NVIDIA GeForce GT 620 vs NVIDIA GeForce GT 640 GDDR5 Full Specs
48 Shaders 810MHz | 384 Shaders 950MHz |
524MB DDR314.4GB/s | 1GB GDDR580GB/s |
·· 155.5 GFLOPS | ·· 729.6 GFLOPS |
Form Factor PCIe Card | Form Factor PCIe Card |
TDP 30W | TDP 75W |
GeForce GT 620155.5 GFLOPSFP32
GeForce GT 640 GDDR5729.6 GFLOPSFP32Clock Speed ·· | Clock Speed ·· |
Peak OPS 155.5 GFLOPSFP32 | Peak OPS 729.6 GFLOPSFP32 |
FP32 155.5 GFLOPS | FP32 729.6 GFLOPS |
FP64 12.96 GFLOPS | FP64 30.4 GFLOPS |
Pixel Rate 6.5 GPixel/s | Pixel Rate 15.2 GPixel/s |
Texture Rate 13 GTexel/s | Texture Rate 30.4 GTexel/s |
Shaders 48 Shaders | Shaders 384 Shaders |
TMUs 8 TMUs | TMUs 32 TMUs |
ROPs 4 ROPs | ROPs 16 ROPs |
SM 1 SM | SMs 2 SMs |
Boost Clock 810MHz | Boost Clock 950MHz |
Shader Clock 1.62GHz | Shader Clock - |
L2 Cache 128KB shared | L2 Cache 256KB shared |
524MB DDR3 | 1GB GDDR5 |
Memory Bus 64-bit | Memory Bus 128-bit |
Memory Speed 1.8GT/s | Memory Speed 5GT/s |
Memory Bandwidth 14.4GB/s | Memory Bandwidth 80GB/s |
TDP 30W | TDP 75W |
Multi-Monitor 2 | Multi-Monitor 2 |
- | 1x HDMI 1.4 |
1x HDMI 1.3 | - |
1x DVI-I Dual-Link | 1x DVI-I Dual-Link |
1x VGA | 1x VGA |
- | Encoder Model NVENC 1 |
Decoder Model VP5 | Decoder Model NVDEC 1 |
Form Factor PCIe Card | Form Factor PCIe Card |
PCIe 1-Slots | PCIe 1.5-Slots |
Height 69 mm (2.72")Width 145 mm (5.71")Depth 20 mm (0.79") | Height 111 mm (4.37")Width 145 mm (5.71")Depth 30 mm (1.18") |
Cooling Open-Air 1x Fan | Cooling Open-Air 1x Fan |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding |
Codename NVD9 | Codename NVE7 |
Market Segment Desktop | Market Segment Desktop |
Release Date Apr 3, 2012 | Release Date Apr 24, 2012 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 40nm | Fabrication Node 28nm |
Die Size 79mm² | Die Size 118mm² |
Transistor Count 292 Million | Transistor Count 1.3 Billion |
Transistor Density 3.7 MTr/mm² | Transistor Density 10.76 MTr/mm² |
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