ATI Mobility Radeon HD 3850 vs ATI Radeon X850 XT AGP
Graphics Processor
| GPU model | M88 | R481 |
|---|---|---|
| Architecture | TeraScale | R400 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 130 nm |
| Number of transistors | 666 million | 160 million |
| Die size | 192 mm² | 297 mm² |
| GPU variant | — | R481 XT (215RAFCGA11F) |
Mobile graphics
| Release date | Jun 4th, 2008 | — |
|---|---|---|
| Generation | M8x (Mobility HD 3800) | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 2 in our database | — |
| Predecessor | M7x | — |
| Successor | M9x | — |
Clocks
| GPU clock | 580 MHz | 520 MHz |
|---|---|---|
| Memory clock | 750 MHz 1500 Mbps effective | 540 MHz 1080 Mbps effective |
Memory Configuration
| Memory size | 512 MB | 256 MB |
|---|---|---|
| Memory type | GDDR3 | GDDR3 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 48.00 GB/s | 34.56 GB/s |
Render Configuration
| Shading units | 320 | — |
|---|---|---|
| TMUs | 16 | 16 |
| ROPs | 16 | 16 |
| Compute units | 4 | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 16 |
| Vertex shaders | — | 6 |
Performance
| Pixel rate | 9.280 GPixel/s | 8.320 GPixel/s |
|---|---|---|
| Texture rate | 9.280 GTexel/s | 8.320 GTexel/s |
| FP32 (float) performance | 371.2 GFLOPS | — |
| FP64 (double) performance | 74.24 GFLOPS (1:5) | — |
| Vertex rate | — | 780.0 MVertices/s |
Dimensions & Outputs
| TDP | 35 W | 69 W |
|---|---|---|
| Outputs | No outputs | 1x DVI1x VGA1x S-Video |
| Slot width | — | Dual-slot |
| Suggested PSU | — | 250 W |
| Power connectors | — | 1x Molex |
API Support & Features
| DirectX | 10.1 (10_1) | 9.0b (9_2) |
|---|---|---|
| OpenGL | 3.3 | 2.1 |
| OpenCL | — | — |
| Vulkan | — | — |
| Shader model | 4.1 | — |
| Pixel shader | — | 2.0b |
| Vertex shader | — | 2.0b |
Other Features
Graphics Card
| Release date | — | Feb 28th, 2005 |
|---|---|---|
| Generation | — | Radeon R400 AGP |
| Production | — | End-of-life |
| Interface | — | AGP 8x |
| Reviews | — | 58 in our database |
| Predecessor | — | Radeon R300 |
| Successor | — | Radeon R500 AGP |
