" This is an extremely stressful program that will
put even the most powerful X86/X64 CPU in the world at its knees. Load temp under Linpack will be up to 22*C higher than the competing software Prime95."
Is your CPU overclocked? Even on stock volts you might be getting higher temps than you think. Judging from the description of this thing it's pretty intensive on the CPU, so if there is anything wrong with your hardware, I'd start there, have you run any other programs, such as Prime 95? or Orthos?
edit. Just read it also tests your RAM, so CPU or RAM is faulty, if it's not just you've got an unstable overclock