NVIDIA GeForce 8800 GTS 640 vs NVIDIA GeForce GT 720
Graphics Processor
| GPU model | G80 | GK208 |
|---|---|---|
| GPU variant | G80-100-K0-A2 | GK208-320-A1 |
| Architecture | Tesla | Kepler 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 90 nm | 28 nm |
| Number of transistors | 681 million | 1,020 million |
| Die size | 484 mm² | 87 mm² |
Graphics Card
| Release date | Nov 8th, 2006 | Mar 27th, 2014 |
|---|---|---|
| Generation | GeForce 8 | GeForce 700 |
| Production | End-of-life | End-of-life |
| Launch price | 449 USD | 49 USD |
| Interface | PCIe 1.0 x16 | PCIe 2.0 x8 |
| Reviews | 403 in our database | — |
| Predecessor | GeForce 7 PCIe | GeForce 600 |
| Successor | GeForce 9 | GeForce 900 |
Clocks
| GPU clock | 513 MHz | 967 MHz |
|---|---|---|
| Shader clock | 1188 MHz | — |
| Memory clock | 792 MHz 1584 Mbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 640 MB | 2 GB |
|---|---|---|
| Memory type | GDDR3 | DDR3 |
| Memory bus width | 320 bit | 64 bit |
| Bandwidth | 63.36 GB/s | 14.40 GB/s |
Render Configuration
| Shading units | 96 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 20 | 8 |
| SM count | 12 | — |
| Cache L2 | 80 KB | 512 KB |
| SMX count | — | 2 |
| Cache L1 | — | 16 KB (per SMX) |
Performance
| Pixel rate | 10.26 GPixel/s | 7.736 GPixel/s |
|---|---|---|
| Texture rate | 24.62 GTexel/s | 30.94 GTexel/s |
| FP32 (float) performance | 228.1 GFLOPS | 742.7 GFLOPS |
| FP64 (double) performance | — | 30.94 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 267 mm 10.5 inches | 145 mm 5.7 inches |
| TDP | 143 W | 19 W |
| Suggested PSU | 300 W | 200 W |
| Outputs | 2x DVI1x S-Video | 1x DVI1x HDMI1x VGA |
| Power connectors | 1x 6-pin | None |
| Board number | P356 | P2130 SKU 4 |
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 | 3.5 |
| Shader model | 4.0 | 5.1 |
