NVIDIA GeForce GT 640M Mac vs AMD Radeon R9 M290 Full Specs
384 Shaders 625MHz | 1,024 Shaders 975MHz |
512MB GDDR564GB/s | 4GB GDDR5174.7GB/s |
·· 480 GFLOPS | ·· 2 TFLOPS |
Form Factor Soldered | Form Factor Soldered |
TDP 32W | TDP 80W |
Clock Speed ·· | Clock Speed ··· |
Peak OPS 480 GFLOPSFP32 | Peak OPS 2 TFLOPSFP32 |
FP32 480 GFLOPS | FP32 2 TFLOPS |
FP64 20 GFLOPS | FP64 124.8 GFLOPS |
Pixel Rate 10 GPixel/s | Pixel Rate 31.2 GPixel/s |
Texture Rate 20 GTexel/s | Texture Rate 62.4 GTexel/s |
Shaders 384 Shaders | Shaders 1,024 Shaders |
TMUs 32 TMUs | TMUs 64 TMUs |
ROPs 16 ROPs | ROPs 32 ROPs |
SMs 2 SMs | CUs 16 CUs |
Base Clock - | Base Clock 850MHz |
Boost Clock 625MHz | Boost Clock 975MHz |
L2 Cache 256KB shared | L2 Cache 512KB shared |
512MB GDDR5 | 4GB GDDR5 |
Memory Bus 128-bit | Memory Bus 256-bit |
Memory Speed 4GT/s | Memory Speed 5.5GT/s |
Memory Bandwidth 64GB/s | Memory Bandwidth 174.7GB/s |
ECC No | ECC No |
TDP 32W | TDP 80W |
Multi-Monitor 3 | Multi-Monitor 3 |
Encoder Model NVENC 1 | Encoder Model VCE 1.0 |
Codec AVC (H.264) | Codec AVC (H.264) |
Decoder Model NVDEC 1 | Decoder Model UVD 4.0 |
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 Soldered |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename NVE7 | Codename Pitcairn |
Chip Variant - | Chip Variant Pitcairn Pro |
Market Segment Laptop | Market Segment Laptop |
Release Date Mar 22, 2012 | Release Date May 31, 2014 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 28nm | Fabrication Node 28nm |
Die Size 118mm² | Die Size 212mm² |
Transistor Count 1.3 Billion | Transistor Count 2.8 Billion |
Transistor Density 10.76 MTr/mm² | Transistor Density 13.21 MTr/mm² |