Geil 2133MHz RAM problem

DavieJG

DavieJG

DavieJG

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Hey guys,

I'm having some issues with the geil ram i purchased from here.

Basically i can't get it to work properly anywhere near rated speed. I have it in an overclocked i5 setup @ 3.7GHz with 185 bclk

Hence my memory options are 1110MHz, 1480MHz or 1850MHz.

To get the correct timings i loaded the XMP and then went to manual timings and disabled the XMP so it is running at rated 9-9-9-28, every one of these timings should be within specification. I have the memory @ 1.65v also.

At 1110MHz everything is fine.

When i up it to 1480 or 1850 i get a 'cold startup bug' for lack of a better name. i.e. windows will load and then hang, generally with a blank screen. if i restart the machine, it runs fine. if the machine is restarted again it is fine, its only after it has been off for a significant period that i get this crash. After this restart ive prime blend tested for 15hrs without a hitch @ 1850.

Anyone have any ideas what would cause this startup bug? I'm leaning toward the RAM as it can be solved by lowering its speed but i understand this may not be the sole cause.

Cheers for any help you guys can provide!
 
Isn't anything higher than 1333MHz on Lynnfield chips classed as overclocking?

Maybe your chip doesn't have a strong IMC, and just isn't capable of running these DIMM's at their rated frequency?
 
i have been having all sorts of problems with my setup and seems to be memory related, randomly freezing in desktop or internet explorer, but runs fine under load in games, just very random and starting to bug me a lot, started the usuall test such as memtest and occt and stuff, memtest reports no errors , occt will pass an hour, but prime fails blend test within an hour, sometimes within a few minutes, so have tried allsorts with the settings for memory timings @1.65v as stated from ocz,

now here were i tell you ive fixed it

so ive about given up and have requested an rma with ocuk, which they have issued no problem
but im now testing at auto volts on the memory and timings of 9-9-9-28 and so far prime95 blend test is upto nearly 4 hours without a fail which is a hell of a lot more than i thought i would get

im thinking now the 1.65v was too much for them and it kinda makes sense why it was crashing and freezing when not underload but fine underload

hope this is some help to you
and fingers crossed it will make a full 24 hours of prime95 blend for me
 
you will need to put the imc volts up a lot to get it near those speeds

the geil is great memory in dual and tri channel configs

what board are you running?
 
MSI p55 Gd-65

which voltage is the IMC? dont think its listed as that in the bios.

EDIT: ah after a quick bit browsing i see it is the VTT voltage. I guess that is probably a good place to start for my troubles!
 
Last edited:
DavieJG said:
MSI p55 Gd-65

which voltage is the IMC? dont think its listed as that in the bios.

EDIT: ah after a quick bit browsing i see it is the VTT voltage. I guess that is probably a good place to start for my troubles!
Click to expand...

just be cautious as intel spec a maximum of 1.21v
 
failed. doesnt seem to be vtt that is the problem. the fact that it runs fine at 1850 @ 1.149v after a restart i guess means my voltages are fine.

what else could it be?
 
I'm not sure how the i5 works but on i7 920 you have to have the Uncore twice that of the RAM, considering stock uncore speed is about 2.66Ghz and for DDR2000 you'd need 4Ghz uncore it is asking quite a lot...
 
Just to be clear, since your memory multiplier is capped at x10, you will need to hit a 213 BClock to attain 2133 on the memory. I have not looked much but I don't think I've seen many i5 750s doing that.
 
yes i understand that. I dont want it to run at 2133MHz, i want it to run @ 1850MHz. As it is rated for 2133MHz this shouldn't be an issue and indeed it isnt, except for the first boot when the pc has been off for several hrs.

Could it be a BIOS issue?
 
well max Vtt and ram voltages cant get it stable for first boot :(

BIOS flashing scares me a little, even a small chance of bricking my board makes me nervous
 
BIOS flashing is safe if done properly.

NEVER flash from the OS. Flash in DOS or with the built in DOS based utility.

Clear your BIOS before the flash, then load setup defaults, then flash.

Don't flash during an electrical storm.
 
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