMD Radeon HD 7970 vs Radeon HD 6990
Radeon HD 6990 Performance109%
Radeon HD 6990 is 9% faster than AMD Radeon HD 7970
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AMD Radeon HD 7970 vs GeForce GTX 1050 Ti
GeForce GTX 1050 Ti Performance103%
GeForce GTX 1050 Ti is 3% faster than AMD Radeon HD 7970
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AMD Radeon HD 7970 vs GeForce GTX 680
GeForce GTX 680 Performance101%
GeForce GTX 680 is 1% faster than AMD Radeon HD 7970
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