GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
13%
13%
AMD Radeon HD 7990
747%
747%
AMD Radeon HD 7990 is approximately 734% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | Malta x2 |
| CoresDifferent | 384 | 2048 x2 |
| TMUsDifferent | 32 | 128 x2 |
| ROPsDifferent | 16 | 32 x2 |
| Memory SizeDifferent | 2 GB | 3 GB x2 |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Bus WidthDifferent | 128 bit | 384 bit x2 |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| GPU NameDifferent | GK107 | Malta |
| GPU VariantDifferent | GK107-300-A2 | Malta XT(215-0849026) |
| 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 | 11.8M / mm² |
| Die SizeDifferent | 118 mm² | 365 mm² |
| Chip PackageDifferent | BGA-908 | N/A |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Apr 24th, 2013 |
| 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 | 999 USD |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| ReviewsDifferent | 8 in our database | 37 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | N/A |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 1500 MHz6 Gbps effective |
| Base ClockDifferent | N/A | 950 MHz |
| Boost ClockDifferent | N/A | 1000 MHz |
Memory
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 3 GB |
| Memory TypeDifferent | DDR3 | GDDR5 |
| Memory BusDifferent | 128 bit | 384 bit |
| BandwidthDifferent | 28.51 GB/s | 288.0 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| 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 7990 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 32.00 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 128.0 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 4.096 TFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | 1,024.0 GFLOPS (1:4) |
Board Design
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| Slot WidthDifferent | Single-slot | Dual-slot |
| LengthDifferent | 145 mm5.7 inches | 304 mm12 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-C47637-00A_02 |
| HeightDifferent | N/A | 106 mm4.2 inches |
| WidthDifferent | N/A | 38 mm1.5 inches |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 7990 |
|---|---|---|
| DirectXDifferent | 12 (11_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCLDifferent | 3.0 | 2.1 (1.2) |
| Vulkan | 1.2.175 | 1.2.175 |
| CUDADifferent | 3.0 | N/A |
| Shader Model | 6.5 (5.1) | 6.5 (5.1) |
Comparison Summary
7
Specifications Compared
8
Feature Categories
51
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 7990
Compare AMD Radeon HD 7990 with other GPUs of similar performance
AMD Radeon HD 7990 vs Radeon RX 590
Radeon RX 590 Performance115%
Radeon RX 590 is 15% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon R9 FURY
Radeon R9 FURY Performance112%
Radeon R9 FURY is 12% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs GeForce GTX 980
GeForce GTX 980 Performance111%
GeForce GTX 980 is 11% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs GeForce GTX 1650 SUPER
GeForce GTX 1650 SUPER Performance110%
GeForce GTX 1650 SUPER is 10% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon RX 6500 XT
Radeon RX 6500 XT Performance109%
Radeon RX 6500 XT is 9% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon RX 5500 XT
Radeon RX 5500 XT Performance108%
Radeon RX 5500 XT is 8% faster than AMD Radeon HD 7990
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