GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
265%
265%
AMD Radeon HD 6450
38%
38%
NVIDIA GeForce GT 640 is approximately 227% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | Caicos |
| CoresDifferent | 384 | 160 |
| TMUsDifferent | 32 | 8 |
| ROPsDifferent | 16 | 4 |
| Memory SizeDifferent | 2 GB | 512 MB |
| Memory TypeDifferent | DDR3 | GDDR3 |
| Bus WidthDifferent | 128 bit | 64 bit |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| GPU NameDifferent | GK107 | Caicos |
| GPU VariantDifferent | GK107-300-A2 | Caicos PRO |
| ArchitectureDifferent | Kepler | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 1,270 million | 370 million |
| DensityDifferent | 10.8M / mm² | 5.5M / mm² |
| Die SizeDifferent | 118 mm² | 67 mm² |
| Chip PackageDifferent | BGA-908 | FCBGA-631 |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Apr 7th, 2011 |
| GenerationDifferent | GeForce 600 | Northern Islands(HD 6400) |
| PredecessorDifferent | GeForce 500 | Evergreen |
| SuccessorDifferent | GeForce 700 | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 99 USD | 55 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 8 in our database | 14 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | 625 MHz |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 500 MHz1000 Mbps effective |
Memory
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 512 MB |
| Memory TypeDifferent | DDR3 | GDDR3 |
| Memory BusDifferent | 128 bit | 64 bit |
| BandwidthDifferent | 28.51 GB/s | 8.000 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Shading UnitsDifferent | 384 | 160 |
| TMUsDifferent | 32 | 8 |
| ROPsDifferent | 16 | 4 |
| SMX CountDifferent | 2 | N/A |
| L1 CacheDifferent | 16 KB (per SMX) | 8 KB (per CU) |
| L2 CacheDifferent | 256 KB | 128 KB |
| Compute UnitsDifferent | N/A | 2 |
Theoretical Performance
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 2.500 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 5.000 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 200.0 GFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | N/A |
Board Design
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| Slot Width | Single-slot | Single-slot |
| LengthDifferent | 145 mm5.7 inches | 168 mm6.6 inches |
| TDPDifferent | 65 W | 18 W |
| Suggested PSUDifferent | 250 W | 200 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 1x DVI1x HDMI 1.3a1x VGA |
| Power Connectors | None | None |
| Board NumberDifferent | P2011 SKU 0 | 109-C26037-00A |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | AMD Radeon HD 6450 |
|---|---|---|
| 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
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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 6450
Compare AMD Radeon HD 6450 with other GPUs of similar performance
AMD Radeon HD 6450 vs GeForce GT 520
GeForce GT 520 Performance106%
GeForce GT 520 is 6% faster than AMD Radeon HD 6450
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AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
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AMD Radeon HD 6450 vs Radeon HD 5450
Radeon HD 5450 Performance85%
Radeon HD 5450 is 15% slower than AMD Radeon HD 6450
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AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
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AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
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