X99 Memory dividers

jp7152 · 28 Apr 2015 at 08:59

Hope someone can give me some advice as I know nothing about X99. I have read that to use faster speed memory you have to use a divider?

When on X79 using the 125 strap you lose down clocking at idle. I presume this is different to using a divider on X99?

So two questions I guess. What is the fastest memory speed X99 can run at without using a divider and are there any downsides to using one?

Thanks in advance!

Gripen90 · 29 Apr 2015 at 12:51

The fastest memory you can use on X99 without 125 strap and ram divider is DDR4-2666MHz AFAIK.
I'm using DDR4 2400MHz which the board itself set it to.

jp7152 · 9 May 2015 at 09:11

Thanks Gripen90

8 Pack · 9 May 2015 at 11:29

Thats incorrect.

Many memory dividers are currently working on 100blk strap. 3200mhz is fine for example no issues on RVE and Champion.

jp7152 · 9 May 2015 at 11:59

Ah interesting. Do you know about the Asus X99-S 8 Pack?

Cheers

Mick-1965 · 9 May 2015 at 12:42

With 100 BCLK, the memory dividers go all the way up to 4000 on the X99-S. From 2666 the options are 2933-3200-3467-3733-4000
Cant comment on the stability, as I'm only running 2666.

8 Pack · 10 May 2015 at 11:45

^ On launch not even 3200 working properly. Now fixed though also 3400 working now.

I only test Champion Rampage as these are my system boards and bench boards. Others should work yes but Bios support is behind compared top the enthusiast boards.