F3-1600C10D-16GAO and Asus Rampage IV Extreme

[mephistopheles]

My pc configuration is below
Mainboard: Asus Rampage IV Extreme
Ram: F3-1600C10D-16GAO
VGA: GTX 570 (no sli)
PSU: 730 watt Aerocool
I can?t install 4 x 8 ram, CPU-Z shows 32 gb ram but Windows shows 24 gb only
All my hardware brand new, checked all ram and ram slots individually, updated bios, enabled XPM but nothing
are they incompatible with x79 chipset and/or Asus Rampage IV Extreme?

[Tradesman]

Should be fine, what CPU are you using? Ensure each stick is firmly seated i.e. press in hard enough for the clips to lock by them selves

[mephistopheles]

Should be fine, what CPU are you using? Ensure each stick is firmly seated i.e. press in hard enough for the clips to lock by them selves

i7 3820
each stick correctly seated and cpu-z can read them
but bios and os says 24 gb instead 32

[Tradesman]

Might try raising DRAM voltage + 0.05 and QPI/VTT the same

[mephistopheles]

Might try raising DRAM voltage + 0.05 and QPI/VTT the same

Tried dram voltage but same
What should vttddrr voltage value?
It's auto and options are min: 0.6250v max: 1.1000v standart: 0.750v increment: 0.00625v
Also couldn't find qpi in bios options

[Tradesman]

QPI/VTT is the VTTDDR try 1.100 or take it up slowly an increment at a time

[mephistopheles]

Tried slowly increase to 1.1 but still no luck :/

[Tradesman]

Take a little higher, up through 1.2, and DRAM + another 0.05

[mephistopheles]

can't unfortunatelly
VTTDDR cap is 1.1v max
and tried Dram slowly increased to 1.65v
still same

[mephistopheles]

eurotech said try these values
a. DRAM Frequency = 1600Mhz
b. DRAM Voltage = 1.65V
c. VTTDDR Voltage (CHA, CHB, CHC, CHD) = 1.15V
d. CL Timing = 10-10-10 (tCL-tRCD-tRP) (All other timing settings on Auto)
e. Command Rate = 2
and still same

[mephistopheles]

also they adviced me to try 32gb (4x8) kit instead of my 2 16 (2x8) kit for any compatibility issue
i'll try that if my vendor accept test before swap rams
but i wonder if i want upgrade to 64 gb, 2 of 32 gb kit will give me same problem

[Tradesman]

Would want a single 64 GB set, mixing sets, even to get to 16GB or 32GB is very problematic, going to 64 is even worse

[mephistopheles]

there is no 64 gb kit in my country (Turkey) and have to mix anyway.
i'll take my chance with 2 x 32 gb
we'll see if i'm lucky
thanks for your help

[Tradesman]

Keep us updated on how things go