Solved Hi- 8 giga ram won't load windows but 6 does?

[rozroz]

Hi- searched the threads but couldn't find exact answer.
if this was discussed before please link me, thanks.

i run windows 7 ultimate x64 on a gigabyte ga-p35-ds3p MB, geforce 8600 gt.
i had 4 giga kingston 800 hrz running fine. (2x2g)
i bought another identical 2 so i'll have 8 giga, supported by the MB.
so now, when i have 3 of them inserted, windows uploads fine with 6 giga.
but somehow when i add the last 2giga stick, it has a problem with it.
(all stick are perfect, re-checked in shop).
i get start up screen with windows starting logo, and from there-
it stays like that for a minute at least, afterwards screen gets black and it cannot proceed. waited a long time.have to shut down manually.

is this bios issue? or windows 7 tweaking?

thanks in advance,

Roei

 

[DirtyElf]

how did you check the sticks in the shop? are 100% certian you dont have a bad stick of ram?

 

[rozroz]

Yup.. He checked this stick and it uploads windows just fine

 

[brady]

bad slot?

 

[Phone Man]

Could be a ram voltage issue. Try tweaking the bios and increase the ram voltage maybe 1/4 v at a time and see if it helps. I have seen some boards that the extra ram will drag down the voltage just a tad.

Jim

 

[rozroz]

is that such a rare problem? where do i tweak the voltage?

thanks

*not a bad slot. tried it already.
tried increasing ddr voltage by 0.05- no go.
all the sticks are 1.8v, so why should there be a voltage problem?

maybe something with the geforce 8600 not calibrated ?

 

[Phone Man]

is that such a rare problem? where do i tweak the voltage?

thanks

*not a bad slot. tried it already.
tried increasing ddr voltage by 0.05- no go.
all the sticks are 1.8v, so why should there be a voltage problem?

maybe something with the geforce 8600 not calibrated ?

What voltage and timing are you running? My ram also runs at 1.8v to get the best timing values. They default to 1.5v but at slower values. Try using CPU-Z and post the SPD and Memory information.
CPUID - System & hardware benchmark, monitoring, reporting

Jim

 

[rozroz]

thanks:

 

[rozroz]

so i can rule out bios update?
this board is from 2007 and never been bios updated.
but it seems like a risky business - unless there's a very safe way to do it and it MIGHT solve the ram issue..

 

[Phone Man]

On the SPD tab does all you ram match? Swap out one of the ram sticks and run CPUZ again and see if the SPD matches on all four ram sticks.

Jim

 

[rozroz]

On the SPD tab does all you ram match? Swap out one of the ram sticks and run CPUZ again and see if the SPD matches on all four ram sticks.

Jim

i checked the slots tab on the SPD- all 3 have exact match

 

[Phone Man]

Can you swap out one of them to be sure the new one you put in also matches. It probably will but just want to make sure.

Jim

 

[rozroz]

the new one is already on board
one of the working ones is out.

 

[Phone Man]

If you put all four in what does the bios post show. Does it show all the ram?

Jim

 

[rozroz]

checked it earlier- bios shows 8 giga ...

 

[Phone Man]

I would suggest you download Memtest86+ as an ISO and burn it to a bootable CD and then boot from it and run the test on all 4 sticks. If that works then its not a hardware problem.

Memtest86+ - Advanced Memory Diagnostic Tool

Jim

 

[rozroz]

ok, i'll do it.
but suppose they come out fine, and it's not a bios thing,
what do i need to tweak in windows ?

 

[Phone Man]

I'll have to call for more help. At least that will prove the ram and motherboard slots are ok.

Jim

 

[rozroz]

you mean you calling for more help on the forum?
or me calling for a tech guy?

 

[yowanvista]

Go to Msconfig and uncheck Max memory(Start>Run>msconfig>Boot>Advanced Options)

You could also post a screenshot of the memory tab in Resource Monitor