**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.89
**Blender Version**
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-01-27 04:28, hash: `rBfc669a4c3ec0`
Worked: (newest version of Blender that worked as expected)
**Short description of error**
[GPU can't be detected in Preference -> CUDA]
I've installed two versions of blender in my computer.
One is 2.91, which is installed by exe file. blender can detect my GPU.
{F9600186}
While the other, I installed by source code, why my GPU can't be detected?
{F9600188}
Ask for help, thank you !
Based on the log file Blender does not appear to find the precompiled kernels:
```lines
I0127 18:45:27.647745 16576 device_opencl.cpp:48] CLEW initialization succeeded.
I0127 18:45:27.675781 16576 device_cuda.cpp:41] CUEW initialization succeeded
信息: 用提供的模式无法找到文件。
I0127 18:45:27.739830 16576 device_cuda.cpp:51] Neither precompiled kernels nor CUDA compiler was found, unable to use CUDA
I0127 18:45:36.089162 16576 opencl_util.cpp:957] Enumerating devices for platform NVIDIA CUDA.
I0127 18:45:36.089162 16576 opencl_util.cpp:1007] Ignoring device GeForce RTX 2060 SUPER, not officially supported yet.
```