AMD Radeon HD 6870 1600SP Edition vs NVIDIA GeForce 945M
Graphics Processor
| GPU model | Cypress | GM107 |
|---|---|---|
| GPU variant | Cypress XT (215-0735033) | — |
| Architecture | TeraScale 2 | Maxwell |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 2,154 million | 1,870 million |
| Die size | 334 mm² | 148 mm² |
Graphics Card
| Release date | Jan 14th, 2013 | — |
|---|---|---|
| Generation | Northern Islands | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 170 in our database | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 850 MHz | — |
|---|---|---|
| Memory clock | 1050 MHz 4.2 Gbps effective | 900 MHz 1800 Mbps effective |
| Base clock | — | 928 MHz |
| Boost clock | — | 1020 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 134.4 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 1600 | 640 |
|---|---|---|
| TMUs | 80 | 40 |
| ROPs | 32 | 16 |
| Compute units | 20 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SMM) |
| Cache L2 | 512 KB | 2 MB |
| SMM count | — | 5 |
Performance
| Pixel rate | 27.20 GPixel/s | 16.32 GPixel/s |
|---|---|---|
| Texture rate | 68.00 GTexel/s | 40.80 GTexel/s |
| FP32 (float) performance | 2.720 TFLOPS | 1,306 GFLOPS |
| FP64 (double) performance | 544.0 GFLOPS (1:5) | 40.80 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | Dual-slot | MXM Module |
|---|---|---|
| Length | 282 mm 11.1 inches | — |
| TDP | 175 W | 75 W |
| Suggested PSU | 450 W | — |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | No outputs |
| Power connectors | 2x 6-pin | — |
| Board number | C008, E140 | — |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 5.0 |
Other Features
Mobile graphics
| Release date | — | Oct 27th, 2015 |
|---|---|---|
| Generation | — | GeForce 900M |
| Production | — | End-of-life |
| Interface | — | MXM-B (3.0) |
| Predecessor | — | GeForce 800M |
| Successor | — | GeForce 10 Mobile |
