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One OC test to rule them all!

post #1 of 3
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So, in my quest for stability of my brand new i7-2600k at 4.7 GHz, I started with OCCT large set. I got it stable (via finding the right CPU voltage). Then I moved to Prime95 and found that in blend it blue screened a few times relatively early (i.e., first half hour). Then I got it stable at the 12 hour mark. I then ran OCCT small set, and it found errors relatively early on. Finally, I got it stable at the 10 hour mark. At this point, I thought I was good to go and I care very much about stability.

Then, I discovered the tabs on the left of OCCT and decided, "Hey, let's try some of the other tests." This is when I discovered the OCCT implementation of Linpack. Wow! I set the RAM to 14,300 MB (I have a 16 GB build) and gave it a go. I thought what the heck, I've already passed small data sets and large data sets with flying colors, nothing can break this build. Well, not only did I see temps that were some 4 to 5 C higher than ever, but within some three minutes, I was bluescreened. I had to raise the voltage a whole three (0.005 V) increments to get it OCCT Linpack stable and this was after I thought I had a perfectly stable setup. This test is just awesomeness:
  • It tests CPU with much higher temps than OCCT small data set or Prime95 small sets
  • It tests all of my memory
  • It does this all in one test
  • It fails much much earlier if there is instability than any of the other tests
  • Why use anything else for CPU testing?

From now on, OCCT with its Linkpack test and memory custom configured to leave some 100-200 MB remaining will be my go to test for checking the entire CPU / memory chain when I overclock. Of course, you should always test with multiple tests if you truely value stability, but this test, so far for me, is the fastest failure indicator. When you're trying to configure a stable setup and are tuning voltages and other settings, reducing time to stability is what it's all about.

And, OCCT has a great GPU test and a power supply test, as well!

Talk about a one stop shop for all things OC...
Edited by mgoldshteyn - 7/17/11 at 6:22am
post #2 of 3
LinX and Prime95 Blend is all i use and then OCCT GPU test.
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Lounge Gaming
(13 items)
 
NAS
(14 items)
 
Beast
(17 items)
 
CPUMotherboardGraphicsRAM
i7 7700k 4.9Ghz 1.312v Asus Z170i Pro Gaming MSI GAMING GTX 970 1545/3900Mhz 1.23v G.Skill Trident Z 2x8GB 3000Mhz 14-14-32 1.35v 
Hard DriveHard DriveCoolingOS
Toshiba DT01ACA300 Intel X25-M 160GB RAID0 Noctua NH-U14S Windows 10 Pro x64 
MonitorPowerCaseAudio
Pioneer PDP4280XD Corsair RM650x Fractal Node 304 B&W 602S2's, B&W M1 Surround, Arendal Sub1 
Audio
Yamaha RX-A1010 
CPUMotherboardRAMHard Drive
i7 3770 4.38Ghz 1.12v Asus P8Z77-I DELUXE Kingston HyperX FURY Series 16GB (2x 8GB) 2200M... Crucial M4 128GB 
Hard DriveHard DriveHard DriveCooling
Western Digial 3TB ACA Seagate Enterprise 2TB Western Digital Black 2TB Coolermaster Hyper 212 Evo 
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Windows 10 Pro BenQ 24" Monitor Seasonic M12II 620W Fractal Design Node 304 
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post #3 of 3
It's called AVX instructions.
It's been out there and everyone is using it even before you knew...
IBT w/AVX, LinX w/AVX, and the OCCT. All very similar and been around for a couple of months now. (Win7 64 SP1 Required!)
In this overclock.net, there is a whole thread about people running this tests.. I guess you missed it...
http://www.overclock.net/intel-cpus/...-2-prizes.html

Also this is NOT the one and all testing app like you think.
Yes it gives you more heat than Prime95 but Prime95 is still the ONE to know your CPU stability.
I can pass (6600MB) LinX 20 runs w/o error, but I get BSOD on Prime 10hours into it.
And it isn't just me, many people are experiencing the same result.

What's good about the AVX instruction based stress test is that it gives you so much heat so quickly so it helps you to see if your setting gives you BSOD or not in very short time.
But the true stress tests to see if your system is stable is to use Prime95 and run it 10+ hours. (usually 12-24 hours) There is no other way.
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