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CPU-Z showed a different RAM frequency before my RAM upgrade. Need to OC, Details inside.

Okay guys, so a while ago I made a thread here about upgrading my RAM. I posted a screenshot from CPU-Z, to make sure I get right the CL and everything. This was the screenshot:

As you can see, it shows a 1600MHz DDR3. (I had 2x4GB Kingstons).
So I went and bought 2x4GB extra (along with a new CPU and SSD), and while not the same model (Kingston HyperX, but they look different), I made sure the new 2x4GB will also be a 1600/cl9/128000 kit.

Moving forward a ~month, I had some problems with my new CPU (that came along with the DDR3) and I solved it but updating the BIOS (you can read here)
I checked my DDR3 frequency, and even though it says 16GB and games don't crash etc, it shows my mhz as 1333 instead of 1600. I understood that in order to make it 1600 I needed to enable XMP, but I checked the BIO and the XMP was greyed out on 'Disabled' (without being able to toggle and change to profile1).

I then took screenshots from CPU-Z, and noticed something was off, and this is probably why I could not toggle XMP.
My #1+#3 slots are with the newer kit, and they both look like this:

#2+#4 are the older kit, and they both look like this:


So basically, as you can see, CPU-Z now shows different frequency for the older kit. I don't think it made sense, as you can see above - prior to the format and BIOS update it was showing the kit to be 1600, but I made sure in the BIOS and it seems to be the true frequency of the kit... This kinda screwed me, because I was basing my upgrade on the fact these were 1600Mhz. The moderator of this sub (Tradesman1) also mentioned that the serial number of this kit is 1333.

Anyways, moving on - I want to try and OC the older kit to make it play along as 1600 with the older kit, but how do I do that, exactly?
Should I now take it out the older kit (and only have the newer kit in), then go to BIOS and come here:

write down all frequencies (you can scroll down and there are actually many more parameters), and then remove the kit and insert the older kit, then change all of the frequencies to the identical ones of the newer one and also increase voltage by 0.06 (according to the mod) here:

and only then insert the newer kit and test to make sure they play along nice @ 1600?

I'd just like an explanation how to make sure I change it properly, and if I should indeed touch all parameters from the screen shown, or just a few.

Thanks guys.
(MoBo is GA-Z87-HD3)
8 answers Last reply Best Answer
More about cpu showed ram frequency ram upgrade details inside
  1. Only a 16gb tested kit would be guaranteed to work. Adding more ram frequently fails to work at all. You're lucky it even works.

    if you added the exact same make and part number you might have a chance that it at least works. Maybe even properly.

    Different makes or part numbers nearly always just plain won't work.
  2. i7Baby said:
    Only a 16gb tested kit would be guaranteed to work. Adding more ram frequently fails to work at all. You're lucky it even works.

    if you added the exact same make and part number you might have a chance that it at least works. Maybe even properly.

    Different makes or part numbers nearly always just plain won't work.


    Yeah I get that, but what's done is done, and yes - these kits play along together, but at 1333.
    Do you think that it doesn't perform as well because they are different? Or as long as the kits play along then the performance is just fine (even if at 1333)

    Besides that, will OC'ing it not help? the mod also suggested I should try that D:
  3. Try setting manually to 1600 to 9-9-9-27 and raise DRAM voltage to 1.57 also look for CPUVTT or DDRVTT and up it to about 1.10
  4. Tradesman1 said:
    Try setting manually to 1600 to 9-9-9-27 and raise DRAM voltage to 1.57 also look for CPUVTT or DDRVTT and up it to about 1.10


    Thanks!
    I couldn't find CPUVTT or DDRVTT, under which category will I find it?
    I did the rest, and this is the current position i'm at:

    how do I proceed?
    Thanks again!
  5. Best answer
    Looks like you got it, run for awhile and see if any problems (BSODs, etc), if so I'll dig up the BIOS and find the MC (memory controller) voltage, or what they are calling it and we can raise it if needed ;)
  6. Tradesman1 said:
    Looks like you got it, run for awhile and see if any problems (BSODs, etc), if so I'll dig up the BIOS and find the MC (memory controller) voltage, or what they are calling it and we can raise it if needed ;)


    Thank you!!

    I just added the newer kit. Does it look okay? (208 clocks, is it normal? I have no clue, seeing how it says 128 when dealing with a single kit)
    If yes -
    by having a 4x4GB 1600 with one kit (2x4GB) being OC'd, am I basically getting worse performance than a legit 4x4GB 1600 kit? Assuming I will have no BSoD or any other error; will they function the same, or is it still less better? I realize it will consume a bit extra voltage, but this is negligible.
  7. Looks fine! Different sets will vary and tRFC is fine also.
  8. Tradesman1 said:
    Looks fine! Different sets will vary and tRFC is fine also.


    Sweet! Thanks a lot again for all of your help ^_^
    I won't stress the memory (using prime95 or any other similar software), I'll just let it run, play and use the PC as usual and see if anything pops up. I don't wanna speak too soon, but I've already played a few games with it and it looks smooth so far.

    Thanks again
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