Kingston HyperX 1600 Memory Size Incompatibility

So, I have a Kingston HyperX 1600 Blu 8gb kit (2x4gb) and a Hyperx Red 1600 8gb (1x8gb) kit. Both kits work great independently, but trying to get these two kits to work together has been a major pain in the behind. I was always taught that if as long as memory was the same freq., it didn't matter what brand or size you stuck in your dimm slots, as long as you put kit pairs in both the odd or even slots (i.e. 1,3 / 2,4).

At first these would refuse to work together. I tried a number of different combination, manual speed and auto speed, changing the voltage, etc. It would either not post or hang on the bios page of the startup sequence. I finally got them to work, with the red in dimm1 and the blu in dimm 2,4. I had to manually enter the trfc settings for the dimm slot pairs to get it to work (although now it's working just fine with auto, magically, god knows why).

The only problem though is that Windows will only read it as 14gb of ram (12gb usable). Yes I've done the msconfig boot memory fix (unchecked), no I don't have an x32 or windows 7 home premium (I have windows 8 x64 pro). And I did a full memtest and got no errors.

3 answers Last reply Best Answer
More about kingston hyperx 1600 memory size incompatibility
  1. Best answer
    Can you tell us what model nr. of the memory's?
    Sure, it's never an easy task put put different memory's together and just looking for the same freq.
    It's also a matter of timings and voltage and if these mismatch=problem.

    Preferably memory's should always come from the same manufacturer and same model nr. and from one memory kit.
    Now, even if not so, it's very important that the memory first of all uses the voltage that the CPU and the memory controller is best suited for i.e 1,5V, 1,65V and so on. If not, this will stress the memory controller and shorten the life span of the CPU.
    For ex. all Intel's Core i3, i5, i7 of the second and third generation (Sandy bridge and Ivy Bridge) should use 1.5V memory.

    Then it is another important thing; will the motherboard support these memory's or if these are in the neighbourhood (sort of speaking), perhapas a BIOS upgrade will do the trick, since sometimes new BIOS ver. also support more memory types and resolve this type of problems.

    So, my first question; what motherboard do you have, manufacturer and model?
    BIOS ver.?

    Best Regards, from Sweden
  2. Flyfisherman said:
    Can you tell us what model nr. of the memory's?
    BIOS ver.?

    Knew I was forgetting something. Below are my system specs and model #s:
    Gigabyte 990X-UD3
    AMD Fx-6300 (OCed, problem persists without OC)
    MSI Nvidia 650TI
    Seagate 1tb Enterprise Drive
    CM 800W PSU

    Memory Models:
    Kingston HyperX 1600 Blu Red 8gb (KHX16C10B1R/8)
    Kingston HyperX 1600 Blu 2x4gb (KHX1600C9D3K2/8GX)

    To answer the question about the bios version it's f14b. The only thing that changed after updating bios was that it went from saying 12gb to 14gb (12gb avialable) in windows. In the bios it shows 1238mb. Since they're both the same brand of memory, I figured it wouldn't matter that they were different subbrands since they're the same speed and really the only thing that's different is the color of the heatspreader. The only reason I bought the 8gb stick rather than another 2x4gb was because it was cheaper when I upgraded later, and figured I could get another 8gb stick and go all the way to 24gb.

    Thanks flyfisherman.
  3. Never a good idea to mix DRAM, even of the same exact model, let alone different models, different timings, etc, I'd try with the 4 GB sticks in slots 1-2 the 8 GB in 3, freq to 1600, timings 10-10-10-30, 2T, DRAM voltage 1.65 initially and CPU/NB voltage 1.25
Ask a new question

Read More

Kingston Memory