NVIDIA GeForce GT 640 GF116 vs NVIDIA GeForce GTX 660 Ti Full Specs
144 Shaders 720MHz | 1,344 Shaders 1.06GHz |
2GB DDR342.8GB/s | 2GB GDDR596.1GB/s |
·· 414.7 GFLOPS | ·· 2.84 TFLOPS |
Form Factor PCIe Card | Form Factor PCIe Card |
TDP 75W | TDP 150W |
Power Connectors - | Power Connectors 2x 6-Pin |
GeForce GT 640 GF116414.7 GFLOPSFP32
GeForce GTX 660 Ti2.84 TFLOPSFP32Clock Speed ·· | Clock Speed ··· |
Peak OPS 414.7 GFLOPSFP32 | Peak OPS 2.84 TFLOPSFP32 |
FP32 414.7 GFLOPS | FP32 2.84 TFLOPS |
FP64 34.56 GFLOPS | FP64 118.5 GFLOPS |
Pixel Rate 34.6 GPixel/s | Pixel Rate 25.4 GPixel/s |
Texture Rate 34.6 GTexel/s | Texture Rate 118.5 GTexel/s |
Shaders 144 Shaders | Shaders 1,344 Shaders |
TMUs 24 TMUs | TMUs 112 TMUs |
ROPs 24 ROPs | ROPs 24 ROPs |
SMs 3 SMs | SMs 7 SMs |
Base Clock - | Base Clock 915MHz |
Boost Clock 720MHz | Boost Clock 1.06GHz |
Shader Clock 1.44GHz | Shader Clock - |
L2 Cache 384KB shared | L2 Cache 512KB shared |
2GB DDR3 | 2GB GDDR5 |
Memory Bus 192-bit | Memory Bus 128-bit |
Memory Speed 1.8GT/s | Memory Speed 6GT/s |
Memory Bandwidth 42.8GB/s | Memory Bandwidth 96.1GB/s |
ECC No | ECC No |
TDP 75W | TDP 150W |
Multi-Monitor 2 | Multi-Monitor 3 |
- | 1x DisplayPort 1.2 |
- | 1x HDMI 1.4 |
1x HDMI 1.3 | - |
- | 1x DVI-D Dual-Link |
1x DVI-I Dual-Link | 1x DVI-I Dual-Link |
1x VGA | - |
- | Encoder Model NVENC 1 |
Decoder Model VP4 | Decoder Model NVDEC 1 |
Form Factor PCIe Card | Form Factor PCIe Card |
PCIe 1.5-Slots | PCIe 2-Slots |
Height 111 mm (4.37")Width 145 mm (5.71")Depth 30 mm (1.18") | Height 111 mm (4.37")Width 241 mm (9.49")Depth 38 mm (1.5") |
Cooling Open-Air 1x Fan | Cooling Blower 1x Fan |
Power Connectors - | Power Connectors 2x 6-Pin |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding |
Codename NVCF | Codename NVE4 |
Chip Variant - | Chip Variant GK104-200-KD-A2 |
Market Segment Desktop | Market Segment Desktop |
Release Date Apr 24, 2012 | Release Date Aug 16, 2012 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 40nm | Fabrication Node 28nm |
Die Size 238mm² | Die Size 294mm² |
Transistor Count 1.2 Billion | Transistor Count 3.5 Billion |
Transistor Density 4.92 MTr/mm² | Transistor Density 12.04 MTr/mm² |
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