How to properly use Prime95:
1) Make sure you have the latest version, 27.9 if i remember correctly. This is important as old versions did not support the harder to run AVX FFTs.
2) Close the box that pops up when you start the program, go to Advanced, and enable both SUM(INPUTS) Error checking and Round off error checking.
3) Go to Options and select Torture Test.
4) Select Blend, but do not hit OK. Then select Custom, this will copy the blend settings over to it.
5) Set "Memory to Use" to your maximum RAM minus 1GB (7000 for 8GB, 15000 for 16GB) etc.
6) Start the Torture test and open task manager. Make sure you are not paging RAM, you want about 5% physical RAM free. If you are paging RAM, restart it with lower RAM usage. If you have more free RAM than that, raise it instead. If you set RAM usage too high, paging can slow the test down and not fully stress the CPU/RAM.
7) Run the program for at least 24 hours. This is important, even though many claim 2-3 hours is plenty, it is not. If you are not able to run the program for 24 hours you should adjust the "Time to run each FFT" length accordingly. You want to do a full FFT loop, and with the default 15 minutes it's usually around 24 hours before it starts to repeat tests. Just because it's stable for 6 hours, it can still immediately crash with some FFTs. I don't recommend adjusting the length, just do a full test to ensure full stability.
8) Do NOT
use the computer during testing. Your RAM is being pushed to the limits, opening a browser or other tasks will cause the entire computer to slow down and will affect the results.
Hopefully this helps. I wouldn't trust random Youtube videos. I've seen some people claims some pretty outrageous things, like running LinX for 20 passes on Normal settings is 100% stable.
Originally Posted by orndorf77
I watched videos on you tube and they have some videos of choosing small FFTs and some videos of choosing blend test so I am a little confused I did the blend test and on real temp 3.70 it was saying I was using 50% to 60% load so I have been choosing small FFTs test to get 100% load and my max temp is 67c I did not choose advance options and check round off though
Blend should still be using 100% if settings and program is up to date. If it still isn't, my guess would be something is limiting your processor... or for some reason Prime is not detecting the correct amount of threads. Make sure it's set to 8 for a 4770k.Edited by Murlocke - 3/20/14 at 10:16pm