NVIDIA GeForce GT 640M Mac vs NVIDIA GeForce GTX 660M Mac Full Specs
384 Shaders 625MHz | 384 Shaders 950MHz |
512MB GDDR564GB/s | 512MB GDDR580GB/s |
·· 480 GFLOPS | ·· 729.6 GFLOPS |
Form Factor Soldered | Form Factor Soldered |
TDP 32W | TDP 50W |
Clock Speed ·· | Clock Speed ·· |
Peak OPS 480 GFLOPSFP32 | Peak OPS 729.6 GFLOPSFP32 |
FP32 480 GFLOPS | FP32 729.6 GFLOPS |
FP64 20 GFLOPS | FP64 30.4 GFLOPS |
Pixel Rate 10 GPixel/s | Pixel Rate 15.2 GPixel/s |
Texture Rate 20 GTexel/s | Texture Rate 30.4 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 625MHz | Boost Clock 950MHz |
L2 Cache 256KB shared | L2 Cache 256KB shared |
512MB GDDR5 | 512MB GDDR5 |
Memory Bus 128-bit | Memory Bus 128-bit |
Memory Speed 4GT/s | Memory Speed 5GT/s |
Memory Bandwidth 64GB/s | Memory Bandwidth 80GB/s |
ECC No | ECC No |
TDP 32W | TDP 50W |
Multi-Monitor 3 | Multi-Monitor 2 |
Encoder Model NVENC 1 | Encoder Model NVENC 1 |
Codec AVC (H.264) | Codec AVC (H.264) |
Decoder Model NVDEC 1 | Decoder Model NVDEC 1 |
Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) | Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) |
Form Factor Soldered | Form Factor Soldered |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding |
Codename NVE7 | Codename NVE7 |
Market Segment Laptop | Market Segment Laptop |
Release Date Mar 22, 2012 | Release Date Mar 22, 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 |