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What should my DRAM Timing settings be?

post #1 of 6
Thread Starter 
So I am trying to configure my BIOS for a 3.6GHz overclock on my i7 920. I can basically get everything going exactly as I want except for the DRAM but I will get to that in a minute. I followed a few tutorials and found the best settings for me. Here is my current BIOS settings:

Here are my BIOS settings:

Ai Overclock Tuner: Manual
CPU Ratio Setting: Auto
Intel Speedstep: Enabled
Intel Turbo Mode: Enabled
BCLK Freq: 171
PCIE Freq: 100
DRAM Freq: DDR3 - 1371MHz
UCLK Freq: 2742MHz (lowest)
QPI Link Data Rate: 6171MT/s

DRAM CAS# Latency: 8 Dram Clock
DRAM RAS# to CAS# Delay: 8 DRAM Clock
DRAM RAS# Pre Time: 8 DRAM Clock
DRAM RAS# ACT Time: 24 DRAM Clock
The rest set to Auto

CPU Voltage: 1.18125
DRAM Bus Voltage: 1.64
Load Line Calibration: Enabled
The rest set to Auto

Now my only concern is the DRAM timing settings. I had no real idea what to set them as because I have no idea where to get the right numbers from my RAM sticks. I have taken some photos of the sticks and was expecting to finds numbers for the timings like 8-9-8-24 or something but I can't find any of these readings on the card. Here it is here:

whefwy.jpg
So what should my DRAM timing settings be that are shown on this stick?

And one more concern. I have 3 sticks of 2GB 1600MHz RAM @ 1600 but with my current BIOS settings they only get to 1371 with 171x21. When I change the BCLK to 200 and multiplier to 18 I get a DRAM of 1600 but when I run Prime95 I immediately get errors and the software stops. What could be doing this?

What would be the ideal BIOS settings for my rig?

Thanks so much to those who can offer some help

Sam
post #2 of 6
Use CPU-Z and look on the SPD tab, it will show the timing settings for your RAM at different speeds.
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post #3 of 6
Looks like a 1600Mhz 9-9-9 28 2t 1.5V kit. looks like the stuff in this pic http://www.hardwareoverclock.com/NANYA_Elixir_PC3-12800_DDR-3_Tripple_Channel_Kit_6GB.htm
    
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post #4 of 6
I googled the serial in your pic, and it seems timings are 9-9-9-28 for your memory. To run it at 1600mhz, start by setting those timings, if you still get errors you may have to increase QPI/DRAM voltage a bit, assuming your CPU itself is stable at 200 BCLK. Try manually setting it at 1.25 and work up from there.
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post #5 of 6
Thread Starter 
Thanks for the replies fellas.

So here is a re-cap of what I've done. I ended up putting in the timings as suggested, 9-9-9-28, then went ahead and changed the BCLK to 200 and multiplier to 18. I also changed my QPI/DRAM Voltage to 1.26 and CPU PLL to 1.8. I booted up the OS and my temps were ~8 degrees higher on idle and as soon as i hit Prime95 I BSOD. I have come to the conclusion that I probably don't have a good enough cooling system to keep bumping up my voltage to support a 1600Mhz RAM with a 3.6GHz OC i7 so I will still with the 1371MHz for now.

Are there maybe any tips you guys could give with the best QPI/DRAM Voltage, CPU PLL, DRAM Voltage for my setup (in sig) ?

cheers
post #6 of 6
What cooler are you using, and what are your temperatures when running P95? Overheating could be an issue but these chips can take a beating, it's unlikely temperature alone causes your system to crash.
You're using a CPU multiplier of 18, right? A lot of people, myself included, have stability issues with even CPU multipliers on the 920. I'm thinking this is causing your instability right now. Try setting that to 19, you may need to bump Vcore slightly for that to work though. Start with 1.2 Vcore and work from there. Keep RAM frequency low until you're sure your CPU so that you can pinpoint any instability issues. Once your CPU is stable, bump up your memory multiplier and see how it goes.
I think when I was at 200 BCLK I only needed 1.2v DRAM/QPI, 1.24 Vcore (may have been just 1.2 as well) and 1.8 CPU PLL (a lot of people raise this but I don't need more than 1.8 even for 221 BCLK). Keep DRAM at 1.5v as that's what your RAM is rated for.
Edited by Vonnis - 6/20/12 at 11:08am
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