Corsair Vengeance 2400MHZ Running at 2133Mhz?

[lucaslau66]

System setup

CPU: I7 7700K
MOBO: ASUS B250H
RAM: Corsair Vengeance LPX 16GB x 2 (32GB Total) : Corsair CMK32GX4M2A2400C14
PSU: Corsair 750W CX750M
SSD: SAMSUNG EVO 860 250GB
HDD: Miscellanous
Bios Ver: 1205

From what I understand is to enable 2400Mhz to work, either enable XMP or manually do it?
I have tried enable XMP but I think it gives me Blue screens of death. Is this possible because of the DRAM Voltage too low? The XMP profile is same as normal Mhz of 1.2V. So should I bump up the Voltage and by how much, is it safe?

Also another way I found to make it run 2400mhz is manually selecting DDR4 2400MHZ for DRAM Frequency leaving everything on default which is AUTO I believe. Is this another way to run 2400Mhz and is it safe?

I'm a bit new to this so forgive me being a noob in this field, I'm confused on how or what is the best way to make it run 2400mhz

Thanks.

 

[brispuss]

Yes. What you have done is basically correct.

If XMP setting doesn't seem to work (properly), then raising the DRAM Voltage (by 0.05 V) might help. Don't exceed 1.35 V.

Another thing to try is to simply swap the memory modules in their respective slots. With all BIOS memory settings on AUTO, try XMP setting again.

Setting frequency manually at 2400 MHz and leaving everything else on AUTO which seems to work in this case is fine. In the event that this didn't work either, then raising the DRAM Voltage manually might have helped.

 

[lucaslau66]

Yes. What you have done is basically correct.

If XMP setting doesn't seem to work (properly), then raising the DRAM Voltage (by 0.05 V) might help. Don't exceed 1.35 V.

Another thing to try is to simply swap the memory modules in their respective slots. With all BIOS memory settings on AUTO, try XMP setting again.

Setting frequency manually at 2400 MHz and leaving everything else on AUTO which seems to work in this case is fine. In the event that this didn't work either, then raising the DRAM Voltage manually might have helped.

So raise it by 0.05 V if crash / bsod then keep up it until 1.35v (MAX) until stable?
Also I have swapped the dual modules slots from A2 B2 to A1 B1 but same issue exists for XMP.

Just to clarify because I'm a noob, setting DRAM Frequency manually to 2400Mhz without changing anything but that and leaving XMP off. Is this safe and will it run at 2400Mhz safely?

Many thanks

 

[Calvin7]

Specifications for memory:
Memory Size: 32GB Kit (2 x 16GB)
Tested Latency: 14-16-16-31
Tested Voltage: 1.2V
Tested Speed: 2400MHz

I suggest testing for defective memory with MemTest86. If you get any errors, replace entire kit under warranty.
https://www.memtest86.com/

 

[lucaslau66]

Specifications for memory:
Memory Size: 32GB Kit (2 x 16GB)
Tested Latency: 14-16-16-31
Tested Voltage: 1.2V
Tested Speed: 2400MHz

I suggest testing for defective memory with MemTest86. If you get any errors, replace entire kit under warranty.
https://www.memtest86.com/

I've ran memtest86 twice and it reported back with no errors, but it seems like XMP probably the main cause of bsod's

 

[brispuss]

Running at 2400 MHz is perfectly fine, regardless if set using XMP (which doesn't seem to work properly at 2400 MHz) or if set manually.

And raising just the DRAM Voltage to no more than 1.35V is quite safe.

Did you try swapping the modules in the same two slots? That is, for example, module 1 in slot A2 goes to slot B2, and module 2 in slot B2 goes to slot A2.

The most likely reason the modules XMP is not quite working (at 2400 MHz) is due to variances in characteristics of either the memory modules, or of the memory controller, or of the memory slots/motherboard, or any combination of the previous.

Although relatively rare, memory which manufacturers test for compatibility on same motherboards, may not necessarily work on other same motherboards (with exact same specifications) owing to hardware characteristic variations. The way around this is to either manually make minor adjustments in memory settings in BIOS, or replace the memory kit with another kit and hope that it will be more compatible (most likely so).

 

[lucaslau66]

Someone suggested me to run Prime95 to test it by typing in manually the timings and DRAM Frequency and do a blended test? I've let blended test run overnight and it's been around 13 hours and have not witnessed any crash or bsod, does that mean it's stable? How long do I need to let prime95 run for for blended test? thanks

 

[brispuss]

Maybe up to one day, to be fairly certain that things are OK.

However, I believe the memory is basically fine anyway. The issue is more likely to be very slight incompatibility with the system due to characteristic variations as mentioned previously.

 

[lucaslau66]

It looks like I entered the values manually in , instead of activating XMP and so far I've had no crashes. I guess XMP profile on the RAM stick is possibly the cause of the crash. Does this mean the profile is not compatible with my system or corrupt?

Will it mean I need to replace the sticks or is fine?

Thanks

 

[brispuss]

XMP data could be corrupted, but?

The XMP data would (or should) have been determined from tests made by the module manufacturer using an identical motherboard for the testing process. The determined XMP data settings would work properly on the motherboard used for testing. But as mentioned earlier, there is a very slight chance of those XMP settings not working on another same model of motherboard due to characteristic variations (of memory modules, memory controllers, and memory slots). This type of incompatibility doesn't happen often, but it does occur.

All this means in this case that the module XMP settings appear to be incompatible with the "motherboard". Whether the incompatibility is due to corrupt XMP data, or whether the incompatibility is due to characteristic variations, or whether it is due to both is difficult to say.

If the modules run fine at 2400 MHz (after making some manual settings in BIOS), and you don't mind making manual memory settings in BIOS, then by all means keep the memory modules.

But if it inconvenient to make manual memory settings instead of having the convenience of XMP data doing all the settings for you, then replace the modules.

Did you try swapping the modules in slots A2 and B2 as per my earlier post?