GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GT 640
90%
90%
ATI Radeon HD 4830
111%
111%
ATI Radeon HD 4830 is approximately 21% faster
Technical Specifications
| Specification | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Graphics ProcessorDifferent | GK107 | RV770 |
| CoresDifferent | 384 | 640 |
| TMUs | 32 | 32 |
| ROPs | 16 | 16 |
| Memory SizeDifferent | 2 GB | 512 MB |
| Memory TypeDifferent | DDR3 | GDDR3 |
| Bus WidthDifferent | 128 bit | 256 bit |
Graphics Processor
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| GPU NameDifferent | GK107 | RV770 |
| GPU VariantDifferent | GK107-300-A2 | RV770 LE(215-0669075) |
| ArchitectureDifferent | Kepler | TeraScale |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 55 nm |
| TransistorsDifferent | 1,270 million | 956 million |
| DensityDifferent | 10.8M / mm² | 3.7M / mm² |
| Die SizeDifferent | 118 mm² | 256 mm² |
| Chip PackageDifferent | BGA-908 | HFCBGA-1492 |
Graphics Card
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Release DateDifferent | Jun 5th, 2012 | Oct 21st, 2008 |
| GenerationDifferent | GeForce 600 | Radeon R700(HD 4800) |
| PredecessorDifferent | GeForce 500 | Radeon R600 |
| SuccessorDifferent | GeForce 700 | Evergreen |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 99 USD | 130 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 8 in our database | 43 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| GPU ClockDifferent | 902 MHz | 575 MHz |
| Memory ClockDifferent | 891 MHz1782 Mbps effective | 900 MHz1800 Mbps effective |
Memory
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 512 MB |
| Memory TypeDifferent | DDR3 | GDDR3 |
| Memory BusDifferent | 128 bit | 256 bit |
| BandwidthDifferent | 28.51 GB/s | 57.60 GB/s |
Render Config
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Shading UnitsDifferent | 384 | 640 |
| TMUs | 32 | 32 |
| ROPs | 16 | 16 |
| SMX CountDifferent | 2 | N/A |
| L1 CacheDifferent | 16 KB (per SMX) | 16 KB (per CU) |
| L2 Cache | 256 KB | 256 KB |
| Compute UnitsDifferent | N/A | 8 |
Theoretical Performance
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Pixel RateDifferent | 7.216 GPixel/s | 9.200 GPixel/s |
| Texture RateDifferent | 28.86 GTexel/s | 18.40 GTexel/s |
| FP32 (float)Different | 692.7 GFLOPS | 736.0 GFLOPS |
| FP64 (double)Different | 28.86 GFLOPS (1:24) | 147.2 GFLOPS (1:5) |
Board Design
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| Slot Width | Single-slot | Single-slot |
| LengthDifferent | 145 mm5.7 inches | 246 mm9.7 inches |
| TDPDifferent | 65 W | 95 W |
| Suggested PSU | 250 W | 250 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 2x DVI1x S-Video |
| Power ConnectorsDifferent | None | 1x 6-pin |
| Board NumberDifferent | P2011 SKU 0 | 109-B50131-10 |
| HeightDifferent | N/A | 111 mm4.4 inches |
| WidthDifferent | N/A | 20 mm0.8 inches |
Graphics Features
| Feature | NVIDIA GeForce GT 640 | ATI Radeon HD 4830 |
|---|---|---|
| DirectXDifferent | 12 (11_0) | 10.1 (10_1) |
| OpenGLDifferent | 4.6 | 3.3 |
| OpenCLDifferent | 3.0 | 1.1 |
| VulkanDifferent | 1.2.175 | N/A |
| CUDADifferent | 3.0 | N/A |
| Shader ModelDifferent | 6.5 (5.1) | 4.1 |
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
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
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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
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 ATI Radeon HD 4830
Compare ATI Radeon HD 4830 with other GPUs of similar performance
ATI Radeon HD 4830 vs GeForce GTS 450
GeForce GTS 450 Performance118%
GeForce GTS 450 is 18% faster than ATI Radeon HD 4830
Compare Detailed Specs
ATI Radeon HD 4830 vs GeForce GTS 250
GeForce GTS 250 Performance115%
GeForce GTS 250 is 15% faster than ATI Radeon HD 4830
Compare Detailed Specs
ATI Radeon HD 4830 vs Radeon HD 4850
Radeon HD 4850 Performance112%
Radeon HD 4850 is 12% faster than ATI Radeon HD 4830
Compare Detailed Specs
ATI Radeon HD 4830 vs Radeon HD 4770
Radeon HD 4770 Performance107%
Radeon HD 4770 is 7% faster than ATI Radeon HD 4830
Compare Detailed Specs
ATI Radeon HD 4830 vs Radeon HD 4830
Radeon HD 4830 Performance100%
Radeon HD 4830 is 0% slower than ATI Radeon HD 4830
Compare Detailed Specs
ATI Radeon HD 4830 vs Radeon HD 6670
Radeon HD 6670 Performance97%
Radeon HD 6670 is 3% slower than ATI Radeon HD 4830
Compare Detailed Specs