• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

7950X3D - Weird ram behavior

rexehuk

rexehuk

rexehuk

Soldato
Joined
13 Jun 2009
Posts
4,239
Location
My own head
Putting this thread up to capture anyone else getting RAM issues with the 7950/7900X3D chips.

I'm running the following:
  • 7950X3D
  • Asus B650E-E (Running 1222 bios)
  • 32GB Gskill 6000 CL30 ram
  • Sapphire 7900XTX Nitro+
  • Corsair 1000W RMX
After installing the rig and booting following a bios flash, I experienced a C5 error. I purchased the RAM from someone here, so I know it was working perfectly fine in their system and naturally dived into the fact that the RAM might have an issue as everything was new.

I'm able to run the system on a single stick in A2 or B2, but one of the sticks will run in neither slot, which makes me think it could be a RAM issue. However after seeing this video (https://www.youtube.com/watch?v=M5rkxxqzKRk) and seeing that they used 4 different DDR5 kits I'm wondering if my conclusions could be wrong.

I've not try reseating the CPU because the PC works perfectly fine on the other stick in any position, but curious on thoughts if that could still be a factor (I'd expect weird behaviour with either stick with a cpu mount issue?)

Is anyone else seeing C5 ram issues with these new chips?
 
Last edited:
rexehuk said:
Putting this thread up to capture anyone else getting RAM issues with the 7950/7900X3D chips.

I'm running the following:
  • 7950X3D
  • Asus B650E-E (Running 1222 bios)
  • 32GB Gskill 6000 CL30 ram
  • Sapphire 7900XTX Nitro+
  • Corsair 1000W RMX
After installing the rig and booting following a bios flash, I experienced a C5 error. I purchased the RAM from someone here, so I know it was working perfectly fine in their system and naturally dived into the fact that the RAM might have an issue as everything was new.

I'm able to run the system on a single stick in A2 or B2, but one of the sticks will run in neither slot, which makes me think it could be a RAM issue. However after seeing this video (https://www.youtube.com/watch?v=M5rkxxqzKRk) and seeing that they used 4 different DDR5 kits I'm wondering if my conclusions could be wrong.

I've not try reseating the CPU because the PC works perfectly fine on the other stick in any position, but curious on thoughts if that could still be a factor (I'd expect weird behaviour with either stick with a cpu mount issue?)

Is anyone else seeing C5 ram issues with these new chips?
Click to expand...

I've had 'issues' every now and again, same Mobo/CPU/RAM.

Just now for example, went to run the latest Ryzen Master sofware (release today and now supports overclocking on the 7950X3D), it wanted to reboot to set something in the BIOS and BAM... wouldn't POST and stuck at C5.. 3 power off/on cycles by me and still C5..

So I did a CMOS Clear (turn off PSU switch, hold Clear CMOS for 5 seconds, then apply power again and boot), it trained and straight in to the BIOS.

I had this when messing with MCLK settings and had enabled 'Memory Context Restore' which I then had to CMOS Clear to reset.

Touch wood, after stopping messing and having done a CMOS Clear, it seems to be fairly stable (no issues playing games for about 8 hours so far).

I wondered if my board might be faulty after I watched that video this morning and also wondered about my CPU.. Only if a full CMOS clear didn't work (remember to ensure the PSU is powered off, the motherboard RGB needs to be 'off' before pressing the Clear CMOS button) would I bother doing that, as I had already checked it was seated correctly when installing..

My other thought is the AIO Cooler (EK CR360) just says to tighten the retaining screws, it does not say to only do these finger tight or not to us a tool, I presume they are mechanically designed to bottom out and have springs that will apply the last bit of pressure..
 
Last edited:
I’ve just built mine today and had this twice. I powered off and cleared CMOS and it worked but it took ages to come back on. I’ve not touched anything yet in terms of bios etc other than Expo. I’ve not had much time to test anything yet but I’m surprised at how low the temps are.

Hopefully yours is a simple fix.
 
Harshell123 said:
I’ve just built mine today and had this twice. I powered off and cleared CMOS and it worked but it took ages to come back on. I’ve not touched anything yet in terms of bios etc other than Expo. I’ve not had much time to test anything yet but I’m surprised at how low the temps are.

