HyperX Predator 4000MHZ (XMP Profile not working)

[richintheveins]

Hey guys my XMP profile to rate my ram @ 4000mhz keeps crashing my PC. I am able to use XMP profile 1 @ 3600mhz no problem. I need to also disclose that I'm using two 16 GB dual sets running them in dual channel equaling 32 GB of ram on board. Should I increase my ram voltage slightly from 1.35 to see if it will stabilize? In its current state when XMP profile II is enabled it almost immediately gives me a blue screen once it boots in windows. 

 

I have not tried to run only 1 dual set as it would defeat the purpose since I purchased two sets. I am willing to do so if anyone thinks it would be beneficial. 

 

Any ideas would be great. 

[.Apex.]

11 minutes ago, richintheveins said:

Hey guys my XMP profile to rate my ram @ 4000mhz keeps crashing my PC. I am able to use XMP profile 1 @ 3600mhz no problem. I need to also disclose that I'm using two 16 GB dual sets running them in dual channel equaling 32 GB of ram on board. Should I increase my ram voltage slightly from 1.35 to see if it will stabilize? In its current state when XMP profile II is enabled it almost immediately gives me a blue screen once it boots in windows. 

 

I have not tried to run only 1 dual set as it would defeat the purpose since I purchased two sets. I am willing to do so if anyone thinks it would be beneficial. 

 

Any ideas would be great. 

Try taking two of them out first and if it works then put them back and increase the VCCSA and VCCIO to 1.2-1.25 and increase the DRAM Voltage to 1.38-1.4, if it works then figure out which of these voltages are causing the instability to avoid unnecessary overvolting.

 

Technically though you only need to touch VCCIO to stabilize the RAM but it wouldn't hurt to test.

[rcmaehl]

From the ROG forums:

Quote

The XI Hero is a T-Topology motherboard.
a. You'd need to run it in a 4DIMM config to minimise [sic] clock skew to run its maximum rated memory frequency, 2 DIMM frequency yields are lower
b. Use slots A2B2 on 2 DIMMs
c. There are also considerations for the memory controller capability.
d. Raja@asus cites 3600MHz as the top "plug and play" frequency about a year ago or two.

Manual tuning is a requirement despite the XMP rating.

 

I would recommend following the link at the top of this comment.

Additionally: https://rog.asus.com/forum/showthread.php?98041-Understanding-and-using-XMP

 

You can try what @_Syn_ suggested as well

[porina]

If this is the same set I have, which also has XMP profiles at 3600 and 4000, you might find that it actually gives better performance at 3600. I'm only running two sticks, and found this behaviour consistent on both Intel and AMD systems. My suspicion is they had to relax some timing too much to reach 4000, that 3600 with tighter timings wins out. This even applies to Prime95 which is bandwidth starved.

[richintheveins]

2 hours ago, porina said:

If this is the same set I have, which also has XMP profiles at 3600 and 4000, you might find that it actually gives better performance at 3600. I'm only running two sticks, and found this behaviour consistent on both Intel and AMD systems. My suspicion is they had to relax some timing too much to reach 4000, that 3600 with tighter timings wins out. This even applies to Prime95 which is bandwidth starved.

That would suck if this is true for me because the ram I purchased wasn't cheap. It does seem to run perfectly fine @ 3600 though. 

[richintheveins]

3 hours ago, _Syn_ said:

Try taking two of them out first and if it works then put them back and increase the VCCSA and VCCIO to 1.2-1.25 and increase the DRAM Voltage to 1.38-1.4, if it works then figure out which of these voltages are causing the instability to avoid unnecessary overvolting.

 

Technically though you only need to touch VCCIO to stabilize the RAM but it wouldn't hurt to test.

Hey Thanks! I will give this a try when I get home. I def need to take out two of the sticks first and see if it stabilizes. From there I will use your suggestions. 

[richintheveins]

3 hours ago, rcmaehl said:

From the ROG forums:

 

I would recommend following the link at the top of this comment.

Additionally: https://rog.asus.com/forum/showthread.php?98041-Understanding-and-using-XMP

 

You can try what @_Syn_ suggested as well

Thanks for the links! I will read them when I get a chance. All good stuff to get me started in the right direction. 

[richintheveins]

Hey everyone I'm back after testing. I had some questions. It took quite a bit of time to get the 2 ram kits stable (mostly due to rookie mistakes). The XMP profiles didn't work unless I pushed the voltage too high for my taste.  I finally got the ram sticks to run with manual settings at the following timings. 

 

Mode 2

Cas# lantency:            17
Ras# to Cas# delay:   17
Ras# act time:             37

Comand Rate:          N2

DRam V: 1.42           

IO: 1.18

SA: 1.25

 

I ran memtest86 for 24 hrs 6 passes. No errors.

 

Do you think I could tighten up the timings more? Right now I think they look pretty darn good but any thoughts would be extremely helpful.