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post #21 of 52
PC-16000 stands for 2000MHz if i'm not mistaken. In order to reach 2000 stable you will need to increase the RAM voltage to 1.65V and maybe loosen the timings a bit, to 9-10-9-27. QPI voltage may need a little bump also. Try it as is, and if it remains unstable try upping it a little until 1.5V max, what do you guys think? leave the rest of the settings as is, as RAM Speed shouldn't afeect them that much.
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post #22 of 52
I'm jumping in on this thread. I'm currently messing around with my 980x to see if I can squeeze a little more performance out of it. My crappy Asus mobo won't allow me to dip under 1.8 PLL although I've noticed through my own experimentation that less PLL is better. On that note, is there any reason not to pump 1.3v+ through the IOH if you have a nice WB on it? I've read it can add to stability, especially in a CF/SLI config.
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post #23 of 52
Thread Starter 
Quote:
Originally Posted by matroska View Post
PC-16000 stands for 2000MHz if i'm not mistaken. In order to reach 2000 stable you will need to increase the RAM voltage to 1.65V and maybe loosen the timings a bit, to 9-10-9-27. QPI voltage may need a little bump also. Try it as is, and if it remains unstable try upping it a little until 1.5V max, what do you guys think? leave the rest of the settings as is, as RAM Speed shouldn't afeect them that much.
Just crashed.

Here are my specs:

RAM: 2005MHz
TIMINGS: 9-10-9-27 (as stock specified)

QPI: 1.35v
DRAM: 1.656v (lowest it would go at 1.65, is this safe?)

Any idea why I'm crashing? If someone could help me by viewing my first post and just clarify which voltages affect what I would really appreciate it.
post #24 of 52
While I can't say for sure, my 980x requires 1.35v QPI just to push 3500 uncore / 1744 RAM. You may need more voltage
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post #25 of 52
Thread Starter 
Just got error code 3B on another test. I pushed the IOH to 1.25 and the test ran for a lot longer. Not sure if that's an indicator of anything. What does that error mean? Should I raise the IOH to 1.3v?

This is why I asked about the descriptions earlier since I'm not sure what each voltage effects :x

EDIT:

By the way, the first attempt on 2005MHz at 9-10-9-27 booted up perfectly. Ran fine in BurnTest and then bluescreened 3B. Second attempt when I boosted up the IOH voltage to 1.25 it ran even longer and then my computer rebooted into BIOS. Third attempt when I increased even further to 1.3 my computer froze in the middle of the test. Anyone?
Edited by xyeLz - 2/23/11 at 3:34pm
post #26 of 52
IOH controls the chipset voltage, and can help at high BCLK. Error code 3B signifies a core error and may require a bump in Vcore. How long did it take to blue screen?
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post #27 of 52
Thread Starter 
Quote:
Originally Posted by mymlan View Post
IOH controls the chipset voltage, and can help at high BCLK. Error code 3B signifies a core error and may require a bump in Vcore. How long did it take to blue screen?
I would say in all 3 of the cases, out of the ~500 seconds that the test runs for, probably at about 200-300 seconds before BSOD/reboot/crash.

Vcore is the CPU voltage, correct? Mine is currently set at 1.35v. I didn't really want to go higher than that.

Which would provide more performance?

1600MHz @ 9-9-9-24 (current)
2000MHz @ 9-10-9-27 (failed testing)
2200MHz @ 10-11-10-30 (an estimate, I have no idea the actual values)
post #28 of 52
Try this: CPU voltage: 1.35v, QPI voltage: 1.35v, CPU PLL: 1.8v, IOH: 1.2v, LLC on

CPU 168x25, RAM: 1680Mhz 8-8-8, QPI: 6048Mhz
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post #29 of 52
Thread Starter 
Quote:
Originally Posted by mymlan View Post
Try this: CPU voltage: 1.35v, QPI voltage: 1.35v, CPU PLL: 1.8v, IOH: 1.2v, LLC on

CPU 168x25, RAM: 1680Mhz 8-8-8, QPI: 6048Mhz
That is perfectly stable. Thanks mym. Could be because it's at 4.2GHz though. And the 1680MHz on the RAM with those timings is fine too.

=/

Gah I just want my RAM at 2000MHz! :/

Anyone know which of the RAM specs I listed above will give me more performance? I may not even want to go to 2000/2200 if the 1600 gives more performance, although I don't see why it will?
post #30 of 52
The beauty of RAM is the interchangability between frequency and timings. Now that you're stable, try bumping your BCLK 1-2mhz at a time. You may also experiment pushing your timings down to 7. I'm glad to hear it's stable. Understand that RAM at 1600 cl7 is faster than 2000 cl9.

Edit: Be assured that you do not waste your money running your RAM at 1600Mhz. The high binning of your sticks will allow for far lower timings than cheaper RAM.
Edited by mymlan - 2/23/11 at 4:41pm
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