Question Enabling XMP causes my PC to have no display

[Victel]

.SKILL Trident Z5 RGB Series (Intel XMP 3.0) DDR5 RAM 48GB (2x24GB) 8400MT/s CL40-52-52-134 1.40V x2​

ASUS z890 pro art
Windows 11
4090
Intel Ultra 9
BIOS Update 1501

My drivers are all updated and my BIOS are updated. Enabling XMP causes my PC to start but I never have a display, it just runs on a black screen and windows never seems to start until I disable XMP again. Any ideas?

 

[Victel]

AEMP 3 can help for stability at higher speed if you have 4 ram modules installed. What is your configuration exactly? I just read your original post again and do you really have 4 sticks of 24 GB each? If it's the case then no wonder why it's not working with XMP. 8400 MHz CL 40 with 4 sticks? I don't even think it's possible. You will actually have a hard time making it work stable at more than 6400 MHz.

Also, if you have four sticks, did you buy them in two different kits (as your original post suggests)? This is really not good and you should never mix kits together. The rule is that if you want four sticks buy a kit of four.

If you want to run at 6000 MHz and it's stable then leave the voltage as it is. But if you intend to increase the frequency then you should crank it up to 1.4v.

Yes four 24gb sticks they didn't sell a lot of 4 at that speed. Is that bad for them?

 

[JayGau]

Yes four 24gb sticks they didn't sell a lot of 4 at that speed. Is that bad for them?

There's a reason why they don't sell them in kits of four at that speed (see my previous comment).

And mixing kits together is bad because there's nothing that guarantees they are exactly the same. They can have the same model number but being made with different parts from different factories. You might get lucky and it works fine, but you also may get a very unstable built because of this. Manufacturers sell them in kits for this reason: if they come in the same package it's guaranteed they are the same and will work well together. You would have been better to buy a single 4-stick kit with lower speed.

Mixing two 8400 MHz kits of two sticks was pretty much doomed to fail from the beginning.

 

[Victel]

There's a reason why they don't sell them in kits of four at that speed (see my previous comment).

And mixing kits together is bad because there's nothing that guarantees they are exactly the same. They can have the same model number but being made with different parts from different factories. You might get lucky and it works fine, but you also may get a very unstable built because of this. Manufacturers sell them in kits for this reason: if they come in the same package it's guaranteed they are the same and will work well together. You would have been better to buy a single 4-stick kit with lower speed.

Mixing two 8400 MHz kits of two sticks was pretty much doomed to fail from the beginning.

I can take them back. Should I get https://a.co/d/gwNMoj3 or
https://a.co/d/esJ9J9n

What do you suggest?

 

[JayGau]

I can take them back. Should I get https://a.co/d/gwNMoj3 or
https://a.co/d/esJ9J9n

What do you suggest?

I don't know what you want to do with this computer but do you really need 96 GB? I mean even 64 GB is overkill for most users. But if you really need that much then ok.

I would say go with 2 sticks instead of 4 (it's always more stable because it's less demanding on the memory controller). But the kit at 7000mhz has only one review and the person says it didn't work at the advertised speed. Maybe it will work for you, but if you want to make sure, you would be better with slightly lower speed, like this https://a.co/d/3yNV3Jm

 

[Victel]

I don't know what you want to do with this computer but do you really need 96 GB? I mean even 64 GB is overkill for most users. But if you really need that much then ok.

I would say go with 2 sticks instead of 4 (it's always more stable because it's less demanding on the memory controller). But the kit at 7000mhz has only one review and the person says it didn't work at the advertised speed. Maybe it will work for you, but if you want to make sure, you would be better with slightly lower speed, like this https://a.co/d/3yNV3Jm

I'll take your advice on getting the two kit and I guess I'll chance it with that negative review. I use 3DS Max and Unreal Engine and my PC handles massive 3D scenes with tons of shaders.

 

[beyondlogic]

.SKILL Trident Z5 RGB Series (Intel XMP 3.0) DDR5 RAM 48GB (2x24GB) 8400MT/s CL40-52-52-134 1.40V x2​

ASUS z890 pro art
Windows 11
4090
Intel Ultra 9
BIOS Update 1501

My drivers are all updated and my BIOS are updated. Enabling XMP causes my PC to start but I never have a display, it just runs on a black screen and windows never seems to start until I disable XMP again. Any ideas?

