AMD Radeon HD 6490M Mac Edition vs ATI Radeon HD 4670 X2
Graphics Processor
| GPU model | Seymour | RV730 |
|---|---|---|
| GPU variant | Seymour XTX (216-0810005) | RV730 XT (215-0719047) |
| Architecture | TeraScale 2 | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 55 nm |
| Number of transistors | 370 million | 514 million |
| Die size | 67 mm² | 146 mm² |
Mobile graphics
| Release date | May 2nd, 2011 | — |
|---|---|---|
| Generation | Vancouver (HD 6400M) | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Predecessor | Manhattan | — |
| Successor | London | — |
Clocks
| GPU clock | 750 MHz | 750 MHz |
|---|---|---|
| Memory clock | 794 MHz 3.2 Gbps effective | 700 MHz 1400 Mbps effective |
Memory Configuration
| Memory size | 256 MB | 512 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 25.41 GB/s | 22.40 GB/s |
Render Configuration
| Shading units | 160 | 320 |
|---|---|---|
| TMUs | 8 | 32 |
| ROPs | 4 | 8 |
| Compute units | 2 | 4 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 128 KB | 128 KB |
Performance
| Pixel rate | 3.000 GPixel/s | 6.000 GPixel/s |
|---|---|---|
| Texture rate | 6.000 GTexel/s | 24.00 GTexel/s |
| FP32 (float) performance | 240.0 GFLOPS | 480.0 GFLOPS |
Dimensions & Outputs
| TDP | unknown | 118 W |
|---|---|---|
| Outputs | No outputs | 4x DVI |
| Slot width | — | Dual-slot |
| Suggested PSU | — | 300 W |
| Power connectors | — | 1x 6-pin |
API Support & Features
| DirectX | 11.2 (11_0) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.4 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | — | — |
| Shader model | 5.0 | 4.1 |
Other Features
Graphics Card
| Release date | — | Sep 10th, 2008 |
|---|---|---|
| Generation | — | Radeon R700 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 49 in our database |
| Predecessor | — | Radeon R600 |
| Successor | — | Evergreen |
