Memory Compatibility Question

Alright, so, a few days ago I bought some Crucial 2 GB sticks and I ended up returning them due to overall incompatibility (even though Crucial "guaranteed" they were), and now I'm getting some Corsairs.
The current memory I have is 2x1 GB. The exact RAM can be found here:
The current RAM I'm looking at getting is this:
The reason I'm thinking of those is because its on my mobo's QVL; which can be found here:
Would the two different speeds be an issue?
Could I happily mix my current 2 gigs and the Dominator's 4, and everything will be fine and dandy?
If not; what other option on that QVL can I pick that will have the same results as the XMS+Dominator? (6 GB total, and preferably Corsair)
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More about memory compatibility question
  1. Hmm...your MOBO & current RAM info would help the Physic Hotline. :)

    What EXACT RAM do you have now; I prefer a link e.g. ->

    If you MIX-MATCH any RAM you're asking for it, and I would strongly recommend matching the EXACT RAM you have now or start from scratch.
  2. I did list my exact RAM and mobo...
    The first link I put is the exact RAM I have now.
    The QVL link is for the exact mobo I have right now...

    So are you saying I can't use my current Corsair RAM with the Cosair Dominator RAM I'm looking to get?
    (The second link I posted is the Dominator RAM I'm looking at)
  3. The QVL is a dead link - try it in another browser; remember when you needed to enter the code to D/L {e.g. G7DR9}. Next I read 'current' stated twice.

    So I guess it's still tooo much trouble to list the MOBO.

    Current RAM:
    TWIN2X2048-6400C4 - DDR2
    1GB 800 4-4-4-12 @ 2.1v

    Proposed RAM:
    TWIN2X4096-8500C5D - DDR2
    2GB 1066 5-5-5-15-2T @ 2.1v

    Don't mix Dominator with XMS: Different ICs, Speeds, Timings, etc.
  4. Oh they're going through site maintenance again...
    I did say in the last thread it was an Asus P5Q vanilla.
    They don't sell them anymore, I believe, that's why its not listed on their site.

    How about a 2 GB XMS?
    Like this one:
    EDIT: How bout this?
  5. Ended up getting these:

    They work perfectly, so it looks like I answered my own question.

    This has been solved.
  6. Work off this list of compatible RAM -> The CAS 4 probably never was the correct RAM for your ASUS P5Q.

    1GB 800 4-4-4-12 @ 2.1v
    2GB 800 5-5-5-18 @ 1.8v
    XGB 800 5-5-5-18 @ 2.0v <= You have 3 bad things: CAS Timings, Voltage and Size differences which do NOT work well together. Therefore, you're NOT Solved - you're instead 'creating' a Problem.
  7. I'm looking at the status for all four slots right now, and they all show to have the same memory type DDR2 (PC2-6400), speed (400 mhz DDR2 800), supported frequencies (270.3 mhz, 400 mhz) and the same timings (5-5-5-18-22 at 400 mhz, at 1.8 volts).
    So what's the problem? All the difference is the 1 GB vs 2 GB. How's that a problem?
    My mobo says I can mix sizes no problem.

    I'm not even using the 2 1 GB's right now as my OS is 32 bit. That's only temporary though, as I still have to buy Windows 7 64 bit.
  8. Best answer
    DDR = Double Data Rate; JEDEC = 400 MHz X 2 = 800 MHz or the rated Speed.

    So I assume everything is working perfectly then, good!
  9. Gah, I keep getting emails about this, and I solved it myself... eenie meenie miney moe...
  10. Best answer selected by Tezzick.
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