AMD Radeon HD 7670A vs NVIDIA GeForce 840M
Graphics Processor
| GPU model | Turks | GM108 |
|---|---|---|
| GPU variant | Turks XT (215-0803000) | N15S-GT |
| Architecture | TeraScale 2 | Maxwell |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 716 million | unknown |
| Die size | 118 mm² | unknown |
Mobile graphics
| Release date | Jan 5th, 2012 | Mar 12th, 2014 |
|---|---|---|
| Generation | All-In-One (HD 7000) | GeForce 800M |
| Production | End-of-life | End-of-life |
| Interface | MXM-A (3.0) | PCIe 3.0 x8 |
| Predecessor | — | GeForce 700M |
| Successor | — | GeForce 900M |
Clocks
| GPU clock | 600 MHz | — |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | 1001 MHz 2 Gbps effective |
| Base clock | — | 1029 MHz |
| Boost clock | — | 1124 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 64.00 GB/s | 16.02 GB/s |
Render Configuration
| Shading units | 480 | 384 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 8 | 8 |
| Compute units | 6 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SMM) |
| Cache L2 | 256 KB | 1024 KB |
| SMM count | — | 3 |
Performance
| Pixel rate | 4.800 GPixel/s | 8.992 GPixel/s |
|---|---|---|
| Texture rate | 14.40 GTexel/s | 17.98 GTexel/s |
| FP32 (float) performance | 576.0 GFLOPS | 863.2 GFLOPS |
| FP64 (double) performance | — | 26.98 GFLOPS (1:32) |
Dimensions & Outputs
| Slot width | MXM Module | IGP |
|---|---|---|
| TDP | 45 W | 33 W |
| Outputs | No outputs | No outputs |
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 |
