can I mix and match?

Amleto · 1 May 2011 at 14:20

I have these: http://www.overclockers.co.uk/showproduct.php?prodid=MY-288-CS&groupid=701&catid=8&subcat=1517

but they only fit at the two last memory slots as they are too tall to fit under the heat sink. Can I add these
http://www.overclockers.co.uk/showproduct.php?prodid=MY-203-CS&groupid=701&catid=8&subcat=1517
or
http://www.overclockers.co.uk/showproduct.php?prodid=MY-222-OC&groupid=701&catid=8&subcat=1517

to my motherboard (ma790xt-udp4)?

Why are the dominators so expensive in comparison?

Plec · 1 May 2011 at 14:25

Amleto said:
I have these:

>snip <

Can I add these
to my motherboard (ma790xt-udp4)?

Yep, I would personally go for the XMS3 as it's pretty slutty - plus it's default timings (XMP) are exactly the same as your present memory.

Amleto · 1 May 2011 at 14:55

ok, cheers

although looking at the xms3 again, it looks like the heat spreader is slightly higher than the pcb.

Plec · 1 May 2011 at 15:04

Np.

I've just double checked your MB spec - what voltage is your present memory set at?

The reason i ask is that your MB spec lists DIMM socket for 1.5V which is fine for 2 sticks but may not be enough when all DIMM slots are in use. What's your maximum voltage available in the BIOS - as you may need the full 1.65V to run 4 sticks.

Amleto · 1 May 2011 at 15:50

let me see...

Amleto · 1 May 2011 at 15:59

Currently (hrr hrr), it's set to +0.150V = 1.750V

Plec · 1 May 2011 at 17:43

Great - looks like you have voltage settings to spare.

It may be worth checking if you can get your present set stable at 1.65V (it's default voltage) or lower. If you can then hopefully all 4 strips will run at 1.65V or below.

I'm running XMS3 and it's happilly ticking over at 1.5V - it maybe the Corsair Dominator will run just as low?

Plec · 1 May 2011 at 17:50

EDIT: Sorry just noticed this.

Amleto said:
although looking at the xms3 again, it looks like the heat spreader is slightly higher than the pcb.

It is but by a very small amount - is your space that limited?

What cooler have you got - it may be that i or someone else has fitted/using the same cooler with similar low profile memory?

Amleto · 1 May 2011 at 18:01

just knocked it down 0.1V. Know of a decent free memory torture test? Nothing obvious was thrown up from google.

e:
as for the cooler, I think its an arctic cooling one. can't recall the exact model :-/

this one I think:

http://www.overclockers.co.uk/showproduct.php?prodid=HS-035-AR&groupid=701&catid=57&subcat=1395
it's the outer circular ring that is right over one of the slots

Plec · 1 May 2011 at 18:18

The Arctic Cooling Freezer 7 Pro Rev 2 should be fine with the XMS3.

Memtest is the best torture test - run from a bootable ISO. I'll find the link...

Here you go link. Scroll down to Memtest86+ V4.20 (25/01/2011) and the Pre-compiled Bootable ISO zip.

Amleto · 1 May 2011 at 18:57

thought memtest was just an integrity checker?

Plec · 1 May 2011 at 19:26

It is but the process involves stress testing the memory - so it's both.

If your memory cannot operate at the lower voltage settings memtest should identify this fairly quickly. Your memory may well be able to operate below 1.6V - some people are running dominators at 1.5V like my XMS3.

I would also prime95 for a few hrs too.

I only suggest the lower voltages because if you can get your dominators to run at >1.6V you'll have more voltage options if you run into problems running 4 sticks. (Plus their max tested voltage is 1.65V)

Plec · 1 May 2011 at 19:59

Below is an image of the Arctic Cooling Freezer 7 Pro Rev 2 using XMS3:

Amleto · 2 May 2011 at 15:12

awesome, nice one

Amleto · 2 May 2011 at 18:56

now I've just gotta hope I can fit them without taking the hsf off first

Plec · 2 May 2011 at 20:57

You should be able to unclip the fan from the HS - that hopefully will give you enough space.

jonny512379 · 4 May 2011 at 00:47

i have the same ram and cooler (different motherboard though).
It is a tight fit (if i had have known how tight i would have put them in before the cooler)
However the plastic fan surround was all that got in my way and luckily it was easy to bend this surround slightly (be careful !!) to allow squeezing the ram in to slot 1 or 2. so basically i am saying they do fit, but only just.