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Asus P5W DH Deluxe - New Memory Woes :(

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December 6, 2008 2:00:02 PM

I'm a bit stumped and wondered if anyone could possibly help me here.

I've just installed 2 x 2GB Crucial Ballistix DDR2 PC2-6400 memory modules in my Asus P5W DH Deluxe but can't get the 4-4-4-12 timings to work!

It's working perfectly well with Auto timings (which CPU-Z reports are 5-5-5-18-21) & DRAM Frequency set to DDR2-800. POST reports the memory correctly as PC2-6400 dual channel with these settings.

When I set the timings to 4-4-4-12 (as recommended by Crucial) the PC won't boot to Vista.

I've set the memory voltage to 2.0v (again as recommended) and have noticed that if I raise it to 2.15v it will boot to Vista but soon becomes so unstable it literally just powers off!

Anyone?
a b } Memory
a b Ĉ ASUS
December 6, 2008 2:39:51 PM

I would set the RAM voltage to 2.1v. Then increase the Northbridge voltage to 1.4-1.45v. If still no 4-4-4-12, try 5-4-4-4-10
a c 81 } Memory
a b Ĉ ASUS
December 6, 2008 2:58:02 PM

I noticed the same issue with mine. I use G.Skill memory that works fine at 1.9V and 4-4-4-15 at 400Mhz on my P5Q Deluxe, but my P5W DH Deluxe crashes. I also have a kit of OCZ Platinum that should also work at 4-4-4-15 with 1.9V, but it doesn't. It's stable at 5-5-5-15 and the performance difference isn't enough to worry about it.
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December 6, 2008 3:08:39 PM

badge said:
I would set the RAM voltage to 2.1v. Then increase the Northbridge voltage to 1.4-1.45v. If still no 4-4-4-12, try 5-4-4-4-10


As far as I can see the Northbridge voltage is already at 1.5v?
December 6, 2008 3:10:29 PM

GhislainG said:
I noticed the same issue with mine. I use G.Skill memory that works fine at 1.9V and 4-4-4-15 at 400Mhz on my P5Q Deluxe, but my P5W DH Deluxe crashes. I also have a kit of OCZ Platinum that should also work at 4-4-4-15 with 1.9V, but it doesn't. It's stable at 5-5-5-15 and the performance difference isn't enough to worry about it.


Hmm, that's interesting. So, do you think that getting it to 4-4-4-12 isn't going to improve performance that much anyway?
a c 81 } Memory
a b Ĉ ASUS
December 6, 2008 3:12:17 PM

It's your motherboard, but you should do some research about it before increasing the NB voltage as that can lead to an unstable system. I wouldn't do it on mine just to gain 1% performance at most; it just isn't worth it.
December 6, 2008 3:18:21 PM

GhislainG said:
It's your motherboard, but you should do some research about it before increasing the NB voltage as that can lead to an unstable system. I wouldn't do it on mine just to gain 1% performance at most; it just isn't worth it.


Yeah, I'm beginning to realise that the difference won't be all that much if any.

I've got a Q6600 installed at stock so might try overclocking the entire rig to see what happens!

It'll be my first time but apparently the Q6600 and Crucial RAM are very overclockable?

Thanks all.
a c 81 } Memory
a b Ĉ ASUS
December 6, 2008 3:22:00 PM

Your RAM won't overclock that much, but you can easily overclock the CPU. Again that motherboard isn't as good an overclocker as motherboards based on newer Intel chipsets like the X38, X48 or P45.
December 6, 2008 3:37:30 PM

I have been having many issues with Crucial... My set cannot get 4-4-4-12 no matter the voltage at 400mhz
a c 81 } Memory
a b Ĉ ASUS
December 6, 2008 3:53:42 PM

I have the same issues with G.Skill an OCZ modules that work perfectly in other systems. In this case, the motherboard more than the memory modules are to be blamed. The OP isn't using Crucial memory modules that require high voltages to run at 4-4-4-12. They only require 2.0V and my modules require 1.9V. Since they can easily take 2.1V, I increased the voltage to no avail. Anyhow I didn't lose sleep over not getting the last 1% performance increase, if that much.
!