ATI Mobility Radeon HD 3850 X2 vs ATI Radeon HD 5550
Graphics Processor
| GPU model | M88 | Redwood |
|---|---|---|
| Architecture | TeraScale | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 40 nm |
| Number of transistors | 666 million | 627 million |
| Die size | 192 mm² | 104 mm² |
| GPU variant | — | Redwood PRO2 |
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 | 550 MHz |
|---|---|---|
| Memory clock | 750 MHz 1500 Mbps effective | 800 MHz 3.2 Gbps effective |
Memory Configuration
| Memory size | 512 MB | 512 MB |
|---|---|---|
| Memory type | GDDR3 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 48.00 GB/s | 51.20 GB/s |
Render Configuration
| Shading units | 320 | 320 |
|---|---|---|
| TMUs | 16 | 16 |
| ROPs | 16 | 8 |
| Compute units | 4 | 4 |
| Cache L2 | 256 KB | 256 KB |
| Cache L1 | — | 8 KB (per CU) |
Performance
| Pixel rate | 9.280 GPixel/s | 4.400 GPixel/s |
|---|---|---|
| Texture rate | 9.280 GTexel/s | 8.800 GTexel/s |
| FP32 (float) performance | 371.2 GFLOPS | 352.0 GFLOPS |
| FP64 (double) performance | 74.24 GFLOPS (1:5) | — |
Dimensions & Outputs
| TDP | 70 W | 39 W |
|---|---|---|
| Outputs | No outputs | 1x DVI1x HDMI1x VGA |
| Slot width | — | Single-slot |
| Length | — | 165 mm 6.5 inches |
| Suggested PSU | — | 200 W |
| Power connectors | — | None |
| Board number | — | C021, C025, C029 |
API Support & Features
| DirectX | 10.1 (10_1) | 11.2 (11_0) |
|---|---|---|
| OpenGL | 3.3 | 4.4 |
| OpenCL | — | 1.2 |
| Vulkan | — | — |
| Shader model | 4.1 | 5.0 |
Other Features
Graphics Card
| Release date | — | Feb 9th, 2010 |
|---|---|---|
| Generation | — | Evergreen |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 29 in our database |
| Predecessor | — | Radeon R700 |
| Successor | — | Northern Islands |
