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My CPU... it JUST DOESN'T CARE!

post #1 of 32
Thread Starter 
About voltages it appears...

I tried all day to get my RAM to be stable at certain frequencies with certain timings.

So can someone please explain to me the logic:

CURRENT SETTINGS:

RAM: 1603MHz
TIMINGS: 7-8-7-24
QPI: 1.35
DRAM: 1.60

Okay, that's fine, right? Halfway decent timings at 4.4GHz with a 200BCLK. So can someone please explain why my computer absolutely REFUSED to boot up with the following?

RAM: 1603MHz
TIMINGS: 7-7-7-24
QPI: 1.40
DRAM: 1.656

One timing lowered and voltages were pushed to the max to support it and it didn't want to boot. It's like my CPU is completely ignoring the voltages and just doing whatever it wants.

Where's the logic?
Edited by xyeLz - 2/24/11 at 12:07am
post #2 of 32
Did you try 7-7-7-21?

Works for me..
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post #3 of 32
You could try raising your DRAM voltage. RAS to CAS Delay (the 8) is actually the most overclock resistant timing you'll find, despite the fact that CAS latency (the first number) and B2B CAS Delay (the last timing on the first set in the BIOS menu) are the most important. Don't get caught up in getting 7-7-7, 6-8-7 would benefit you far more. If you're itching for performance and find yourself with a lot of free time, try busting your way into the deeper timings. They'll devour as many hours as you can throw at them.

In any case, don't focus too much on RAS to CAS. Worry more about the other timings and you can more than make up for that 8.

Edit: Don't worry about the warning about increasing DRAM voltage over 1.65v. It refers to a critical requirement to keep your DRAM and QPI/VTT voltage within .5v of one another. i.e. if your QPI is at 1.4v, you can raise you DRAM voltage up to 1.9v without any problems (if you temps stay safe).
Edited by mymlan - 2/24/11 at 1:36am
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post #4 of 32
Thread Starter 
Somethings definitely weird here...

The RAM completely ignores the voltage.

I boosted up to 2000MHz just to see if it worked, timings as RAM specified at 9-10-9-27 and DRAM at 1.643 with QPI at 1.35.

I tried doing the timings at 9-9-9-27 at 1.656/1.40 and it didn't boot. Then, I put timings back to 9-10-9-27 and changed DRAM to 1.6/1.35. It booted up and is perfectly stable. Why does the RAM not care at all about my DRAM voltage? This is so odd.

Like how am I supposed to tighten the timings if it doesn't give one care in the world about the voltages? Am I doing something wrong? Is there a setting I need to change?
post #5 of 32
Chances are the binning on your sticks won't all the RAS to CAS delay dip any lower than 10 at 2000Mhz. My RAM won't allow me to dip under 9 regardless of frequency. If you're hellbent on getting 9-9-9 timings you might try pushing the DRAM voltage up to 1.74v and see if you can squeeze anything out of it. Just be sure your temps don't get out of hand and that the DRAM volts stay within .5v of the QPI/VTT voltage.
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post #6 of 32
Thread Starter 
Quote:
Originally Posted by mymlan View Post
Chances are the binning on your sticks won't all the RAS to CAS delay dip any lower than 10 at 2000Mhz. My RAM won't allow me to dip under 9 regardless of frequency. If you're hellbent on getting 9-9-9 timings you might try pushing the DRAM voltage up to 1.74v and see if you can squeeze anything out of it. Just be sure your temps don't get out of hand and that the DRAM volts stay within .5v of the QPI/VTT voltage.
EDIT: Just saw this, sorry! I definitely don't want to go past 1.65 just because I don't have a way to monitor my NB temps. Thanks for all of the help though mym! Wish someone else coulda chimed in to back you up!

Well I finally got it stable at 4.4GHz at 2000MHz 9-10-9-27-143 (standard specifications) against your recommendation mym (sorry, I just wanted to see if I could get there). I have no idea how I got here since it wouldn't boot last night but here are my specs:

22x200BCLK
QPI: 1.35
PLL: 1.88
DRAM: 1.60

I still don't know why my RAM chooses to ignore the voltages though. I feel like I should be able to get tighter timings by increasing the QPI and the DRAM voltages but no matter what I do the second I even try to lower one timing it won't even boot.

So lost. Now it's just a matter of whether or not I want to go down to 1600 at 7-8-7-24. Anyone have suggestions?
Edited by xyeLz - 2/24/11 at 12:24pm
post #7 of 32
I'd love to be helpful, but am I the only person here who thinks that a person with a 980x @ 4.4Ghz and GTX 580 SLi.. complaining about a single tRCD clock cycle..

Is a mockery to human kind.
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post #8 of 32
Thread Starter 
Quote:
Originally Posted by Track View Post
I'd love to be helpful, but am I the only person here who thinks that a person with a 980x @ 4.4Ghz and GTX 580 SLi.. complaining about a single tRCD clock cycle..

Is a mockery to human kind.
I don't mean to be rude, but uhm...

Do you realize you're on OCN!?!?!? Haha
post #9 of 32
Considering your cooling setup I'd suggest setting your PLL to 1.8v, chances are your chip will run more stable at a cooler temperature. PLL voltage is only for high BCLKs on air for the most part. That's some quality RAM you've got there, despite your issues with it. I'd suggest keeping the 10 and trying to push the CAS Delay down if you can. Also take a look at your B2B Delay (the last number in the first set of timings in the BIOS menu), as lowering it has proven to be critical to i7 performance. Don't be too timid to give your RAM more voltage, those are pretty nice heatsinks and I assume you designed your case to keep the interior ambient temperature.

You may also try playing with your BCLK and multiplier to see if you can come up with something a little faster or cooler. i7's have a tendency to like odd multipliers. Give 163x27 a shot. It'll leave your RAM running at 1956Mhz but that's what timings are for.
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Leviathan
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post #10 of 32
Thread Starter 
Quote:
Originally Posted by mymlan View Post
Considering your cooling setup I'd suggest setting your PLL to 1.8v, chances are your chip will run more stable at a cooler temperature. PLL voltage is only for high BCLKs on air for the most part. That's some quality RAM you've got there, despite your issues with it. I'd suggest keeping the 10 and trying to push the CAS Delay down if you can. Also take a look at your B2B Delay (the last number in the first set of timings in the BIOS menu), as lowering it has proven to be critical to i7 performance. Don't be too timid to give your RAM more voltage, those are pretty nice heatsinks and I assume you designed your case to keep the interior ambient temperature.

You may also try playing with your BCLK and multiplier to see if you can come up with something a little faster or cooler. i7's have a tendency to like odd multipliers. Give 163x27 a shot. It'll leave your RAM running at 1956Mhz but that's what timings are for.
I will give it a whirl, mym. Guess it can't hurt.

By the way, when my PLL was at 1.8, my computer was crashing. That's why I pushed it up to 1.88 and it has been fine. I might mess around with that later but for now I'll see what happens.

1.88 is safe, right?

EDIT: One thing I do definitely want to note is that I have TWELVE (12) GB of RAM on 3 STICKS. I don't have the 6GB kit which is easier to gain lower timings. However, I also don't have 6 sticks of RAM, so in theory it should be easier to achieve lower timings without super voltage.
Edited by xyeLz - 2/24/11 at 12:36pm
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