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Memory Timing question

post #1 of 13
Thread Starter 
I will first start off by saying that today has been my first ever official test with touching memory timings and speeds.

Alright so my setup is:

GA-890GPA-UDH3
AMD Phenom II x4 955BE
8Gb's of G.Skill Ripsaw

Overclock settings:

3.8Ghz Cpu
1.45v Cpu
2800Mhz Northbridge
1.4v CPU/NB
55-57c At full load for both CPU and NB

So right now my memory timings are 7-7-7-24-1t I believe. With a frequency of 1333Mhz.

I read a few threads and the sticky up top about good timings and if I try to do anything, my computer won't boot up at all. For example I've seen that 7-7-7-24 with 1600 is better than the same timings at 1333 but whenever I set it to 1600 it won't boot. Ive also tried lowering the timings to 6-6-6-24 but once again no boot.

I am so new to memory timings and speeds that I am not sure if this is normal or maybe if there is something I am missing.

Thanks in advance if I don't respond quickly!
post #2 of 13
Thread Starter 
Oh sorry my memory voltage is at 1.5v stock
post #3 of 13
So I take it you HAVE 1600 sticks? What timings are written on them 7-7-7-24?
First off, AMD doesn't play well with 4 sticks when OCing. So keep that in mind.
What I had to do was use only 2X2GB when OCing my 965 BE and using the XMP profile (EPP in my case, same thing) in BIOS gave me the factory OC settings. As the XMP will raise all voltages needed for the OC, not just the memory voltage. I think your sticks have XMP too but only with 2 sticks in dual channel. Will not work with 4 sticks. And I could NEVER get all 4 sticks above 1066 without using ridiculously high timings. So I went with the 2 sticks and XMP OC settings.
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Smoken Hot OCer
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post #4 of 13
lower timing on ram like 6-6-6-24 from 7-7-7-24 is overclocking them. You want to raise the memory timings to like 10-10-10-30 t2, I doubt you can get is with 1333 mhz ram. I would just lower timings . Like cas is most important thats the 1st # try 6-7-7-24 t2 or try t1.
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post #5 of 13
Thread Starter 
@letsgetiton The stock timings are 9-9-9-24-2t, but thank you for the info with OCing 8Gbs I had no idea it was an issue.

@GfhTattoo - Thank you, I will def try turning the cas down 1 notch instead of all 3, I am so new to this I wasn't even sure if I should have done that
post #6 of 13
Thread Starter 
Ya I tried just lowering the cas to 6 and still wouldn't boot. Well I guess its not so bad being at 7-7-7 because for some reason on auto it was set to 11-11-11. But it says the stock is 9-9-9, I dunno weird I suppose.
post #7 of 13
1600 CL9 may very slightly outperform CL7 but in no way would it be noticeable or worth it; they're about equal. It works at your current settings.... I would leave it at that unless you really itch to modify it. To get 9-9-9 timings at 1600Mhz, set the timings manually.
post #8 of 13
Thread Starter 
So just to come back to this thread. Right now my RAM timings are 7-7-7-24-33-1T at 1333Mhz. Stock voltage. Anyone have any suggestions I could try to maybe make my timings a bit better or any tips at all? I'm only asking because this is something I only recently starting playing with. I also tried lowering my timings to 6-6-6-24-33-1T and my computer wouldn't post. I even tried just lowering the first number to 6 and same deal.
post #9 of 13
Quote:
Originally Posted by xd_1771 View Post
1600 CL9 may very slightly outperform CL7 but in no way would it be noticeable or worth it; they're about equal. It works at your current settings.... I would leave it at that unless you really itch to modify it. To get 9-9-9 timings at 1600Mhz, set the timings manually.
I have same sticks and 1333 with lower timings outperforms 1600 stock timings i have mine running at 1487 7-8-7-24-33-1t atm all 8 gigs also. I haven't tried to go lower yet,Just for s and giggles just tried to lower them more, no go even with voltage bump.
Edited by solar0987 - 3/20/11 at 5:59pm
post #10 of 13
sorry for the misleadingness, I meant 1600 cl9 > 1333 cl7. btw your kit is probably low binned and will never reach 1600 777.
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