ATI Mobility Radeon HD 3870 vs NVIDIA GeForce 9800M GS
Graphics Processor
| GPU model | M88 | G94 |
|---|---|---|
| Architecture | TeraScale | Tesla |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 65 nm |
| Number of transistors | 666 million | 505 million |
| Die size | 192 mm² | 240 mm² |
| GPU variant | — | NB9E-GS1 |
Mobile graphics
| Release date | Jun 4th, 2008 | Nov 1st, 2008 |
|---|---|---|
| Generation | M8x (Mobility HD 3800) | GeForce 9M (9800M) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 2 in our database | — |
| Predecessor | M7x | GeForce 8M |
| Successor | M9x | GeForce 100M |
Clocks
| GPU clock | 660 MHz | 530 MHz |
|---|---|---|
| Memory clock | 850 MHz 1700 Mbps effective | 800 MHz 1600 Mbps effective |
| Shader clock | — | 1325 MHz |
Memory Configuration
| Memory size | 512 MB | 512 MB |
|---|---|---|
| Memory type | GDDR3 | GDDR3 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 54.40 GB/s | 51.20 GB/s |
Render Configuration
| Shading units | 320 | 64 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 16 | 16 |
| Compute units | 4 | — |
| Cache L2 | 256 KB | 64 KB |
| SM count | — | 8 |
Performance
| Pixel rate | 10.56 GPixel/s | 8.480 GPixel/s |
|---|---|---|
| Texture rate | 10.56 GTexel/s | 16.96 GTexel/s |
| FP32 (float) performance | 422.4 GFLOPS | 169.6 GFLOPS |
| FP64 (double) performance | 84.48 GFLOPS (1:5) | — |
Dimensions & Outputs
| TDP | 55 W | 60 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Power connectors | — | None |
| Board number | — | P610 |
API Support & Features
| DirectX | 10.1 (10_1) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | — | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.0 |
| CUDA | — | 1.1 |
