Mobo says it supports 1866 but it fails to boot?

Techen

Techen

Techen

Soldato
Joined
5 Feb 2012
Posts
2,650
Hi guys, I have confusing problem with ram.

My motherboard is a : GA-Z68XP-UD3P

Support for DDR3 2133/1866/1600/1333/1066 MHz memory modules

Ram I have is Corsair Vengeance 1866mhz.

So everything checks out until I try and run it at 1866mhz, I get bios hangs, Fail to boots and windows being VERY unstable.

HOWEVER, I tested the slots with ram I know works and its fine, I can also use this ram at 1333mhz with no problems, Only when I set it to what its ment to be "1866Mhz" So whats the problem? Main board or ram?

I tested one of the sticks on memtest at 1866 and got this result...

20140623_143927.jpg


It makes it look like the stick is dead, HOWEVER, Run it at 1333mhz and not 1866mhz and theres no problems whatsoever. The other 3 sticks I could not test as my computer would boot, turn off and restart until it reset my clock settings.

So please guys, Help me out. I've got in touch with corsair and waiting a reply from them. Thanks.
 
Are you using the XMP default for the RAM or are you manually setting the frequency to 1866MHz?
 
Alright was just checking you were using XMP, as if you weren't it could have related to the timings or other settings not being correct. Just eliminating a possibility.
 
how much dram voltage does it set for 1866mhz?

8gb or 16gb? if 16gb might need more cpu/vtt voltage maybe 1.10v
 
wazza300 said:
how much dram voltage does it set for 1866mhz?

8gb or 16gb? if 16gb might need more cpu/vtt voltage maybe 1.10v
Click to expand...

Tried and tested, Its 16 GB, 4X4GB. I've increased its ram voltage from 1.5 to 1.6 and increased cpu/vtt to 1.10v and get the same results. No change at all.
 
I also have a normal, turbo and extreme setting for ram. Normally if I go to 1866mhz I set it to normal as any other settings makes it insanely unstable. Timing settings?
 
Techen said:
I also have a normal, turbo and extreme setting for ram. Normally if I go to 1866mhz I set it to normal as any other settings makes it insanely unstable. Timing settings?
Click to expand...

those tighten up the rams secondary timings,so normal would be best

could be bios compatibility issue with that ram idk,max safe for vtt is 1.2v so you could try 1.15v? shouldn't need 1.2v

dram voltage is important also,anywhere from 1.5v to 1.65v id test with
 
wazza300 said:
those tighten up the rams secondary timings,so normal would be best

could be bios compatibility issue with that ram idk,max safe for vtt is 1.2v so you could try 1.15v? shouldn't need 1.2v

dram voltage is important also,anywhere from 1.5v to 1.65v id test with
Click to expand...

I've tried 1.6 and I've not tried 1.15v on vtt. Are these safe settings though? I don't want to kill anything. But yea, Could lack of voltage be causing these problems anyway?
 
yeah,its safe to test with

if no joy I would return the ram and try another brand,i cant think whatelse it could be,maybe some teamgroup or Kingston

it could be just poor bios support
 
wazza300 said:
yeah,its safe to test with

if no joy I would return the ram and try another brand,i cant think whatelse it could be,maybe some teamgroup or Kingston

it could be just poor bios support
Click to expand...

Interesting to suggest bios, Am running the beta bios which was updated around two years ago now? They've stop support it and the bios was still in beta when I got it so yea. It's not the best but its the only bios they released to support UEFI bios, It could be the reason its just not great.

Anyway, I'll ramp up the voltage as high as possible and try it once more. If not I've already got in touch with corsair about my ram.

I've just heard about teamgroup, The other ram I used was made by teamgroup. Is it any good then? Better than corsair?
 
So just tried ram set to 1.65v and VTT at 1.15 and it restarted fine. Checked to see on bios and XMP had set it to 1886 and not 1866... I have no idea why but yea. But not 5 seconds later bios froze up and when I restarted the pc it just looped restarted over and over till it reset clocks again. sigh :(
 
I suppose this could be seen as progress, on the bright side. :)

Try everything the same but with the frequency set to 1866 rather than 1886. I'd be surprised if it is the issue, but not too surprised.

My 1600MHz Vengeance wouldn't even overclock to 1620MHz. :rolleyes:
 
Acme said:
I suppose this could be seen as progress, on the bright side. :)

Try everything the same but with the frequency set to 1866 rather than 1886. I'd be surprised if it is the issue, but not too surprised.

My 1600MHz Vengeance wouldn't even overclock to 1620MHz. :rolleyes:
Click to expand...

How can I change XMPs settings? I had XMP on and the mhz set to 1866 but memtest displayed it as 1886 mhz and not 1866? :S
 
On my motherboard I checked what settings the XMP chose, and cloned them all, then adjusted the frequency.

On some motherboards you can't see the detailed settings the XMP profile sets though. Unsure if you can on yours.
 
Acme said:
On my motherboard I checked what settings the XMP chose, and cloned them all, then adjusted the frequency.

On some motherboards you can't see the detailed settings the XMP profile sets though. Unsure if you can on yours.
Click to expand...

For XMP it has a profile 1, Which is set to 1866mhz but I don't understand where it's getting the 1886 mhz, Somethings overclocking it more but there's no settings on for that. Am going to take this ram up to a friend and run memtest at 1866 on his mobo to see if it errors or not. Am most likely going to pick up a teamgroup 1600mhz or 1866mhz ram. Am unsure about the 1866 cause it could be my terrible mobo...
 
you can set the ram speed manually,no xmp

look for system memory multiplier in the bios,select manual then it should give you a list of speeds to choose

1333mhz
1600mhz
1866mhz

ect
 
ahh ok I missed that

all I can think of is your bios being oldish,they wont include all the fixes and support for more memory makes/models

it should work no trouble at 1866mhz
 
Does it run okay at 1600mhz?

I'm surprised nobody has mentioned this already but the memory controllers are built into the CPU and afaik no LGA115x CPU officially supports 1866mhz memory, memory and motherboards being rated at 1866mhz is mainly marketing because the CPU support isn't there and overclocking isn't guaranteed.

At the end of the day if you get a CPU with a bad memory controller, or rather if you don't get a really good overclockable one then no amount of tweaking is likely to get it to run stable even if your motherboard/memory supports it.

edit: i5 3570K specification:
http://ark.intel.com/products/65520

Memory Types DDR3-1333/1600
Click to expand...
 
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