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elstaci
MVP

Re: Installed 16GB RAM and only 7,97GB useable

The only time that I would personally suggest installing a "Clean" Windows OS is if all other methods failed, as a last resort. If you google, if you need to do a clean install of Windows when changing or updating the CPU, you will find that they all say YOU DON"T.  in this case, you are installing basically two very similar CPUs. Both from the FX series.

If you installed the FX4xxx and it worked perfectly than the FX8xxx should do the same. I suspect the FX8xxx is defective or your RAM is not compatible with the FX8xxx.

I updated my CPU from a Athlon II Phenom 6 core to a FX8350 8 core without installing Windows and it work perfectly.

BUT the good thing about installing a Clean Windows OS, it will eliminate software as the problem and show it is hardware related.

Unlike some Users that believe that installing a Clean Windows is the FIRST step whenever a CPU is changed. Whether it needs it or not. That it ONLY TAKES A FEW MINUTES. Yes, if you have a souped up PC with extremely fast CPU and RAM and SSD and no personal APPs to install again. On my computer it takes at least, close to an hour, due to Windows, during installation, has to download Updates first and then start the installation. Plus it doesn't take a FEW MINUTES to reinstall 30 or more personal APPs again plus configure all those APP and the new Windows.

On very rare occasions, doing a Clean Windows does fix hardware and software issues due to Windows being corrupted. But if you follow this forum and others, you will find out most Users do a clean Windows install, sometimes several times, without fixing the software or hardware issues they are having.

But there is no harm in doing a Clean Windows install, if you don't mind the hassle involved reinstalling and configuring all your APPs and Windows again.

There is very little or no evidence about some Users claim that you HAVE to do a clean Windows installation whenever changing or upgrading CPUs on the same motherboard as a FIRST step, whether it needs it or not.

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misterj
Exemplar

Re: Installed 16GB RAM and only 7,97GB useable

You were lucky, shibbbbby.  Do as you like, but remember what has been said about stale Windows installations.  Enjoy, John.

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elstaci
MVP

Re: Installed 16GB RAM and only 7,97GB useable

Yes, Please do show us by reminding us again what has been said about stale windows installations.  I would be very interested in seeing what situations they were referring too concerning stale Windows installation.

Please show shibbbbby links to prove you are correct about installing Clean Windows after upgrading a CPU on the same motherboard as the first choice for troubleshooting or just reasons for installing a Clean Windows after changing CPUs. That way, both me and the OPS, will be educated whenever we decide to upgrade or replace a defective CPU on the same motherboard.

In this case, Shibbbby has tried most everything so installing a clean Windows may be his next step. But he already mentioned that he installed his current version of Windows with the FX8xxx.

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Hardwood
Paragon

Re: Installed 16GB RAM and only 7,97GB useable

Maybe I missed it, but did you clear your cmos and load in defaults after changing cpu?

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shibbbbby
Adept I

Re: Installed 16GB RAM and only 7,97GB useable

Yes I did. After all this i even changed the Motherboard to a new one. Thanks to ASRPOCK to exchange it!

But it was still the same.

I am stucked now, beause I installed windows on a seperate hard drive and it still does not work.

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dbose8230
Journeyman III

Re: Installed 16GB RAM and only 7,97GB useable

It's really simple.....just interchange the RAM positions on the slots.

For example: If RAM A is in slot 1 put it into slot 2 and vice versa.

This totally worked for me. 

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