NVIDIA GeForce 8800 Ultra vs NVIDIA GeForce GT 640M
Graphics Processor
| GPU model | G80 | GK107 |
|---|---|---|
| GPU variant | G80-450-A3 | N13P-GS |
| Architecture | Tesla | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 90 nm | 28 nm |
| Number of transistors | 681 million | 1,270 million |
| Die size | 484 mm² | 118 mm² |
Graphics Card
| Release date | May 2nd, 2007 | — |
|---|---|---|
| Generation | GeForce 8 | — |
| Production | End-of-life | — |
| Launch price | 829 USD | — |
| Interface | PCIe 1.0 x16 | — |
| Reviews | 403 in our database | — |
| Predecessor | GeForce 7 PCIe | — |
| Successor | GeForce 9 | — |
Clocks
| GPU clock | 612 MHz | 625 MHz |
|---|---|---|
| Shader clock | 1512 MHz | — |
| Memory clock | 1080 MHz 2.2 Gbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 768 MB | 2 GB |
|---|---|---|
| Memory type | GDDR3 | DDR3 |
| Memory bus width | 384 bit | 128 bit |
| Bandwidth | 103.7 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 128 | 384 |
|---|---|---|
| TMUs | 32 | 32 |
| ROPs | 24 | 16 |
| SM count | 16 | — |
| Cache L2 | 96 KB | 256 KB |
| SMX count | — | 2 |
| Cache L1 | — | 16 KB (per SMX) |
Performance
| Pixel rate | 14.69 GPixel/s | 5.000 GPixel/s |
|---|---|---|
| Texture rate | 39.17 GTexel/s | 20.00 GTexel/s |
| FP32 (float) performance | 387.1 GFLOPS | 480.0 GFLOPS |
| FP64 (double) performance | — | 20.00 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | — |
|---|---|---|
| Length | 270 mm 10.6 inches | — |
| TDP | 171 W | 32 W |
| Suggested PSU | 450 W | — |
| Outputs | 2x DVI1x S-Video | No outputs |
| Power connectors | 2x 6-pin | — |
| Board number | P355 | — |
API Support & Features
| DirectX | 11.1 (10_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 (1.0) | 3.0 |
| Vulkan | — | 1.1 |
| CUDA | 1.0 | 3.0 |
| Shader model | 4.0 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Mar 22nd, 2012 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Reviews | — | 2 in our database |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
