Brand new R3 2200g build running slower than my old potato PC

[evangamingpc]

Ever since I built this new system I have experienced multiple problems such as: Only 2 of my 4 cores working, only 2gb of my 8gb of ram being usable, CPU temps running unusually high etc. My question is why the hell is it running so slow?! I have fixed all of the problems listed above but I have tried everything. I have moved my OS onto a new drive, reinstalled all of my games, defragged all of my drives and system, looked through the bios and found nothing wrong, installed a graphics card in place of the onboard graphics, overclocked the processor and it was no faster, made sure my ram was dual channel ddr4 2800mhz, reset CMOS, deleted bloat-ware, checked for viruses. I'm stumped guys, and I am by no means an expert, just an enthusiast. I hope you can help me.

PC SPECS:
AMD R3 2200g APU @ 3.9ghz stable w/ OEM wraith cooler
Gigabyte AX370-GAMING motherboard
8gb (2x4gb) G.skill ripjaws V DDR4 2800mhz dual channel
Corsair CX 450 PSU
1.0tb WD Blue HDD 7200rpm 64mb cache
(temporary) AMD R7 250 oc
BIOS ver. F20

 

[drivinfast247]

What do you mean by "running slow"? How have you compared or to your old computer? What benchmarks have you ran?

 

[ElectrO_90]

Fresh windows install or not?
BIOS latest?
no \!/ marks under Device Manager?

 

[evangamingpc]

Fresh windows install or not?
BIOS latest?
no \!/ marks under Device Manager?

No, this is the OS from my old pc (an hp prebuilt tower with 4gb ddr2 ram and a r7 250) that i used the hdd as a boot drive and then transfered it to the new one and the bios is F20 and no \!/ in device manager

 

[J_E_D_70]

^ that is the issue. Needs a clean install.

 

[evangamingpc]

What do you mean by "running slow"? How have you compared or to your old computer? What benchmarks have you ran?

^ that is the issue. Needs a clean install.

do i have to buy a new OS? or is there another way?

 

[drivinfast247]

If you have the key from the old system it might work. It's worth a shot.

 

[ElectrO_90]

You can download windows 10 from microsoft website
if you got a KEY on your computer somewhere (normally a sticker) then you should be able to use it again, but it's not always possible.
But you need 100% new install of windows.

 

[vMax]

Buy a new Windows 10 PRO key from ebay for less the $10. They are 100% legit keys and I am on my 4th for various builds...Never had any issues..

 

[J_E_D_70]

Prebuilt is unlikely to transfer but worth a shot.

If you don’t have $100 for the OS, just run it without a key til you can. Locks out some customization but doesnt impact performance.