NVIDIA GeForce 830A vs NVIDIA GeForce GT 650M Mac Edition
Graphics Processor
| GPU model | GM108 | GK107 |
|---|---|---|
| Architecture | Maxwell | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | unknown | 1,270 million |
| Die size | unknown | 118 mm² |
| GPU variant | — | N13P-GT-W-A2 |
Mobile graphics
| Release date | Jul 22nd, 2014 | Jul 12th, 2012 |
|---|---|---|
| Generation | GeForce 800A | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Predecessor | GeForce 700A | GeForce 500M |
| Successor | GeForce 900A | GeForce 700M |
Clocks
| Base clock | 1082 MHz | — |
|---|---|---|
| Boost clock | 1150 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 1254 MHz 5 Gbps effective |
| GPU clock | — | 900 MHz |
Memory Configuration
| Memory size | 2 GB | 512 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 GB/s | 80.26 GB/s |
Render Configuration
| Shading units | 256 | 384 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 8 | 16 |
| SMM count | 2 | — |
| Cache L1 | 64 KB (per SMM) | 16 KB (per SMX) |
| Cache L2 | 1024 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 9.200 GPixel/s | 7.200 GPixel/s |
|---|---|---|
| Texture rate | 18.40 GTexel/s | 28.80 GTexel/s |
| FP32 (float) performance | 588.8 GFLOPS | 691.2 GFLOPS |
| FP64 (double) performance | 18.40 GFLOPS (1:32) | 28.80 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | IGP | — |
|---|---|---|
| TDP | 33 W | 45 W |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 5.0 | 3.0 |
| Shader model | 5.1 | 5.1 |
