Originally Posted by Blameless
I'd still recommend running Linpack (with AVX if you have the appropriate hardware, and you do). It can catch errors Prime misses, just as Prime can catch errors it misses.
Linpack tests, especially on older binaries are sensitive to the amount of memory you set, and using all memory usually reduces the stress on the CPU and IMC in Linpack. Yes, that's counter intuitive, but it's what I and many others have observed.
I set Prime95 blend to use 22GiB of my ram, but I normally only use 512MiB to 4GiB with LinX.
Also, not one of these tests will hit anything beyond the CPU and memory. In real use other components may be stressed, so you need to test their stability as well.
I found that when I am riding a fine line between LinX saying there is not enough memory and then it actually running, I still have to reduce the amount of memory down a little bit to get the most out of the test. I found that as I lower the amount down from this described absolute maximum, my core temps increase. However, there comes a point where the core temps stop increasing and I find yet another balance point: using more memory results in lower temperatures, and using less results in higher temperatures. Using less memory than that does not result in higher temperatures. So, I ride that balance point to get the most amount of memory used while also getting the highest temps.
It's not as complicated as I made it sound: all you have to do is tell LinX to use all of your available memory. If it fails and says there isn't enough, then manually reduce it in small increments (let's say 5 MB). When the test finally runs, watch your temps. After the first pass (if you make it), stop the test and lower the memory some more. You will get higher temperatures by a little bit. Keep doing this until your temps stop getting higher because you just found that 2nd balance point.
Although, Sandy Bridge makes this easier: just use Prime95 Custom, and use 1024 MB less
than the total amount of memory you have installed. I have 8GB, sot hat means I would use 7168MB. You can do the same thing with Prime95 to find that "2nd balance point", but it's not really worth it because this is already quite awesome for a Sandy Bridge stress test.
Originally Posted by Lime
LinX/Linpack + Prime95 is the best way to stability test something. I could get a day of LinX/Linpack on my 780i/Q9400 but it always failed Prime95 because of my awful RAM.
Yeah, but things are very
different for Sandy Bridge. With Sandy Bridge, it's now essentially a waste of time to use Linpack.Edited by TwoCables - 8/22/11 at 9:03pm