GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
20%
20%
AMD Radeon HD 6990
512%
512%
AMD Radeon HD 6990 is approximately 492% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | Antilles x2 |
| CoresDifferent | 384 | 1536 x2 |
| TMUsDifferent | 32 | 96 x2 |
| ROPsDifferent | 16 | 32 x2 |
| Memory SizeDifferent | 2 GB | 2 GB x2 |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Bus WidthDifferent | 128 bit | 256 bit x2 |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| GPU NameDifferent | GK107 | Antilles |
| GPU VariantDifferent | GK107-300-A2 | Antilles XT(215-0807027) |
| ArchitectureDifferent | Kepler | TeraScale 3 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 1,270 million | 2,640 million |
| DensityDifferent | 10.8M / mm² | 6.8M / mm² |
| Die SizeDifferent | 118 mm² | 389 mm² |
| Chip PackageDifferent | BGA-908 | N/A |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Mar 8th, 2011 |
| GenerationDifferent | GeForce 600 | Northern Islands(HD 6900) |
| PredecessorDifferent | GeForce 500 | Evergreen |
| SuccessorDifferent | GeForce 700 | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 99 USD | 699 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 8 in our database | 47 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | 830 MHz |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 1250 MHz5 Gbps effective |
Memory
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Memory Size | 2 GB | 2 GB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Memory BusDifferent | 128 bit | 256 bit |
| BandwidthDifferent | 28.51 GB/s | 160.0 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Shading UnitsDifferent | 384 | 1536 |
| TMUsDifferent | 32 | 96 |
| ROPsDifferent | 16 | 32 |
| 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 | 24 |
Theoretical Performance
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 26.56 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 79.68 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 2.550 TFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | 637.4 GFLOPS (1:4) |
Board Design
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| Slot WidthDifferent | Single-slot | Dual-slot |
| LengthDifferent | 145 mm5.7 inches | 310 mm12.2 inches |
| TDPDifferent | 65 W | 375 W |
| Suggested PSUDifferent | 250 W | 750 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 1x DVI4x mini-DisplayPort 1.2 |
| Power ConnectorsDifferent | None | 2x 8-pin |
| Board NumberDifferent | P2011 SKU 0 | 109-C20647-00 |
| HeightDifferent | N/A | 115 mm4.5 inches |
| WidthDifferent | N/A | 40 mm1.6 inches |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6990 |
|---|---|---|
| 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
49
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
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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 6990
Compare AMD Radeon HD 6990 with other GPUs of similar performance
AMD Radeon HD 6990 vs GeForce GTX 1650
GeForce GTX 1650 Performance119%
GeForce GTX 1650 is 19% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon RX 6400
Radeon RX 6400 Performance117%
Radeon RX 6400 is 17% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Arc A380
Arc A380 Performance115%
Arc A380 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 780
GeForce GTX 780 Performance115%
GeForce GTX 780 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon HD 7970 GHz Edition
Radeon HD 7970 GHz Edition Performance104%
Radeon HD 7970 GHz Edition is 4% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 590
GeForce GTX 590 Performance104%
GeForce GTX 590 is 4% faster than AMD Radeon HD 6990
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