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i3820 DX79SR Kingston RAM speeds

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jhine5588

Registered
Joined
Aug 19, 2020
Hello,

Second post, first about this system-

DX79SR
i3820
Kingston 9905403-826.A00LF

I have successfully been able to bring the CPU clock up to 4.63ghz (128.61x36) and it runs pretty solid.

No matter what RAM speed or timings I try I can not get my setup to boot much past 4.7ghz.

I have loosened timing, raised voltages, tightened timings, slowed the RAM down, sped the RAM up, let the mobo sort everything automatically, removed all but one stick of RAM... Nothing seems to work.

If I have the bus speed much past 130 it throws a 4F fault and won't even post.

I'm believing this value RAM just does not like to run much faster than that, no matter how far I turn it down. Currently at 4.63ghz the RAM is running at 1372mhz with 12-12-12-31 timing. Default settings are 11-11-11-28.

Does anyone have a few settings I can try?

Thanks



Jeremy
 

Mr.Scott

Beamed Me Up!
Joined
Jun 9, 2013
You're limited out.

1) Sandy Bridge don't BCLK worth a damn.
2) no mention of cooling, temps, or voltage.
3) Not much point in overclocking ram. There is almost no real world benefit
 
OP
J

jhine5588

Registered
Joined
Aug 19, 2020
Cooling- Cooler Master MasterLiquid AIO
Temps- staying below 65c while running at 4.63
Voltages-
VCore 1.4
VRam 1.53
I bumped nearly all other voltage settings up a step or two just to be safe, bumped the System whatever voltage that was recommended for RAM to 1.6 iirc still with no post.

I'm used to the old Core Intel's, I don't remember what all of the voltage settings are for this "newer" stuff.

I can get specifics if necessary though.

As for the RAM, I won't bother overclocking it once I get it to post at a higher clock speed. It will probably end up around 1500 I'd guess if I can get the CPU around 5ghz, which is my goal.

Thanks



Jeremy
 
OP
J

jhine5588

Registered
Joined
Aug 19, 2020
I looked at it last night but I forget why I didn't try it... I think because I didn't try turning down the multiplier or I couldn't turn it down far enough to be at a "safe" speed on the RAM.

I'll look at that again now.

Thanks



Jeremy
Post magically merged:

Bumped it to 1.67 (on my mobo) with a 30 multiplier (I think, forgot to double check) and went through almost every BCLK to keep RAM speed under 1600 (all the way to 4.93ghz) and it would not post. All with only one stick of RAM in as well.

Currently back down to 4.5ghz (125X36) and RAM is running at 1666 11-11-11-28.

I have the cooling to bring this chip much further...



Jeremy
 

MaddMutt

Member
Joined
Jan 12, 2015
If you are wanting to push that CPU + MB here is a link to HWBot's i7-3820 submissions :cool: https://hwbot.org/hardware/processor/core_i7_3820/
As I said : You are already at the MAX the OCers have gotten to on AIR/Water. I would now reference the Link I gave to our Womack's Memory testing on Sandy & Ive Bridge CPU IMC's. His testing to good for all i7-3xxx & 4xxx Series CPU's. -- https://www.overclockers.com/memory-overclocking-guide-ivy-bridge/

You can setup an account at HWBot.org and submit you scores/join our benching team :)
Here is also a link to find out what your memory's IC's are : http://ramlist.i4memory.com/ddr3/
**AND** Here is a link to help overclock different IC's : http://www.xtremesystems.org/forums/showthread.php?285767-DDR3-IC-thread