Hi, I was running Prime 95 on a 2600K and was getting FATAL ERROR: Rounding was 0.5, expected less than 0.4 Hardware failure detected. One of the workers stopped and in core temp the load reduced to 50% on one of the cores (normally 2 or 4 from what I recall). This was at stock speed of 3.4GHz with normal RAM timings. I read elsewhere that someone who had the above error more often than not discovered the memory was at fault so I ran Memtest86+ 4.20 on the memory and got an error on Test 2. I removed one of the modules and got no errors, switched out the other module and got the Test 2 error, tried in a different slot same Test 2 error. I then switched the module to a different PC running 1156 and an i3 540 and got the Test 2 error. I switched it back to my PC, loaded the Failsafe options in BIOS, saved, rebooted and run the test again getting the error again. Would this indicate that the memory module is faulty and needs to be returned for a replacement.