NVIDIA GeForce 7900 GT vs NVIDIA GeForce GTX 850M
Graphics Processor
| GPU model | G71 | GM107 |
|---|---|---|
| GPU variant | G71-GT-N-A2 | N15P-GT-A1 |
| Architecture | Curie | Maxwell |
| Foundry | TSMC | TSMC |
| Manufacturing process | 90 nm | 28 nm |
| Number of transistors | 278 million | 1,870 million |
| Die size | 196 mm² | 148 mm² |
Graphics Card
| Release date | Mar 9th, 2006 | — |
|---|---|---|
| Generation | GeForce 7 PCIe | — |
| Production | End-of-life | — |
| Interface | PCIe 1.0 x16 | — |
| Reviews | 145 in our database | — |
| Predecessor | GeForce 6 PCIe | — |
| Successor | GeForce 8 | — |
Clocks
| GPU clock | 450 MHz | 902 MHz |
|---|---|---|
| Memory clock | 660 MHz 1320 Mbps effective | 1001 MHz 2 Gbps effective |
Memory Configuration
| Memory size | 256 MB | 2 GB |
|---|---|---|
| Memory type | GDDR3 | DDR3 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 42.24 GB/s | 32.03 GB/s |
Render Configuration
| Pixel shaders | 24 | — |
|---|---|---|
| Vertex shaders | 8 | — |
| TMUs | 24 | 40 |
| ROPs | 16 | 16 |
| Shading units | — | 640 |
| SMM count | — | 5 |
| Cache L1 | — | 64 KB (per SMM) |
| Cache L2 | — | 2 MB |
Performance
| Pixel rate | 7.200 GPixel/s | 14.43 GPixel/s |
|---|---|---|
| Vertex rate | 900.0 MVertices/s | — |
| Texture rate | 10.80 GTexel/s | 36.08 GTexel/s |
| FP32 (float) performance | — | 1,155 GFLOPS |
| FP64 (double) performance | — | 36.08 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | Single-slot | IGP |
|---|---|---|
| TDP | 48 W | 45 W |
| Suggested PSU | 200 W | — |
| Outputs | 2x DVI1x S-Video | No outputs |
| Power connectors | 1x 6-pin | — |
| Board number | P455 | — |
API Support & Features
| DirectX | 9.0c (9_3) | 12 (11_0) |
|---|---|---|
| OpenGL | 2.1 | 4.6 |
| OpenCL | — | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 3.0 | 5.1 |
| CUDA | — | 5.0 |
Other Features
Mobile graphics
| Release date | — | Mar 12th, 2014 |
|---|---|---|
| Generation | — | GeForce 800M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 700M |
| Successor | — | GeForce 900M |
