z170 Extreme 7+ and Trident z 3200 o/c

If you check the Memory Support List for our board (you know I have one too, right?), you can find at the top of that page this note:

Note3: For 2pcs (DS), please use A1 and B1 slot.

Your G.SKILL F4-3200C16D-16GTZ TridentZ memory is a Double Sided (DS) type of DIMM, so you should try the A1 and B1 slots. I don't have any DS memory, so I've never tried this. I'd like to know how it works for you.

I was ready to say, clear the UEFI/BIOS after moving the memory to the A1 and B2 slots, but then I remembered you use two 950 Pros in RAID 0, and we both know what happens if you do that. Safe to try it without clearing the UEFI, but you might be stuck doing that.

I am using G.SKILL F4-3200C16-8GTZB TridentZ memory, which is 2 x 4GB DIMMs, Single Sided (SS.) HWiNFO64 shows a temperature reading for this memory. Nice warm day today, the memory is reading at 88° F. I wonder what yours is?

I've noticed a difference between the DRAM Voltage setting value, and the apparent actual value, as shown in the UEFI H/W Monitor screen, and in a monitoring program like HWiNFO64. I also get a reading of 1.367V for a setting of 1.350V. Running at 3200, I can set the DRAM Voltage to 1.330V, resulting at a reading of 1.352V. I've used this memory at 3200 below 1.350V, a setting of 1.320V shows as 1.344V.

Your DS memory many need more voltage than mine, so don't think you can reduce it and get the same results as I do.

Don't forget the basic reality known as the "silicon lottery", the differences in CPUs depending upon where they were cut from the large production processor die. Your CPU's memory controller may be better or worse than mine.

What are the values for VCCIO and VCCSA voltages you have now? The XMP profile, or Auto settings in the UEFI resulted in some (seemingly) high values for these voltages. VCCIO of 1.150V (reading of 1.176V), and VCCSA of 1.250V (reading of 1.280V), is what I get. These values may be needed to allow the memory to work with boards and processors of different quality. The concept (reality) of the silicon lottery really needs to be understood better by PC builders

I am able to reduce both of these voltages with the memory at 3200. VCCSA is set to 1.140V (reading of 1.168V), VCCIO is set to 1.100V (reading of 1.128V.) Again, you may or may not be able to use these voltages with your DS memory.

I've had my memory at 3600, DRAM Voltage set to 1.350V, with VCCSA and VCCIO set to 1.250V and 1.150V, respectively.

My other settings for 3600 are all timings on Auto, and MRC Fast Boot set to Disabled, to allow memory training to occur during POST. If you have the Fast Boot option set to anything besides Disabled, set it to Disabled to insure memory training occurs. I think I could not set MRC Fast Boot back to Enabled at 3600, after several POSTs. I can set MRC Fast Boot to Enabled, and Fast Boot to Ultra Fast, at 3200.

I was reading a thread recently about extreme over clocking of DDR4 memory. Those guys don't blink at using 1.5V, which is the Intel absolute maximum. Some of them go beyond that voltage, but we are talking ~4000 on Skylake and ~3200+ on X99 boards. So ~1.4V is not crazy, but the VCCSA and VCCIO voltages are almost as important as the DRAM Voltage.

I'm not a memory OC expert at all, this is the basic stuff, tweaking your timings comes later.

Moved the DIMMs to A1 and B1 and turned off MRC,...no issues on XMP 3200.

Edited by clubfoot - 23 May 2016 at 11:10pm

I'm using UEFI version 3.00.

Really for no other reason than I feel I should try each UEFI version for the ASRock boards I have to see how they are, functionally. Nothing wrong with 2.60 except... well, as its description states...

Well, 3466 was easy enough, right? Some speeds like 3466, I believe, are more difficult to use. I bet you can get 3600 working as I did.

Your VCCSA and VCCIO voltages are almost identical to mine. You could try reducing them which might reduce the CPU temps a bit. I wonder if that would affect the DRAM temps?

Are those the DRAM temperatures during Prime95? Interesting they are that high, not that I really know better.

Now you've got me wanting 3600 again, gotta try that, I'll be back...

parsec wrote: I'm using UEFI version 3.00. Really for no other reason than I feel I should try each UEFI version for the ASRock boards I have to see how they are, functionally. Nothing wrong with 2.60 except... well, as its description states... > Long story: I have an issue with the A BIOS chip that the B chip does not have with installing windows 10 rst driver and restoring an image. I'm not sure if it's the mb switch or the A chip itself but I've requested a replacement. Our boards are very finicky, cold shutdown, taking out video cards (xFire), having both windows install and driver usb drives connected,...You touched on it in another post where you were helping another user with APCI I believe not being initialized at least once. Well, 3466 was easy enough, right? Some speeds like 3466, I believe, are more difficult to use. I bet you can get 3600 working as I did. Your VCCSA and VCCIO voltages are almost identical to mine. You could try reducing them which might reduce the CPU temps a bit. I wonder if that would affect the DRAM temps? > I'll give this a shot next. Are those the DRAM temperatures during Prime95? Interesting they are that high, not that I really know better. >Yes,...during P Blend. Now you've got me wanting 3600 again, gotta try that, I'll be back...

No luck,...will not post successfully,...at least at auto volts. I have MCR off and even moved to BIOS 3.00. This config is very stable at 4.6 cpu and 3466 ram,...very happy and the board feels good and solid.