Question My bios shows 16gb of ram but windows only shows 8gb ???

[WontonWilliam]

I am using ryzen 5 2600 corsair vengeance 16gb 2400mhz ram aorus b450m motherboard and rx580 msi oc

 

[boju]

Try reseat ram / switch them. If that doesn't help, might want to loosen the cpu cooler a bit. It might be on too tight. Or there could be a slightly bent cpu pin.

Went through a similar issue the other day if you want to look. Post #67 is when it was finally solved. No definite solution though but one of the suggestions above could be close.

https://forums.tomshardware.com/thr...-bios-and-cpu-z-does.3565772/page-3?view=date

 

[Ferimer]

Make sure you check the manual. Some boards that have 4 ram slots require them to be in specific spots not side by side

 

[WontonWilliam]

yeah they arent side by side

 

[WontonWilliam]

Try reseat ram / switch them. If that doesn't help, might want to loosen the cpu cooler a bit. It might be on too tight. Or there could be a slightly bent cpu pin.

Went through a similar issue the other day if you want to look. Post #67 is when it was finally solved. No definite solution though but one of the suggestions above could be close.

https://forums.tomshardware.com/thr...-bios-and-cpu-z-does.3565772/page-3?view=date

i checked for bent pins when building

 

[boju]

i checked for bent pins when building

Bent pins can happen after installing the cpu. It can happen. See the thread i linked.

 

[boju]

Reseat them anyhow and try switch them around. If nothing else works and ram are in 2nd and 4th slot from cpu then check cpu pins.

Also make sure cooler isn't on too tight.

 

[WontonWilliam]

i checked for bent pins when building

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Reseat them anyhow and try switch them around. If nothing else works and ram are in 2nd and 4th slot from cpu then check cpu pins.

Also make sure cooler isn't on too tight.

but what i dont understand is why the ram is detected fine in bios

 

[boju]

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but what i dont understand is why the ram is detected fine in bios

Same thing happened in that thread. It wasn't 100%. In their case, bios registered all ram but didn't release it all to be usable in Windows.

 

[WontonWilliam]

Same thing happened in that thread.

ok i need to find screwdriver but will attempt things and come back to you

 

[boju]

Try the simple things first though. Switch ram around / reseat them if you haven't tried this step yet.

Clearing cmos is another step you can try.

 

[WontonWilliam]

Try the simple things first though. Switch ram around / reseat them if you haven't tried this step yet.

Clearing cmos is another step you can try.

what is cmos and i reseated ram and cpu cooler

 

[boju]

How to clear cmos / reset bios;

How to Clear Your Computer's CMOS to Reset BIOS Settings

If something has gone wrong, your computer won't POST, and you're at wits end --- don't worry. You can always reset everything back to factory defaults.

www.howtogeek.com

So memory reseated and cooler adjusted. Did you check the pins or just loosened the cooler?

 

[WontonWilliam]

just loosened cooler i dont have spare thermal paste

 

[WontonWilliam]

No hiccups when putting cpu in so shouldnt be problem with pins and checked all pins one by one before putting it in

 

[WontonWilliam]

should i use xmp then or no

 

[WontonWilliam]

after load optimized defaults

 

[boju]

No hiccups when putting cpu in so shouldnt be problem with pins and checked all pins one by one before putting it in

As i said before, a bent pin could have happened as you were installing the cpu. Wouldn't know 100% there isn't at least one that might be bent. Won't know until it is removed and checked.

Try without xmp first, if all ram is read in both Windows and bios then load xmp.

If loading optimised defaults doesn't work, remove the motherboard battery for a few minutes as explained in the guide.

 

[WontonWilliam]

As i said before, a bent pin could have happened as you were installing the cpu. Wouldn't know 100% there isn't at least one that might be bent. Won't know until it is removed and checked.

Try without xmp first, if all ram is read in both Windows and bios then load xmp.

If loading optimised defaults doesn't work, remove the motherboard battery for a few minutes as explained in the guide.

the plot thickens using cpu-z it says 16gb but not windows ten ???

 

[boju]

Not really. The op in the thread i linked also said cpuz read all ram. But when they tested with Msi Afterburner monitoring memory usage in a game, the max ram amount was still 8, same amount Windows recorded. I encourage you to read that thread.

 

[WontonWilliam]

Not really. The op in the thread i linked also said cpuz read all ram. But when they tested with Msi Afterburner monitoring memory usage in a game, the max ram amount was still 8, same amount Windows recorded. I encourage you to read that thread.

ok

 

[WontonWilliam]

Not really. The op in the thread i linked also said cpuz read all ram. But when they tested with Msi Afterburner monitoring memory usage in a game, the max ram amount was still 8, same amount Windows recorded. I encourage you to read that thread.

i have read the thread dont quite understand how its helping ?

 

[WontonWilliam]

Not really. The op in the thread i linked also said cpuz read all ram. But when they tested with Msi Afterburner monitoring memory usage in a game, the max ram amount was still 8, same amount Windows recorded. I encourage you to read that thread.

is msi afterburner showing gpu mem clock or ram mem clock?

 

[WontonWilliam]

so it recently showed 16gb but now shows 8gb yet again

 

[boju]

I suggested seeing that thread because both of your problems are very similar. Most of the suggestions there were repeated here but wanted to see for yourself they too had all ram showing in cpuz & bios. Eventually the problem was solved, most likely them finding a bent pin. Windows now reads all ram for him.

Not that your problem is identical of course, similar yes. That's why i said earlier here, one of the suggestions i suggested there could be it or close. Windows not reading all ram is an unusual problem so tried giving you as much info as i could and things to try / look out for.

With Msi Afterburner just set to see memory usage and see what it gets up to.

Might also want to look at updating motherboard bios too.