The NVIDIA GeForce GTX 645 OEM was a capable graphics card utilizing the GK106 architecture on a 28 nm process, supporting DirectX 12 at feature level 11_0. It featured 576 shading units, 48 TMUs, and 16 ROPs, delivering robust performance for its time. Paired with 1,024 MB of GDDR5 memory on a 128-bit interface, it offered a memory bandwidth of 80.00 GB/s. Operating at 824 MHz for the GPU and 1000 MHz (4 Gbps effective) for memory, it provided reliable performance without needing an additional power connector, drawing a maximum of 65 W. Outputs included DVI, HDMI, and DisplayPort, making it versatile for various display setups.
| GPU Name | GeForce GTX 645 |
|---|---|
| Architecture | Kepler |
| Foundry | TSMC |
| Process Size | 28 nm |
| Transistors | 2,540 million |
| Density | 11.5M / mm² |
| Die Size | 221 mm² |
| Chip Package | BGA-908 |
| Generation | GeForce 600 |
| Production | End-of-life |
| Bus Interface | PCIe 3.0 x16 |
| Base Clock | 824 MHz |
| Shader Clock | * |
| Memory Clock | 1000 MHz |
| Memory Size | 1024 MB |
| Memory Type | GDDR5 |
| Memory Bus | 128 bit |
| Bandwidth | 64.00 GB/s |
| Shading Units | 576 |
| TMUs | 48 |
| ROPs | 16 |
| SM Count | 3 |
| L1 Cache | 16 KB (per SMX) |
| L2 Cache | 256 KB |
| Pixel Rate | 9.888 GPixel/s |
| Texture Rate | 39.55 GTexel/s |
| FP32 (float) | 949.2 GFLOPS |
| FP64 (double) | 39.55 GFLOPS (1:24) |
| Slot Width | Single-slot |
| Length | 147 mm |
| TDP | 65 W |
| Suggested PSU | 250 W |
| Outputs | 1x DVI |
| Power Connectors | None |
| Board Number | P2010 SKU 20 |
| DirectX | 12 (11_0) |
| OpenGL | 4.6 |
| OpenCL | 3.0 |
| Vulkan | 1.2.175 |
| CUDA | 3.0 |
| Shader Model | 6.5 (5.1) |
| Condition | New |



















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