Black screen before login and general system slowdown

[frederickofprussia]

Hello, i posted a thread before, but the issue persists, i completely wiped my HDD clean, reinstalled windows 7 64 bit, yet it's still there, i know RAM isn't the issue, but i don't know, the issue appeared just a couple of days ago... can Hardware issues be that sudden? What type of hardware failure could cause this? Note that the black screen is only for a while, but it's still weird, i also note a high disk activity when it shouldn't be doing anything. Please help!

Specs
CPU: AMD Phenom II 965 BE 3.4 Ghz
GPU: XFX Radeon HD 7850 1 GB
MOBO: Gigabyte 990FXA UD3 AM3+
HDD: Seagate 1 TB
RAM: Corsair Vengeance 8 GB
PSU: Seasonic M1211 650 watt 80+ bronze

 

[plaintuts]

Please check your bios. Look for hdd controller set it to aschi instead of ide.

 

[frederickofprussia]

If you don't mind me asking what diffirence does that make?

EDIT: Tried it, didn't work, it prevented my PC from booting entirely, got it back in IDE atm.

 

[plaintuts]

Ide is the old boot protocol for older versions of windows,. Well if its not much trouble reinstall windows using ahci ("i think this is the correct acronym") will fix this.