Processor is only rated for 6400 anything higher is a overclock did you check that the board actually supported that kit otherwise your flying blind. Turn down the clock from 8400 set it to 6400 see if it posts. If it does you'll just have to increase the clock in by 200 each time till you find a point when it won't post.

 

[JayGau]

Processor is only rated for 6400 anything higher is a overclock did you check that the board actually supported that kit otherwise your flying blind. Turn down the clock from 8400 set it to 6400 see if it posts. If it does you'll just have to increase the clock in by 200 each time till you find a point when it won't post.

We already went through all of this. The op was trying to run 4 sticks from two different 8400 MHz kits. No way that could work. The four sticks are currently running at 6000 MHz but the op doesn't seem very comfortable with manual overclocking. So I recommended to return the kits and get a single 2-stick kit at 6400 MHz, but he wants to take a chance with a 7000 MHz kit.

 

[Victel]

We already went through all of this. The op was trying to run 4 sticks from two different 8400 MHz kits. No way that could work. The four sticks are currently running at 6000 MHz but the op doesn't seem very comfortable with manual overclocking. So I recommended to return the kits and get a single 2-stick kit at 6400 MHz, but he wants to take a chance with a 7000 MHz kit.

Do you think it's possible xmp can get me to 7000MHz on the two stick kit?

 

[JayGau]

Do you think it's possible xmp can get me to 7000MHz on the two stick kit?

As beyondlogic pointed out, the Core Ultra 9 is rated to 6400 MHz, which means that it's the maximum value it officially supports. You may be able to run at 7000 MHz but it's not guaranteed. It's why I suggested 6400 MHz, which is officially supported.

 

[Victel]

As beyondlogic pointed out, the Core Ultra 9 is rated to 6400 MHz, which means that it's the maximum value it officially supports. You may be able to run at 7000 MHz but it's not guaranteed. It's why I suggested 6400 MHz, which is officially supported.

Is the 7000MHz problematic for my CPU or is worse case it's simply not supported? XMP could be an option permitting that speed I'm guessing it's just a question on whether or not it works

 

[JayGau]

Is the 7000MHz problematic for my CPU or is worse case it's simply not supported? XMP could be an option permitting that speed I'm guessing it's just a question on whether or not it works

Not supported means that the company doesn't guarantee it will work. The XMP profile is saved on the RAM stick. Your motherboard reads it and applies the settings, it doesn't care if it's supported or not. So three things can happen:

-It works, it's stable, you're lucky.
-It boots but it's unstable and you get app and PC crashes more or less often depending on how unstable it is.
-It doesn't work at all so it doesn't boot (it's what you got with the 8400 MHz).

With an unsupported RAM speed, one of the last two scenarios is more likely to happen than the first one. You can still try it, but be prepared for a high probability that it doesn't work, while with a 6400 MHz kit it will most likely work.

 

[Victel]

Not supported means that the company doesn't guarantee it will work. The XMP profile is saved on the RAM stick. Your motherboard reads it and applies the settings, it doesn't care if it's supported or not. So three things can happen:

-It works, it's stable, you're lucky.
-It boots but it's unstable and you get app and PC crashes more or less often depending on how unstable it is.
-It doesn't work at all so it doesn't boot (it's what you got with the 8400 MHz).

With an unsupported RAM speed, one of the last two scenarios is more likely to happen than the first one. You can still try it, but be prepared for a high probability that it doesn't work, while with a 6400 MHz kit it will most likely work.

I can't cancel this order since it's been shipped so I can try it. I'm going to run some ram tests when I get it and I'll try and enable XMP and run further tests with that on. Is there any specific tests you recommend or things to watch out for? I'm predicting it will be like with these ram kits where they work and test fine but they don't get the advertised speed or allow me to enable XMP. I can do this or I can wait and receive them and send them back and get the 6400MHz kit you're advising. My question is it worth the trouble or should I just get 6400MHz?

