Any point upgrading 2666Mhz DDR4 on X99?

Disco_P

Disco_P

Disco_P

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I have 4x4 sticks of Kingston 2666Mhz C15 DDR4 in my Asus X99 Pro mobo with a 4.3Ghz overclock. I use a GTX 1080 for playing on a 1440p 100Hz monitor.

Is there any point getting faster ram?

Big problem with my current set is that every time I boot my PC, it starts up tries to post, restarts and then posts successfully. I used some Corsair RAM from a friend and had no issues. Is this a compatibility problem or a slightly faulty sticks problem?
 
Another no, so it should be clear by now. ;) You'll have to run something like Memtest86+, HCI Memetest etc to test your RAM. You could be running your RAM out of spec. Did you load the XMP profile in the bios?
 
MartinPrince said:
Another no, so it should be clear by now. ;) You'll have to run something like Memtest86+, HCI Memetest etc to test your RAM. You could be running your RAM out of spec. Did you load the XMP profile in the bios?
Click to expand...
RAM is running XMP, double boot happens no matter what settings I use. It is perfectly stable in windows stress tests and Memtest86+ just double boots every time. Problem is that I cannot remember whether it double booted on the previous motherboard I had (X99 Krait)
 
Disco_P said:
RAM is running XMP, double boot happens no matter what settings I use. It is perfectly stable in windows stress tests and Memtest86+ just double boots every time. Problem is that I cannot remember whether it double booted on the previous motherboard I had (X99 Krait)
Click to expand...
What speed and timings was your mates Corsair?
 
MaXxBoulton said:
How did you try. I would say 99% of ddr4 Will go up 2 bumps.

Set xmp on the ram. Put voltage up 0.100v(1.35v would go to 1.45v)
Then up the ram mutiplyer one step at a time.
Click to expand...

Have you tried overclocking on X99 before?

The Haswell-E memory controller isn't great at high speed, 3000mhz is doable usually on a 5820K but the gains are nothing to single figure percentage depending on what you're doing as X99 has plenty of memory bandwidth due to being quad channel.

It's not just RAM voltage you need to tweak for higher speeds. You may need to fiddle with memory straps and SA voltages to get the frequency you want stable.
 
MaXxBoulton said:
How did you try. I would say 99% of ddr4 Will go up 2 bumps.

Set xmp on the ram. Put voltage up 0.100v(1.35v would go to 1.45v)
Then up the ram mutiplyer one step at a time.
Click to expand...
Pretty much did that, tried 2933Mhz which +1 on all timings and bumped rwm voltage feom 1.2v to 1.35v.

Minstadave said:
Have you tried overclocking on X99 before?

The Haswell-E memory controller isn't great at high speed, 3000mhz is doable usually on a 5820K but the gains are nothing to single figure percentage depending on what you're doing as X99 has plenty of memory bandwidth due to being quad channel.

It's not just RAM voltage you need to tweak for higher speeds. You may need to fiddle with memory straps and SA voltages to get the frequency you want stable.
Click to expand...

Yeah I thought RAM OCing would be less stable with quad channel. I bought this 5820K second hand from a guy who does a lot of DDR4 memory OCing at OCN and he said it had a strong IMC but never looked into it any further. Motherboard and RAM are also second hand from different sellers.
 
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