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Changed RAM "optimized slots" slots and now PC won't boot!

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Hi LTT Fam,

 

Just did a new build, had windows installed/updated along with most of my apps.  Was working great with no issues!

 

Build specs:

AMD Ryzen 7 5700X  

 

MSI MPG B550 GAMING PLUS (bios version stock, can't see exact version now) 

 

G.Skill Ripjaws V Series 32GB (2 x 16GB) 288-Pin SDRAM (PC4-25600) 

SAMSUNG 980 PRO SSD with Heatsink 1TB PCIe Gen 4 NVMe 

EVGA SuperNOVA 850 T2 220-T2-0850-X1 80+ TITANIUM 850W

RTX 3050

Phanteks Eclipse P500A Case

 


On the the windows install restarts I was getting:

"Memory modules were found on non-optimized slot" and said I should move them.  So I figured what the heck, I'll move them to the slots it wants.

 

So went from slots 1&3(A1/B1) to 2&4(A2/B2) like it suggested.

Power back on, everything lights up/fans spinning and not booting...

I tried the previous RAM positions, 1 stick in every position... nada.

 

Only thing I can think of that I didn't do/possibly messed up was when I switched the RAM to the optimized slots I didn't unplug the power from PSU while I swapped the sticks around. The PC was completely shut down but I understand power is still running into the mobo and things can happen.

 

No power cables were jostled, nothing booped. Could swapping sticks around while it was plugged in fry something?  I build on an anti static mat and always touch the table/case/case metal before sticking my paws in there.

 

Kind of at a loss for what to do next.  Think this is my 8th build or so and never had anything like this happen.  Maybe I should reset the CMOS?  I have heard of that but never actually had to do it and am unsure if it will help.

 

Any ideas you all have would be appreciated.

 

Thanks,

 

Marc

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Yes go with resetting the CMOS, test one stick in an optimized slot, once you can POST add the second and begin setting up the BIOS again such as DOCP / XMP etc

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41 minutes ago, MrMase said:

Yes go with resetting the CMOS, test one stick in an optimized slot, once you can POST add the second and begin setting up the BIOS again such as DOCP / XMP etc

Thanks MrMase!  I will attempt in the morning.  I'm all out of fight for today.

How long have these "optimized slots been a thing?  I've always used slots 1&3 just by default.

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Just now, fryedegg said:

Thanks MrMase!  I will attempt in the morning.  I'm all out of fight for today.

How long have these "optimized slots been a thing?  I've always used slots 1&3 just by default.

1 and 3 are my defaults having been intel builds but when I did an AMD build it was 2 and 4 which caught me off guard

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9 minutes ago, MrMase said:

1 and 3 are my defaults having been intel builds but when I did an AMD build it was 2 and 4 which caught me off guard

It's my 2nd AMD build but my last one used all 4 slots so 1st time this is coming up.

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19 hours ago, fryedegg said:

Thanks MrMase!  I will attempt in the morning.  I'm all out of fight for today.

How long have these "optimized slots been a thing?  I've always used slots 1&3 just by default.

So I cleared the CMOS and yolo'd it with both sticks in the optimized slots and it worked!

I missed the BIOS prompt initially and have been in windows setting up stuff and everything is working great!

So I need to enter into the BIOS and fiddle with anything still?  

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19 minutes ago, fryedegg said:

So I cleared the CMOS and yolo'd it with both sticks in the optimized slots and it worked!

I missed the BIOS prompt initially and have been in windows setting up stuff and everything is working great!

So I need to enter into the BIOS and fiddle with anything still?  

Glad to hear that worked.

As far as the BIOS goes I would look to make the following changes as far as your system allows (adjust terminology as I mainly deal with ASUS)
- Enable XMP / DOCP for Memory overclocking

- Enable Above 4G Encoding

- Enable Resizable Bar

- Set CSM Disabled

- Check Secure Boot Enabled

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