NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 640 1GB Full Specs
384 Shaders 900MHz | 384 Shaders 797MHz |
2GB DDR328.5GB/s | 1GB DDR328.5GB/s |
·· 691.2 GFLOPS | ·· 612.1 GFLOPS |
Form Factor PCIe Card | Form Factor PCIe Card |
TDP 65W | TDP 50W |
GeForce GT 640691.2 GFLOPSFP32
GeForce GT 640 1GB612.1 GFLOPSFP32Clock Speed ·· | Clock Speed ·· |
Peak OPS 691.2 GFLOPSFP32 | Peak OPS 612.1 GFLOPSFP32 |
FP32 691.2 GFLOPS | FP32 612.1 GFLOPS |
FP64 28.8 GFLOPS | FP64 25.5 GFLOPS |
Pixel Rate 14.4 GPixel/s | Pixel Rate 12.8 GPixel/s |
Texture Rate 28.8 GTexel/s | Texture Rate 25.5 GTexel/s |
Shaders 384 Shaders | Shaders 384 Shaders |
TMUs 32 TMUs | TMUs 32 TMUs |
ROPs 16 ROPs | ROPs 16 ROPs |
SMs 2 SMs | SMs 2 SMs |
Boost Clock 900MHz | Boost Clock 797MHz |
L2 Cache 256KB shared | L2 Cache 256KB shared |
2GB DDR3 | 1GB DDR3 |
Memory Bus 128-bit | Memory Bus 128-bit |
Memory Speed 1.8GT/s | Memory Speed 1.8GT/s |
Memory Bandwidth 28.5GB/s | Memory Bandwidth 28.5GB/s |
TDP 65W | TDP 50W |
Multi-Monitor 2 | Multi-Monitor 2 |
1x HDMI 1.4 | 1x HDMI 1.4 |
1x DVI-I Dual-Link | 1x DVI-I Dual-Link |
1x VGA | 1x VGA |
Encoder Model NVENC 1 | Encoder Model NVENC 1 |
Decoder Model NVDEC 1 | Decoder Model NVDEC 1 |
Form Factor PCIe Card | Form Factor PCIe Card |
PCIe 1.5-Slots | PCIe 1.5-Slots |
Height 111 mm (4.37")Width 145 mm (5.71")Depth 30 mm (1.18") | 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 NVE7 | Codename NVE7 |
Market Segment Desktop | Market Segment Desktop |
Release Date Jun 5, 2012 | Release Date Apr 24, 2012 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 28nm | Fabrication Node 28nm |
Die Size 118mm² | Die Size 118mm² |
Transistor Count 1.3 Billion | Transistor Count 1.3 Billion |
Transistor Density 10.76 MTr/mm² | Transistor Density 10.76 MTr/mm² |
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