what is the maximum ddr4 frequency supported for i7 5960x and asus rampage extreme mobo?

Tradesman1

Legenda in Aeternum
What set of memory are you looking at, and you are looking at a single set correct. In the TriZ's they have a 2x4GB and a 2x8GB...Both would be a bit of a waste on the X99 mobo as it supports quad channel, about the fastest available in the TriZs are the 4x8GB 3600/17 or the 4x4GB 3866/18. When you get into the upper data rate sets 4 stick sets tend to need a higher CL, also keep in ming that you will need a decent CPU OC to run the higher data rates.

Also contrary to the above post, realistically you'd prob be best with a 4x set of 3200 at most, the mobo 'officially' supports up to 3300 (can run faster, if you know what you are doing)
 
I might have explained myself the wrong way, but what you said does not contradict anything of what I said. The mobo+cpu will support any sticks, as I said, although not natively, you will have to overclock.
And you also suggested a lower freq set of ram, the same thing I did.
I did not check that the z4000 only came in sets of 2 and no quad channel, that was an important oversight from me.
We are both of the same opinion, there was no contradiction :)

Also, I believe that application is really important, some uses are more sensitive to memory speed than others. For gaming, I think a 4000 set is unnecessary.
 

Tradesman1

Legenda in Aeternum
When they indicate say 3300 as the top it supports, it should be what they have programmed for in the BIOS as far as XMP goes, so 4000 is out of the range, also while 64 and 128GB sets of say 4000 aren't available it's extremely doubtful one would be able to run that much regardless. The higher end DRAM basically 3400 and up is aimed at the Z170 rigs. It can actually get rather confusing, think the highest X99 mobo I've seen rated DRAM wise is 3400, on of the things they don't mention is whether you can run the mobos Max amount of DRAM at that, and basically on no mobo do they ever mention what CPU they test with (which is normally the highest end K model, nor do they mention what OC they had to have on the CPU to run the higher data rates. There's a lot of things that play in that don't get mentioned ;)