AMD Radeon R9 M385X vs NVIDIA GeForce GT 645 OEM
Graphics Processor
| GPU model | Strato | GF114 |
|---|---|---|
| GPU variant | Strato XT | — |
| Architecture | GCN 2.0 | Fermi 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 2,080 million | 1,950 million |
| Die size | 160 mm² | 332 mm² |
Mobile graphics
| Release date | May 5th, 2015 | — |
|---|---|---|
| Generation | Crystal System (R9 M300) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Solar System | — |
| Successor | Mobility Radeon | — |
Clocks
| Base clock | 1000 MHz | — |
|---|---|---|
| Boost clock | 1100 MHz | — |
| Memory clock | 1200 MHz 4.8 Gbps effective | 957 MHz 3.8 Gbps effective |
| GPU clock | — | 776 MHz |
| Shader clock | — | 1552 MHz |
Memory Configuration
| Memory size | 4 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 192 bit |
| Bandwidth | 76.80 GB/s | 91.87 GB/s |
Render Configuration
| Shading units | 896 | 288 |
|---|---|---|
| TMUs | 56 | 48 |
| ROPs | 16 | 24 |
| Compute units | 14 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 256 KB | 384 KB |
| SM count | — | 6 |
Performance
| Pixel rate | 17.60 GPixel/s | 9.312 GPixel/s |
|---|---|---|
| Texture rate | 61.60 GTexel/s | 37.25 GTexel/s |
| FP32 (float) performance | 1.971 TFLOPS | 894.0 GFLOPS |
| FP64 (double) performance | 123.2 GFLOPS (1:16) | 74.50 GFLOPS (1:12) |
Dimensions & Outputs
| TDP | unknown | 102 W |
|---|---|---|
| Outputs | No outputs | 2x DVI1x mini-HDMI |
| Slot width | — | Dual-slot |
| Length | — | 210 mm 8.3 inches |
| Suggested PSU | — | 300 W |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 6.3 | 5.1 |
| CUDA | — | 2.1 |
Other Features
Graphics Card
| Release date | — | Apr 24th, 2012 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
