AMD Radeon HD 8850M vs ATI Radeon HD 3850
Graphics Processor
| GPU model | Venus | RV670 |
|---|---|---|
| GPU variant | Venus PRO | RV670 PRO (215-0708003) |
| Architecture | GCN 1.0 | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 55 nm |
| Number of transistors | 1,500 million | 666 million |
| Die size | 123 mm² | 192 mm² |
Mobile graphics
| Release date | Apr 1st, 2013 | — |
|---|---|---|
| Generation | Solar System (HD 8800M) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | London | — |
| Successor | Crystal System | — |
Clocks
| Base clock | 575 MHz | — |
|---|---|---|
| Boost clock | 625 MHz | — |
| Memory clock | 1000 MHz 2 Gbps effective | 830 MHz 1660 Mbps effective |
| GPU clock | — | 668 MHz |
Memory Configuration
| Memory size | 2 GB | 512 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 32.00 GB/s | 53.12 GB/s |
Render Configuration
| Shading units | 640 | 320 |
|---|---|---|
| TMUs | 40 | 16 |
| ROPs | 16 | 16 |
| Compute units | 10 | 4 |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 10.00 GPixel/s | 10.69 GPixel/s |
|---|---|---|
| Texture rate | 25.00 GTexel/s | 10.69 GTexel/s |
| FP32 (float) performance | 800.0 GFLOPS | 427.5 GFLOPS |
| FP64 (double) performance | 50.00 GFLOPS (1:16) | 85.50 GFLOPS (1:5) |
Dimensions & Outputs
| TDP | unknown | 75 W |
|---|---|---|
| Outputs | No outputs | 2x DVI1x S-Video |
| Slot width | — | Single-slot |
| Length | — | 208 mm 8.2 inches |
| Suggested PSU | — | 250 W |
| Power connectors | — | 1x 6-pin |
| Board number | — | B340, B400 |
API Support & Features
| DirectX | 12 (11_1) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.6 | 3.3 (full) 4.0 (partial) |
| OpenCL | 1.2 | — |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | 4.1 |
Other Features
Graphics Card
| Release date | — | Nov 19th, 2007 |
|---|---|---|
| Generation | — | Radeon R600 |
| Production | — | End-of-life |
| Launch price | — | 179 USD |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 71 in our database |
| Predecessor | — | Radeon R500 PCIe |
| Successor | — | Radeon R700 |
