my ddr4 corsair vengeance rgb pro 3000 MHz ram is rated at cas latency 15 and that's what the bios reads, but all programs within windows reads cas latency 16, programs like cpu-z, aida 64, hwinfo, and ryzen master. very weird, need help.
I think the xmp is active, but I do remember docp being active as well.Are you using DOCP/XMP to set memory ?
DOCP is AMD's "speak" for XMP. It's supposed to set memory according to it's XMP profile.I think the xmp is active, but I do remember docp being active as well.
so what do you think is causing it?DOCP is AMD's "speak" for XMP. It's supposed to set memory according to it's XMP profile.
Some programs read only what's in the SPD and XMP in RAM, not what is actually running at. I don't know about your BIOS but mine shows two values for latency, intended as XMP or SPD would have and another which is present setting.so what do you think is causing it?
what do you think I should or can do?Some programs read only what's in the SPD and XMP in RAM, not what is actually running at. I don't know about your BIOS but mine shows two values for latency, intended as XMP or SPD would have and another which is present setting.
I had my earlier RAM running at CL15 but this one despite it's XMP showing that it should be Cl 17 DOCP sets it at CL16. That's on 2nd gen though, 1700x on x370 MB wouldn't boot over 3200MHz anyway.
I'd like to se a picture of your BIOS memory settings.
ya, I got the ram overclocked at c16 3200 mhz. stable.From what I've read that is caused by Ryzen CPUs only liking even CAS timings (C14, C16, C18).
I've seen quite a few other posts about this same issue and no one got the RAM to actually run at CAS 15 on a Ryzen system that I am aware of.
Honestly it won't make much if any real world difference anyways.
I would try and see if that RAM will run at 3200 MHz at C16.
You can use Thaiphoon Burner to get your RAM specs then use the DRAM Calculator to get the settings needed to OC it if is possible.
also, im using a 1st gen ryzen 1700x cpu on a b450 board. and I read that 1st gen ryzen is more picky on ram.I had my earlier RAM running at CL15 but this one despite it's XMP showing that it should be Cl 17 DOCP sets it at CL16. That's on 2nd gen though, 1700x on x370 MB wouldn't boot over 3200MHz anyway.
Hynix m-die based Kingston 3000 was working fine with 1600x and 1700x on my x370 based Asus MB. Although not able to get more than 2933 MHz out of it I did manage CL12 with it giving it same performance as if it was at (not very stable ) 3200MHz.another thing I found out is that Hynix memory is more stable with my system then Samsung.
ya, i think ill keep it at 3200 mhz. thats a good enough bump from 3000 mhz for me, or maybe ill try for 3400 mhz, but thats as far as ill go.Hynix m-die based Kingston 3000 was working fine with 1600x and 1700x on my x370 based Asus MB. Although not able to get more than 2933 MHz out of it I did manage CL12 with it giving it same performance as if it was at (not very stable ) 3200MHz.
Ryzen is happy with 3200MHz and low Cl, when I benchmarked my Ryzens (had 1600x and 1700x too) 3600MHz benchmarks like CB r15, r20 and Performance Test show only about 2% better scores than with RAM at 3200MHz. As that's only synthetic measure, in real work it must be much less.ya, i think ill keep it at 3200 mhz. thats a good enough bump from 3000 mhz for me, or maybe ill try for 3400 mhz, but thats as far as ill go.
ill go for 3400 MHz and stop there.Ryzen is happy with 3200MHz and low Cl, when I benchmarked my Ryzens (had 1600x and 1700x too) 3600MHz benchmarks like CB r15, r20 and Performance Test show only about 2% better scores than with RAM at 3200MHz. As that's only synthetic measure, in real work it must be much less.
Whatever is most stable, no use for speed if it blue screens all the time.ill go for 3400 MHz and stop there.
very trueWhatever is most stable, no use for speed if it blue screens all the time.
if i go and buy another kit of the same ram, same timings etc. do you think there is a good chance of it working?Whatever is most stable, no use for speed if it blue screens all the time.
Yes, chances are greatly increased. DDR4 is pretty forgiving, just make sure you reset CMOS after adding them in.if i go and buy another kit of the same ram, same timings etc. do you think there is a good chance of it working?
i forgot to mention that the ram i might get is exactly the same except that the kit is 16gb 2x8 not 32gb is that still ok if the timings etc are the same?Yes, chances are greatly increased. DDR4 is pretty forgiving, just make sure you reset CMOS after adding them in.