NVIDIA GeForce GTX 660M Mac vs AMD Radeon HD 6770M Mac MXM Full Specs
384 Shaders 950MHz | 480 Shaders 675MHz |
512MB GDDR580GB/s | 512MB GDDR550.8GB/s |
·· 729.6 GFLOPS | ·· 648 GFLOPS |
Form Factor Soldered | Form Factor MXM-A |
TDP 50W | TDP 35W |
Clock Speed ·· | Clock Speed ·· |
Peak OPS 729.6 GFLOPSFP32 | Peak OPS 648 GFLOPSFP32 |
FP32 729.6 GFLOPS | FP32 648 GFLOPS |
FP64 30.4 GFLOPS | - |
Pixel Rate 15.2 GPixel/s | Pixel Rate 5.4 GPixel/s |
Texture Rate 30.4 GTexel/s | Texture Rate 16.2 GTexel/s |
Shaders 384 Shaders | Shaders 480 Shaders |
TMUs 32 TMUs | TMUs 24 TMUs |
ROPs 16 ROPs | ROPs 8 ROPs |
SMs 2 SMs | CUs 6 CUs |
Boost Clock 950MHz | Boost Clock 675MHz |
L2 Cache 256KB shared | L2 Cache 256KB shared |
512MB GDDR5 | 512MB GDDR5 |
Memory Bus 128-bit | Memory Bus 128-bit |
Memory Speed 5GT/s | Memory Speed 3.2GT/s |
Memory Bandwidth 80GB/s | Memory Bandwidth 50.8GB/s |
ECC No | ECC No |
TDP 50W | TDP 35W |
Multi-Monitor 2 | Multi-Monitor 2 |
Encoder Model NVENC 1 | - |
Codec AVC (H.264) | Codec - |
Decoder Model NVDEC 1 | Decoder Model UVD 3.0 |
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 MXM-A |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename NVE7 | Codename Turks |
Chip Variant - | Chip Variant Turks Pro |
Market Segment Laptop | Market Segment Laptop |
Release Date Mar 22, 2012 | Release Date Jan 4, 2011 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 28nm | Fabrication Node 40nm |
Die Size 118mm² | Die Size 118mm² |
Transistor Count 1.3 Billion | Transistor Count 716 Million |
Transistor Density 10.76 MTr/mm² | Transistor Density 6.07 MTr/mm² |