F2-6400CL4-2GBBHK with ASUS P5Q SE PLUS

[moose]

Hi there!

I am having problems with this setup.

In single channel, it'll work flawlessly, very stable system.

But as soon as I try to kick into dual channel: FAIL.

I get BSODs, apps crashes, memtest86 errors after a few minutes of testing.

In single channel, I let the BIOS decide the SPD settings and it works great. When trying to do the same thing in dual channel, not so great. I've tried banks 1 and 3, and 2 and 4 for dual channel, same problem.

Here is my set up:



Tell me if you need more information.

Thanks.

[Dumaine]

did you try to set all the timings and voltages manually?

[moose]

did you try to set all the timings and voltages manually?

Nope, as I was waiting for the optimal settings for my set up to be posted here

You know, I've been out of the the market for over 6 years regarding PC hardware, so I am a bit lost. I remember slapping 2X512MB of CL3 Corsair onto an ASUS A7N8X motheboard and the BIOS did all the dual channel configuring by itself. So I tought by 2010 that my P5Q mobo would do it too. :P

[Dumaine]

well first start by going into the BIOS and manually setting the memory timings to 4-4-4-12 2T and boot and see what happens. I think the voltage on those sticks are 1.8. Use banks 1 and 3 first

[Tradesman]

Might need to raise the tRFC to 64 or so also, you're showing 52

[moose]

Results:

At 4-4-4-12, 65 tRFC (No 64 avail. in my Ai Tweaker menu) and voltage set to 1.8V manually, sticks in slots 1 &3, but could not confirm "2T" as I didn't find any options that looked like this:

Fail. Many memtest86 3.3 errors after 3 mins of testing. Would not try to boot Windows 7 and screw up my installation with those errors.

Thanks.

[Tradesman]

Looked your sticks up and these call for 4-4-3-5 timings, voltage at 2.1, command rate 2T

[Dumaine]

this is interesting....I found them on gskill web page f2-6400cl4d-4gbhk 2x2, yet the number he refers to comes up to the 2x1 and the 4-4-3-5 2.0-2.1v. Yet the gskill page has the 2x2 @ 4-4-4-12. I also see that on My cpu-z shows me with f2-6400-cl5d-2gbpq and I got f2-6400-cl5d-4gbpq. Could he have purchased the 4bghk and cpuz just breaks them down to 2gbhk per slot installed?? if so would that not lead back to gskills page and the 4-4-4-12 @ 1.8??

[moose]

Sticker on the box says:

F2-6400CL4D-4GBHK

CL4-4-4-12 1.8-1.9V

I tried that already before coming in here, but did not touch the voltage yet though.

So the box says 6400CL4D (for dual channel I guess) but NOT CPU-Z :?

[Tradesman]

I was looking at your original post where you showed it as F2-6400CL4-2GBBHK (extra 'B', I deducted)

[moose]

Soo, I memtest86'ed both sticks individually for 30mins + (one of the sticks went trough the whole 1hr15 mins test) and both came out OK, no errors.

Tested at 4-4-4-12 tRFC 65 and voltage at 1.9

I have latest BIOS which is 2204.

[moose]

Woo! Back online in dual channel baby!

Settings: 4-4-4-12, 2T, 65 tRFC, 1.9V

Just had to disable Mem OC Charger and set Clock Twister to "Lighter"

Thanks to all for the help!

[Dumaine]

congrats, I figured you would get it after playing around in there lol I just wish I could have seen your eyes when it posted and went on into Windows lol

[moose]

congrats, I figured you would get it after playing around in there lol I just wish I could have seen your eyes when it posted and went on into Windows lol

Actually, I don't boot Windows before memtest86 shows solid results (don't want to screw up my Windows install).

But it was total pot shot though, I don't even know what are these settings for... I just know that "Lighter" probably means more for stability than performances.

[Tradesman]

The clock twister sort of makes minute adjustment to to your timings, if your running CL5, then higher or tighter might be having your CL at 4.8/5.1 as opposed to just plain 5 , where lighter might be more like 5.5/5.6.....way more than I want to play with, if your runing 5-5-5-15 as an example, you won't see any difference in that from say a 5-6-6-17......so who wants to get into, what may be tenths.........