AMD Radeon HD 7650M vs ATI Radeon HD 3850 X3
Graphics Processor
| GPU model | Thames | RV670 |
|---|---|---|
| GPU variant | Thames PRO | RV670 PRO (215-0708003) |
| Architecture | TeraScale 2 | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 55 nm |
| Number of transistors | 716 million | 666 million |
| Die size | 104 mm² | 192 mm² |
Mobile graphics
| Release date | Jan 7th, 2012 | — |
|---|---|---|
| Generation | London (HD 7600M) | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Predecessor | Vancouver | — |
| Successor | Solar System | — |
Clocks
| GPU clock | 450 MHz | 669 MHz |
|---|---|---|
| Memory clock | 800 MHz 1600 Mbps effective | 850 MHz 1700 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 512 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 25.60 GB/s | 54.40 GB/s |
Render Configuration
| Shading units | 480 | 320 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 16 | 16 |
| Compute units | 6 | 4 |
| Cache L1 | 8 KB (per CU) | — |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 7.200 GPixel/s | 10.70 GPixel/s |
|---|---|---|
| Texture rate | 10.80 GTexel/s | 10.70 GTexel/s |
| FP32 (float) performance | 432.0 GFLOPS | 428.2 GFLOPS |
Dimensions & Outputs
| TDP | 20 W | 145 W |
|---|---|---|
| Outputs | No outputs | 4x DVI |
| Slot width | — | Dual-slot |
| Length | — | 292 mm 11.5 inches |
| Suggested PSU | — | 300 W |
| Power connectors | — | 1x 8-pin |
API Support & Features
| DirectX | 11.2 (11_0) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.4 | 3.3 (full) 4.0 (partial) |
| OpenCL | 1.2 | — |
| Vulkan | — | — |
| Shader model | 5.0 | 4.1 |
Other Features
Graphics Card
| Release date | — | Never Released |
|---|---|---|
| Generation | — | Radeon R600 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Predecessor | — | Radeon R500 PCIe |
| Successor | — | Radeon R700 |