Hopefully yours is a simple fix.
Click to expand...
What are your idle temps in the BIOS? Mine where mid-high 30's, but noticed today they are in the 40's.

[edit] - Silly me, the AIO pump was running at 2200RPM instead of 3000RPM.. all good now!
 
Last edited:
Demon said:
What are your idle temps in the BIOS? Mine where mid-high 30's, but noticed today they are in the 40's.

[edit] - Silly me, the AIO pump was running at 2200RPM instead of 3000RPM.. all good now!
Click to expand...
Mine were mid 30’s. I set all my fans to full straight away ready for some stress testing hopefully tomorrow or Friday. Just going to test things at stock, a few games and see how everything is. Then some benchmarks to get a baseline and off I go for the next week or so into the dialling in stages.

What’s your sp number?
 
Harshell123 said:
Mine were mid 30’s. I set all my fans to full straight away ready for some stress testing hopefully tomorrow or Friday. Just going to test things at stock, a few games and see how everything is. Then some benchmarks to get a baseline and off I go for the next week or so into the dialling in stages.

What’s your sp number?
Click to expand...
I've not checked that! Is it still under AI Overclocking in the BIOS? I'm 35% the way through the per core CO optimisation, so can't reboot!
 
Harshell123 said:
Mine were mid 30’s. I set all my fans to full straight away ready for some stress testing hopefully tomorrow or Friday. Just going to test things at stock, a few games and see how everything is. Then some benchmarks to get a baseline and off I go for the next week or so into the dialling in stages.

What’s your sp number?
Click to expand...
Just checked, SP = 110, Cooler = 170
 
Demon said:
I've had 'issues' every now and again, same Mobo/CPU/RAM.

Just now for example, went to run the latest Ryzen Master sofware (release today and now supports overclocking on the 7950X3D), it wanted to reboot to set something in the BIOS and BAM... wouldn't POST and stuck at C5.. 3 power off/on cycles by me and still C5..

So I did a CMOS Clear (turn off PSU switch, hold Clear CMOS for 5 seconds, then apply power again and boot), it trained and straight in to the BIOS.

I had this when messing with MCLK settings and had enabled 'Memory Context Restore' which I then had to CMOS Clear to reset.

Touch wood, after stopping messing and having done a CMOS Clear, it seems to be fairly stable (no issues playing games for about 8 hours so far).

I wondered if my board might be faulty after I watched that video this morning and also wondered about my CPU.. Only if a full CMOS clear didn't work (remember to ensure the PSU is powered off, the motherboard RGB needs to be 'off' before pressing the Clear CMOS button) would I bother doing that, as I had already checked it was seated correctly when installing..

My other thought is the AIO Cooler (EK CR360) just says to tighten the retaining screws, it does not say to only do these finger tight or not to us a tool, I presume they are mechanically designed to bottom out and have springs that will apply the last bit of pressure..
Click to expand...
Strange.

I've just had my ram RMA approved so see if that fixes the issue, if not then I'll go through reseat and AIO fitting and see if that resolves it before looking at mobo RMA (how Jay solved it).

Like you, with my Deepcool LT520 there is no guidance on tightening the cooler. It has thumbscrews but they have phillips heads so tightened them up past finger tight, can't find any guidance on their website.
 
rexehuk said:
Strange.

I've just had my ram RMA approved so see if that fixes the issue, if not then I'll go through reseat and AIO fitting and see if that resolves it before looking at mobo RMA (how Jay solved it).

Like you, with my Deepcool LT520 there is no guidance on tightening the cooler. It has thumbscrews but they have phillips heads so tightened them up past finger tight, can't find any guidance on their website.
Click to expand...
For my Arctic Cooler Freezer II it has the same screws. I did them up by hand and then hand tightened with a screwdriver. I tightened each screw going around the cooler tightening them in increments until there was sufficient resistance without overdoing it.
 
rexehuk said:
Strange.

I've just had my ram RMA approved so see if that fixes the issue, if not then I'll go through reseat and AIO fitting and see if that resolves it before looking at mobo RMA (how Jay solved it).

