Originally Posted by brttclne22
Did you figure anything out about this yet? I'm having the same exact problem with an eerily similiar setup. Would love to get some feedback from someone who has been through this before I start tinkering with too much.
CPU – i7 6700k
RAM – GSKILL Trident Z 3200 x 32GB (4-3200C16D-32GVKA) 2x16 instead of 4x8
MB – Gigabyte Z170X Gaming 7
Video – EVGA GTX 1080 FTW
PSU – Corsair AX860i
Originally Posted by yomato26
Hey mate, nah i haven't had the chance to tinker with it have been away and put it out of my mind. Im pretty new to ocing in general so im worried about messing with the voltages and such too much just for a slight performance gain.
Right. This is the issue with XMP: it's not meant to be used in a fully stock system, as XMP by definition is overclocked memory.
They should really put that on the packaging or explain it. I don't think many people realize, stock DDR4 is 2133MHz on Skylake. That is the only frequency that is guaranteed to work.
XMP, now this is insane, is sold as overclocked memory, but it's actually not
guaranteed to run at that speed unless, #1 it's on your motherboard's QVL list (with the requisite BIOS update, if you need it) and #2 your CPU is at stock frequency.
I have no idea why this isn't more clear, but it's how we end up with situations like you mates are having.
I imagine they write this on some fine print somewhere, haha.
So, brttclne22, you are quite close. The 16GB kit of your RAM is on the QVL list
for the Gaming 7, but not the 32GB. If you call up Gigabyte, they will first say that it's not on the QVL list, then they'll say, it is double-sided instead of single-sided, which puts a higher strain on the CPU, and finally (depending if you get a "cool" rep or not), they'll say that they don't warranty overvolting or overclocking, however your sticks will likely run if you increase your System Agent voltage slightly (assuming your CPU is at stock like you wrote).
@yomato26: I understand. If you want to make sure your sticks aren't defective, you can reset your CPU to stock and see if the XMP profile works then. But, an overclocked CPU & overclocked RAM are hard to do with stock voltages.
The whole reason they only verify some sticks at certain capacities: partially, they don't have enough time to test every kit. But, in general, 4 sticks often require more voltage than 2 sticks and doubly-so if you're trying to overclock the 4 sticks. Just one of the sticks could be slightly weaker and it alone needs a voltage bump, but the whole system won't boot if it even has just one bad (i.e., voltage starved) stick.Edited by ikjadoon - 7/22/16 at 2:34pm