Going from 2Gb to 4Gb

sepulchre · 9 Jan 2008 at 17:13

I've just ordered up another 2Gb of OCZ PC6400 Platinum memory for my PC, will I need to do anything in Bios/XP/Vista to get it to recognise it or is it a case of plugging it in and going?

Rig -

Q6600
P5K-e Wifi

Cheers

jak731 · 9 Jan 2008 at 17:14

you may need to increase the ram voltage to about 2.1V

steve258 · 9 Jan 2008 at 17:25

With most mobos you won't have to do anything it will pick up all 4Gb, but look for the memory remap option in the bios and enable it if it's not detecting 4gb correctly.

sepulchre · 9 Jan 2008 at 17:48

OK cheers fellas

Aod · 9 Jan 2008 at 18:16

you might also need to raise the Northbridge voltage.

AndyOcUK · 12 Jan 2008 at 16:21

You might also want to make sure you have a 64 bit OS as 32 bit OS won't do more than 3.25Gb

sepulchre · 12 Jan 2008 at 17:19

All sorted cheers fellas, had an initial problem with one stick not wanting to play, loaded defaults into the bios and it booted, now have it booting with my OC profile in and its stunning, vista 64 flies along with 4Gb

sepulchre · 15 Jan 2008 at 11:25

Could do with a little advice guys, I was playing with overclocking my rig last night and after editing the bios the PC refused to boot again, removing this 1 stick of Ram I mentioned previously allowed it to boot, changing this stick for another again stopped it booting so I'm starting to think I may have a bad stick here, what do you think?

shauncr91 · 15 Jan 2008 at 11:28

sepulchre said:
Could do with a little advice guys, I was playing with overclocking my rig last night and after editing the bios the PC refused to boot again, removing this 1 stick of Ram I mentioned previously allowed it to boot, changing this stick for another again stopped it booting so I'm starting to think I may have a bad stick here, what do you think?

Try resetting CMOS and then applying the settings it originally worked with. You might have to boot into BIOS with just 1 stick of RAM if you cant boot after resetting CMOS.

ssmacc · 15 Jan 2008 at 12:06

Have you got the latest BIOS? I found 4GB to be a right pain at first...i also found i can't Overclock as well with 4GB so you might have to settle for slightly less spead (although the 2GB gain is worth a minor speed decrease)

sepulchre · 15 Jan 2008 at 12:24

I'm on Bios 0602 which was recommended by Pneumonic as later bios's have dreadful vdroop. I have it running now at the same OC as when running 2Gb - 3.5Ghz on a Q6600 with the memory running at 390Mhz 5-5-5-15 @ 2v, its just odd that it wont boot with this one particular stick if I try to do anything to the bios, i.e 1Mhz +/- on the FSB. I'll do a full reset of the CMOS rather than loading defaults and see how that goes.

Balb0wa · 16 Jan 2008 at 10:23

i tried adding another two sticks of ocz pc6400 in my p5k to get 4gb.

They just wouldnt work, tried upping the voltage etc, they were even dodgy on there own, thing is they work fine in a different pc downstairs.

Pneumonic · 16 Jan 2008 at 10:34

set NB volts to 1.45v

Slow the DRAM Command Rate to 2T

sepulchre · 16 Jan 2008 at 14:28

Advice from OCUK was to use 2.1V, which is a little different from the spec on their web site of "1.9-2.0 Volts" although I suspect the site is wrong. OCZ went further and suggested 2.1V and 1.5v through the NB. I've gone to 2.1V but was already running the NB at 1.55v (I think not in front of the PC at the mo) Ram was already at 2T, so basically the only change I've made is to go to 2.1V, I've yet to try changing my overclock as tbh I'm getting reluctant to fiddle to much in case it doesn't start up again.

Still seems very odd that this one stick wouldn't play the game even when it was on its own until I loaded in default settings, yet the other 3 sticks were all fine?