Like you, with my Deepcool LT520 there is no guidance on tightening the cooler. It has thumbscrews but they have phillips heads so tightened them up past finger tight, can't find any guidance on their website.
Click to expand...
It does sound like your RAM.. but it does make you paranoid! Did you try the one stick that did work at EXPO settings (6000MT/s)? If that worked, it has to be the RAM or it's possessed.. ;)

I did double check the AIO and instructions and I was correct, it uses the words 'fully tighten' and indeed the entire purpose of the spring is to provide uniform force on each corner when bottomed out.. I did loosen it slightly as a trial, but absolutely no change what-so-ever in temps which is mid 30's in the BIOS (windows has crept up at idle with HW Info etc running to 45-48 most of the time for Tctl, but the CCDs themselves are quite cool and the ASUS socket temp probe is still in the 30's..)

I've been doing more CO Undervolting tests last night and actually the only time I've had C5 is Ryzen Master, when it reboots to do reset / change something in the BIOS it always C5's. However, nothing I set EXPO I / EXPO II myself ever caused a C5, just retraining, it's seemingly quite stable, the only crashes have been when doing CO offsets < -30 on some cores but nothing that looks memory related at all.

I can't say I'm ecstatic about the impact on boot of memory training, but when it's dialled in it's just something to get used to..
 
This thread is an example of the early adopter woes. I think I'll skip this round and wait until the next round of AM5 stuff comes out.

Ryzen 1 was the same, early issues that were nearly all sorted by the time the 2*** Ryzens came out.

Nothing that the 5900x is struggling with just now tbh so happy to wait and watch.
 
Has any if this been happening with other brand of motherboards. From my quick read through I see everyone including jayztwocents are using ASUS. Maybe someone with a non ASUS board can report on it?

Jay even replaced his motherboard with the exact same model so in a week or so he might be reporting back with the same problem or ASUS have got in touch and sent him some sweeteners out so he doesn't report it. We know how youtubers deal with RMAs.
 
D1craig said:
Has any if this been happening with other brand of motherboards. From my quick read through I see everyone including jayztwocents are using ASUS. Maybe someone with a non ASUS board can report on it?

Jay even replaced his motherboard with the exact same model so in a week or so he might be reporting back with the same problem or ASUS have got in touch and sent him some sweeteners out so he doesn't report it. We know how youtubers deal with RMAs.
Click to expand...

Just google "AM5 DDR5 stabililty" and append any brand after that and all will be revealed (hint, it's not brand specific!)..

I get your sentiment with J2C, you always have to take things with a pinch of salt, but he can't be shilling too badly or he'd never have released that video in the first place..
 
Last edited:
Demon said:
It does sound like your RAM.. but it does make you paranoid! Did you try the one stick that did work at EXPO settings (6000MT/s)? If that worked, it has to be the RAM or it's possessed.. ;)

I did double check the AIO and instructions and I was correct, it uses the words 'fully tighten' and indeed the entire purpose of the spring is to provide uniform force on each corner when bottomed out.. I did loosen it slightly as a trial, but absolutely no change what-so-ever in temps which is mid 30's in the BIOS (windows has crept up at idle with HW Info etc running to 45-48 most of the time for Tctl, but the CCDs themselves are quite cool and the ASUS socket temp probe is still in the 30's..)

I've been doing more CO Undervolting tests last night and actually the only time I've had C5 is Ryzen Master, when it reboots to do reset / change something in the BIOS it always C5's. However, nothing I set EXPO I / EXPO II myself ever caused a C5, just retraining, it's seemingly quite stable, the only crashes have been when doing CO offsets < -30 on some cores but nothing that looks memory related at all.

I can't say I'm ecstatic about the impact on boot of memory training, but when it's dialled in it's just something to get used to..
Click to expand...
Not tried EXPO actually was waiting for 2 sticks but might give it a whirl.

Definitely, a kick in the face when you've spent 3k, but also expected when we're operating at the edges of desktop right now.
 
rexehuk said:
Not tried EXPO actually was waiting for 2 sticks but might give it a whirl.

Definitely, a kick in the face when you've spent 3k, but also expected when we're operating at the edges of desktop right now.
Click to expand...
Better the ram than the CPU. You would have more of a wait on your hands.

It’s crap when you are waiting, and probably have already waited, but you will sharp get sorted. ;)

Pssst it could be worse, you could be Dave, he’s not even got one yet :D
 
You must log in or register to reply here.
Back
Top Bottom