NVIDIA GeForce 845M vs NVIDIA GeForce GTX 285 Mac Edition
Graphics Processor
| GPU model | GM107 | GT200B |
|---|---|---|
| GPU variant | N15S-GT1R | G200-350-B3 |
| Architecture | Maxwell | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 55 nm |
| Number of transistors | 1,870 million | 1,400 million |
| Die size | 148 mm² | 470 mm² |
Mobile graphics
| Release date | Feb 7th, 2015 | — |
|---|---|---|
| Generation | GeForce 800M | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | GeForce 700M | — |
| Successor | GeForce 900M | — |
Clocks
| GPU clock | 863 MHz | 648 MHz |
|---|---|---|
| Memory clock | 1001 MHz 2 Gbps effective | 1242 MHz 2.5 Gbps effective |
| Shader clock | — | 1476 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 64 bit | 512 bit |
| Bandwidth | 16.02 GB/s | 159.0 GB/s |
Render Configuration
| Shading units | 512 | 240 |
|---|---|---|
| TMUs | 32 | 80 |
| ROPs | 16 | 32 |
| SMM count | 4 | — |
| Cache L1 | 64 KB (per SMM) | — |
| Cache L2 | 1024 KB | 256 KB |
| SM count | — | 30 |
Performance
| Pixel rate | 13.81 GPixel/s | 20.74 GPixel/s |
|---|---|---|
| Texture rate | 27.62 GTexel/s | 51.84 GTexel/s |
| FP32 (float) performance | 883.7 GFLOPS | 708.5 GFLOPS |
| FP64 (double) performance | 27.62 GFLOPS (1:32) | 88.56 GFLOPS (1:8) |
Dimensions & Outputs
| Slot width | IGP | Dual-slot |
|---|---|---|
| TDP | 45 W | 204 W |
| Outputs | No outputs | 2x DVI1x S-Video |
| Length | — | 267 mm 10.5 inches |
| Suggested PSU | — | 550 W |
| Power connectors | — | 2x 6-pin |
API Support & Features
| DirectX | 12 (11_0) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 3.0 | 1.1 |
| Vulkan | 1.1 | — |
| CUDA | 5.0 | 1.3 |
| Shader model | 5.1 | 4.0 |
Other Features
Graphics Card
| Release date | — | Jan 15th, 2009 |
|---|---|---|
| Generation | — | GeForce 200 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 88 in our database |
| Predecessor | — | GeForce 9 |
| Successor | — | GeForce 400 |
