Quote from: zendorous on August 09, 2011, 03:00:34 AM

Hello friends, I am New to Bitcoin and I am facing serious problems. I installed the guiminer software and later when I opened I got A warning message saying the OPen CL is not installed. I ignored it and when I clicked start mining an error message showed at the bottom of the guiminer saying that the dll file could not load.
I have 4GB RAM 512 MB graphics card NVIDIA and the OS is Windows XP

the recent NVIDIA geForce drivers have OpenCL 1.0, the latest GeForce 280.xx Driver have OpenCL 1.1 which should be more compatible. it's a recent addition to the beta drivers, so it should be in the WHQL's

1. uninstall the current nvidia driver,
2. download and install the newer 280.xx WHQL version and
3. reboot,
4. see if GUIMiner starts up by reading the logs. if it does work, you should notice the GPU fan starting to get louder.

mostly i expect you won't get very far, as GUIminer isn't built for NVIDIA's OpenCL and it will be far below 100Mhash/s, perhaps 30-50MHash.

Have you considered buying a new video card or are just testing the waters ?

i tried GUIminer with NVIDIA previous to changing my video card, i was running 275.33 and ATI AMD SDK 2.4 (due to not running beyond 30MH/s) and found that i had stability issues with OpenGL applications that i needed to use, as well as PhysX and other applications. there may be better options for Nvidia mining, but i'd recommend not using the AMD SDK if you're going to use a GeForce GTX card, you only end up getting 30-50Mhash/s, and an unstable gaming system