Max Voltage

blinghound · 2 Dec 2010 at 19:22

Hey all,
I've got some Kingston HyperX 4GB (2x2GB) DDR2 PC2-8500C5 1066MHz Dual Channel installed in my rig (in sig) and I was wondering, what is the safest max voltage I can use for overclocking this RAM? I have a Corsair dual channel airflow cooler installed over them.

Thanks for any advice

w3bbo · 2 Dec 2010 at 22:05

2.1v iirc. Anything above this and you risk killing the memory. Obviously people do go higher and encounter no problems, take your chances and all that

.

setter · 2 Dec 2010 at 22:09

The kingston hyperx 8500 are rated up to 2.2v, as above though, some people will go higher to eek out that little bit more.

Big.Wayne · 2 Dec 2010 at 22:34

I got two sets of Kingston HyperX 4GB (2x2GB) DDR2 PC2-8500C5 1066MHz that run default speeds using 1.8vDimm . . . I'm not sure if you will need a ton of extra voltage to clock them but as you have active cooling then as the others have said 2.1v-2.2vDimm should be no probs . . .

Personally I'd use the minimum amount of vDimm possible to get the clocks you require . . . what DDR2 speed are you chasing anyway?

[edit]

angela · 2 Dec 2010 at 22:41

^^ As above, depends on Part Number: Mine can go up to 2.3v

blinghound · 2 Dec 2010 at 23:25

OK.. On the box I got them in, and on the side of the sticks, it states that I have the KHX8500D2K2/4G set, which is 1066mhz, but I just checked on CPUZ, and it states that I have the 6400 set :\, is this just a software bug? (picture below)

(its the same for both sticks)

@Big.Wayne
I'm trying for anywhere between 1180-1200, I could get my 800mhz rated crucial ballistix up to 1200 on 2.0v

angela · 2 Dec 2010 at 23:32

^^ I got same Ram, max is 2.3V ! as to bug: install previous version of CPU-Z, maybe your Motherboard supports only up to 800mhz?

blinghound · 2 Dec 2010 at 23:38

I tried 4 or 5 old versions, and they all say the same

, could it be they put the wrong RAM in?

The manual for my asus P5Q-pro board says that the max is 1200mhz

blinghound · 3 Dec 2010 at 17:30

Another thing I did notice is that when I reset my BIOS to the default settings, should the RAM automatically run at the rated spec? because although mine is rated at 1066, it defaults to 800mhz :s

Blue160 · 5 Dec 2010 at 11:21

I have the same RAM. had exactly the same issue with mine trying to run at the wrong speed. SPD still reports the wrong values. I had to set it all manually in BIOS. I also found that I got crashes to desktop in all games with anything less than 2.2v. With this set it now works fine, although it has limited my overclock as my crappy motherboard doesn't like the extra voltage.