Corsair memory

[Retired]

I noticed that corsair isnt listed in the QVL list for this Mobo... unfortunatley i noticed too late. I have 8 GB (2 x CORSAIR DOMINATOR GT 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 2133 CMT4GX3M2B2133C9 ) and try as i might i can not get this stuff to run at its normal speeds. I set it to XMP and i even up the voltage to 1.65 from 1.5 and its still not stable. Any ideas or should i order new mem sticks?

Some more info
Maximus IV B3
Bios 1409
Vertex 3 SSD
2x gtx580 sli
i7 2600k @ 4.5gh
corsair h70 cooler

[Raja]

No problem, am glad to help. You will be able to dial in those voltages when you are a bit more comfortable with the board and BIOS. One thing to bear in mind is that the higher you clock the CPU, the less chance there is that you can disable PLL OV, and if that happens you won't have any S3 resume (only matter if you use sleep mode on your PC).

-Raja

[Retired]

Raja@ASUS wrote:
No problem, am glad to help. You will be able to dial in those voltages when you are a bit more comfortable with the board and BIOS. One thing to bear in mind is that the higher you clock the CPU, the less chance there is that you can disable PLL OV, and if that happens you won't have any S3 resume (only matter if you use sleep mode on your PC).

-Raja

Raja,

I have a strange issue. Pc runs fine all day but when I went to restart it after a few hours it just hangs at the window boot screen (four color flag) and won't boot. Only way to get it to boot is to reset the mobo. Any ideas?

John

[Raja]

Hmm, that is odd. Does it do this regardless of how far you overclock the CPU?? If it is overclock related, you may need to change some of the over-current settings in BIOS.

-Raja

[Retired]

Raja@ASUS wrote:
Hmm, that is odd. Does it do this regardless of how far you overclock the CPU?? If it is overclock related, you may need to change some of the over-current settings in BIOS.

-Raja

Yea i am in the office today so i will have to play tonight when i get home tonight. I am going to start by setting the PLL OV to Auto and work my way back from there. Its a real shame because yesterday after i had it tweaked was the best it has run since i built it 4 weeks ago.

Question :
when PLL OV is enabled you lose your s3 resume or visa versa?
what voltage should i try to narrow first (VCCIO or Vcore)?
I noticed that the Vcore voltage under load (and idle) moved up and down quite a bit any way to prevent this other then taking off Auto and putting a voltage value in the bios?

[Raja]

Hi,

Don't set PLL OV to AUTO, as it will enable I think over a certain CPU multiplier ratio/frequency, so either enable or diable according to the needs of your CPU/system.

First thing you need to do is down clock the CPU and see if the system still hangs at times on the Windows screen If it does not, then you know it's OC related and likely to do with Vcore or VCCIO.

As for the Vcore moving around, that happens on AUTO with Offset Mode as you get to retain EIST and C-State power gating. The processor requests voltage from the buck controller, it's not an issue at all and actually helps you to keep a cooler quieter system. You can read about overclocking with Offset Mode in the sticky thread in this forum.

-Raja

jdpg2 wrote:
Yea i am in the office today so i will have to play tonight when i get home tonight. I am going to start by setting the PLL OV to Auto and work my way back from there. Its a real shame because yesterday after i had it tweaked was the best it has run since i built it 4 weeks ago.

Question :
when PLL OV is enabled you lose your s3 resume or visa versa?
what voltage should i try to narrow first (VCCIO or Vcore)?
I noticed that the Vcore voltage under load (and idle) moved up and down quite a bit any way to prevent this other then taking off Auto and putting a voltage value in the bios?

[Retired]

Raja,

ok an update, I reset my bios and cleared the cmos and it booted with out issue. I then re oc'ed it to 4.6 with the basics and ram at 2133. i am thinking i must have changed a bio setting by accident.

Ok so what do you think would be the best 8gb(2x4gb) ram that will run at 2133 that i can buy and will work with this Mobo. I am ready to give up on messing with my current sticks.

John

[Raja]

Hi,

If the Corsair kit in 8GB configuration is stable I would not bother spending any more of your money on another kit - whatever you get you may have to spend some time tuning the system for stability. I generally stick with Corsair, Gskill, Crucial, Patriot and Kingston myself, as they are accessible if an end-user needs support or an RMA at any time (always look for a vendor that has a good support structure in your region).

-Raja

jdpg2 wrote:
Raja,

ok an update, I reset my bios and cleared the cmos and it booted with out issue. I then re oc'ed it to 4.6 with the basics and ram at 2133. i am thinking i must have changed a bio setting by accident.

Ok so what do you think would be the best 8gb(2x4gb) ram that will run at 2133 that i can buy and will work with this Mobo. I am ready to give up on messing with my current sticks.

John

[Retired]

Raja,


You are an early bird, thanks for the quick responses. As far as what i have today i cant get my box stable above 4.4ghz with all 4 (2gb a piece) dims in place.

With only 2 (2x2gb) i can get it to boot and run at 5.0Ghz with the mem at its rated 2133 speed without issue.

So i guess i will stick with only 4 gb and see if it has any negative effect. I do alot of video work/encoding etc so the extra memory was of bennefit.

John

[Raja]

Ahh I see John. Can you tell me what timings the board sets on AUTO for the memory please?? I need to see the whole DRAM timing screens - including the "Third Timings" section. In your screenshots on the first page that section is not shown (unless I missed it).



-Raja

[Retired]

will do as soon as i get home this evening...