NVIDIA GeForce 8400M GS vs NVIDIA GeForce Go 7800
Graphics Processor
| GPU model | G86 | G70 |
|---|---|---|
| GPU variant | NB8M-GS | — |
| Architecture | Tesla | Curie |
| Foundry | TSMC | TSMC |
| Manufacturing process | 80 nm | 110 nm |
| Number of transistors | 210 million | 302 million |
| Die size | 127 mm² | 333 mm² |
Mobile graphics
| Release date | May 9th, 2007 | Mar 3rd, 2006 |
|---|---|---|
| Generation | GeForce 8M (8000M) | GeForce Go 7 (Go 7000) |
| Production | End-of-life | End-of-life |
| Interface | MXM-I | PCIe 1.0 x16 |
| Predecessor | GeForce Go 7 | GeForce Go 6 |
| Successor | GeForce 9M | GeForce 8M |
Clocks
| GPU clock | 400 MHz | 400 MHz |
|---|---|---|
| Shader clock | 800 MHz | — |
| Memory clock | 400 MHz 800 Mbps effective | 550 MHz 1100 Mbps effective |
Memory Configuration
| Memory size | 256 MB | 256 MB |
|---|---|---|
| Memory type | DDR2 | GDDR3 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 6.400 GB/s | 35.20 GB/s |
Render Configuration
| Shading units | 16 | — |
|---|---|---|
| TMUs | 8 | 16 |
| ROPs | 4 | 16 |
| SM count | 2 | — |
| Cache L2 | 16 KB | — |
| Pixel shaders | — | 16 |
| Vertex shaders | — | 6 |
Performance
| Pixel rate | 1.600 GPixel/s | 6.400 GPixel/s |
|---|---|---|
| Texture rate | 3.200 GTexel/s | 6.400 GTexel/s |
| FP32 (float) performance | 25.60 GFLOPS | — |
| Vertex rate | — | 600.0 MVertices/s |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 11 W | 35 W |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 11.1 (10_0) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 | 2.1 |
| OpenCL | 1.1 | — |
| Vulkan | — | — |
| CUDA | 1.1 | — |
| Shader model | 4.0 | 3.0 |