 

[JayGau]

I can't cancel this order since it's been shipped so I can try it. I'm going to run some ram tests when I get it and I'll try and enable XMP and run further tests with that on. Is there any specific tests you recommend or things to watch out for? I'm predicting it will be like with these ram kits where they work and test fine but they don't get the advertised speed or allow me to enable XMP. I can do this or I can wait and receive them and send them back and get the 6400MHz kit you're advising. My question is it worth the trouble or should I just get 6400MHz?

Running ram test before enabling XMP is not really useful. It will be a brand new kit running at the default 4800 MHz so it will very likely be ok. Since you will have it, you can try to enable XMP and see if boots. If it doesn't, you gonna be in the same situation you were with the 8400 MHz kit. If it boots, you can run some stress tests for several minutes and see if the computer holds.

I like to use the AIDA64 stress test because it loads both the CPU and the RAM at 100% and if it detects an instability it stops the test and displays a message saying a hardware problem got detected. You can also use Prime95 that does pretty much the same thing and notify you if there are problems. Another test would be the Windows built-in memory diagnostic test (just type "Window memory" in the WIndows search box to find it).

If you don't want to go through all of this, just return it and get the 6400 MHz. Retailers usually don't mind replacing items that have not been opened.

 

[Victel]

Running ram test before enabling XMP is not really useful. It will be a brand new kit running at the default 4800 MHz so it will very likely be ok. Since you will have it, you can try to enable XMP and see if boots. If it doesn't, you gonna be in the same situation you were with the 8400 MHz kit. If it boots, you can run some stress tests for several minutes and see if the computer holds.

I like to use the AIDA64 stress test because it loads both the CPU and the RAM at 100% and if it detects an instability it stops the test and displays a message saying a hardware problem got detected. You can also use Prime95 that does pretty much the same thing and notify you if there are problems. Another test would be the Windows built-in memory diagnostic test (just type "Window memory" in the WIndows search box to find it).

If you don't want to go through all of this, just return it and get the 6400 MHz. Retailers usually don't mind replacing items that have not been opened.

I will run those tests then. I was just checking the compatibility for the kit I ordered. Although the one I ordered specifically isn't listed, another by corsair running at 7000MHz is listed. CMH96GX5M2B7000C40, seems to have the same specs as mine. It's listed as being compatible with XMP x2 48 gb sticks of RAM. Mine is CMP96GX5M2B7000C40. I wanted to know your thoughts on this, maybe I'm not interpreting its specs correctly. The page I'm referencing is https://www.asus.com/us/motherboard...vl_memory?model2Name=ProArt-Z890-CREATOR-WIFI

 

[JayGau]

I will run those tests then. I was just checking the compatibility for the kit I ordered. Although the one I ordered specifically isn't listed, another by corsair running at 7000MHz is listed. CMH96GX5M2B7000C40, seems to have the same specs as mine. It's listed as being compatible with XMP x2 48 gb sticks of RAM. Mine is CMP96GX5M2B7000C40. I wanted to know your thoughts on this, maybe I'm not interpreting its specs correctly. The page I'm referencing is https://www.asus.com/us/motherboard...vl_memory?model2Name=ProArt-Z890-CREATOR-WIFI

You are looking at the support for your motherboard, which is compatible with a wide range of RAM and CPUs (Intel 15 and 16th gens). Your CPU, the Core Ultra 9, officially supports 6400 MHz (and only with CUDIMM apparently, standard DDR5 is only supported up to 5600 MHz). But Intel itself says that the CPU should be able to support faster than that (especially with CUDIMM). So you can try with the 7000 MHz kit. With 2 sticks at 7000 MHz you might have more luck than with the 4 sticks at 8400 MHz.

 

[Victel]

You are looking at the support for your motherboard, which is compatible with a wide range of RAM and CPUs (Intel 15 and 16th gens). Your CPU, the Core Ultra 9, officially supports 6400 MHz (and only with CUDIMM apparently, standard DDR5 is only supported up to 5600 MHz). But Intel itself says that the CPU should be able to support faster than that (especially with CUDIMM). So you can try with the 7000 MHz kit. With 2 sticks at 7000 MHz you might have more luck than with the 4 sticks at 8400 MHz.

and at least the two stick kit I got isn't mixing kits so maybe that's something