4x1gig ocuk fail but 2x1gig ok -help

juno_first · 3 Aug 2007 at 19:16

I've been running 2x1 gig DDR2 1066 OCUK RAM for a while now & its been ok.

Just got another 2x1 gig DDR2 1066 OCUK RAM (Stalker with 2gig texture pack :eek:

) & its not ok.

Running either set of 2 sticks & Prime/memtester CD is ok but with 4 sticks prime fails mem test or wont even boot vista.

all at stock
Gigabyte P35 DQ6 (tried F4 & FL5 bios)
q6600
4x 1gig OCUK DDR2 1066 (even put copper heatspreaders on the RAM + overhead fan as they run very hot)

As all the RAM is ok when run as 2 stick there must be the motherboard or perhaps they need more voltage?

Can anyone help, thanks

juno_first · 3 Aug 2007 at 21:45

Well this is really wierd... to run 4 sticks I have to lower the RAM voltage from 2.2 to 2.1 & also chipset voltages :eek:

Prime looks stable now at 1100 with 4 sticks

fine tuning voltages now for full stability

wierd how if all at stock/auto 4 sticks dont work but if you lower voltages < what they should be, its stable :rolleyes:

Cob · 4 Aug 2007 at 14:03

I'll have to bear that in mind now that it's back in stock and I can get my second pair.

I've found that going from 2.1v to 2.2v has very little effect anyway. Mine do over 1100mhz 5-5-5-15 at 2.1v and they gain maybe 30mhz with 2.2v.

juno_first · 4 Aug 2007 at 14:59

Not quite stable yet, keep getting blue screens with 4 sticks.
Its more stable at 1095mhz 2.0v than auto 1066 or any other voltage WTF.
Tried different timmings too.

Is anyone running 4 sticks of DDR2 RAM & what are your voltages/timmings?
Preferably OCUK RAM at 1066.

ta

londonbairn · 6 Aug 2007 at 12:41

I use 4x1gb PC2-8500 OCZ reaper with no problems.

I had to use 2T though not 1T. This is on a P5K Deluxe.

melbourne720 · 6 Aug 2007 at 15:01

4 x 1GB of OCZ 6400 at stock. 4-4-4-15 2T timings.

Memory overclocking seems too problematic for me!

I'd just leave the Memory at 1:1 with the FSB, is it really worth it to overclock if it's being so unstable? It's cheaper than most 6400 RAM, so you have good speed for the money.

juno_first · 7 Aug 2007 at 18:32

Looks like my RAM timmings are not right...

How can you set to 2T in the Gigabyte P35 DQ6 BIOS ?

My screenshot with BIOS at default & forcing RAM at 1066 2.2v.
At these settings memtester errors/Vista BSODs (ignore 440fsb -its really doing 266):

Cob · 7 Aug 2007 at 18:59

The P35 boards are always set to 2T.

Those settings look fine, tho 2.2v is possibly a little too high for them at 1066mhz.

juno_first · 7 Aug 2007 at 19:21

Yeah I find the RAM most stable at 2.0v

hmm so if the timmings look fine them I'm at a loss...

Cob · 7 Aug 2007 at 19:30

Have you tried changing 'High Speed DRAM DLL Settings'?

I think it's primarily a >1000mhz Micron D9 compatibility setting tho.

juno_first · 7 Aug 2007 at 19:33

Cob said:
Have you tried changing 'High Speed DRAM DLL Settings'?

I think it's primarily a >1000mhz Micron D9 compatibility setting tho.

I dont understand a word man, how do you change 'High Speed DRAM DLL Settings'? ::::::::::::: sorry yes I see it.. tried changing that on auto too

juno_first · 7 Aug 2007 at 20:41

A BSOD I managed take a picture of, if anyone knows the code:

londonbairn · 7 Aug 2007 at 20:53

did you try 2.3, thats what i set my ocz at

juno_first · 7 Aug 2007 at 21:12

rafster said:
did you try 2.3, thats what i set my ocz at

2.3 is more unstable than 2.0 & 2.4 fails post, though 2 sticks run fine at 2.2 / 2.4

juno_first · 12 Aug 2007 at 00:01

The plot thickens:

Vista64 BSOD's instantly on boot with 4 sticks, no matter what timings/voltages at 1066.

Vista32 is a winner: being Prime stable for 5 seconds

Seriously though, its deffo a hardware prob :confused: