AMD Radeon HD 6630M Mac Edition vs NVIDIA GeForce GT 740A
Graphics Processor
| GPU model | Whistler | GK208 |
|---|---|---|
| GPU variant | Whistler LP | GT 740M |
| Architecture | TeraScale 2 | Kepler 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 716 million | 1,020 million |
| Die size | 104 mm² | 87 mm² |
Mobile graphics
| Release date | Jan 4th, 2011 | Aug 26th, 2013 |
|---|---|---|
| Generation | Vancouver (HD 6600M) | GeForce 700A |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Predecessor | Manhattan | GeForce 600A |
| Successor | London | GeForce 800A |
Clocks
| GPU clock | 500 MHz | 980 MHz |
|---|---|---|
| Memory clock | 600 MHz 2.4 Gbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 256 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 64 bit | 64 bit |
| Bandwidth | 19.20 GB/s | 14.40 GB/s |
Render Configuration
| Shading units | 480 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 8 | 8 |
| Compute units | 6 | — |
| SMX count | — | 2 |
| Cache L1 | — | 16 KB (per SMX) |
| Cache L2 | — | 512 KB |
Performance
| Pixel rate | 4.000 GPixel/s | 7.840 GPixel/s |
|---|---|---|
| Texture rate | 12.00 GTexel/s | 31.36 GTexel/s |
| FP32 (float) performance | 480.0 GFLOPS | 752.6 GFLOPS |
| FP64 (double) performance | — | 31.36 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | 26 W | 33 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 3.5 |
