390 doesnt have UEFI bios. Its legacy only no ahci and no GPT booting.  That's not required to use win10. There are no WIN10 drivers only WIN7 Cab file with all the drivers that need to be moved to my documents folder then extracted with 7zip.  Download the cab file and move to my documents folder.  Then right click the cab file with 7zip and say extract here. [URL]   [URL] Once Region code is set for the DVD it will boot and install OEM System builder DVD WIN10 with the I dont have a key option. [URL]   The Serial PS2 Port Adapter from Dell™ adds PS2 functionality to your system. This product has been tested and validated on Dell systems. It is supported by Dell Technical Support when used with a Dell system.Dell Y9001 - OptiPlex Serial P/S2 Add-In Card Assembly Dell Serial P/S2 Add-In Card and Cable Assembly for Select OptiPlex Systems, Low Profile, SFF, Desktop, MT, Add-In Card, Dell Y9001, N3563.  [URL] MT [URL]   Y9003 is the full height PS2 Adapter board [URL] [IMAGE]Y9003 full height PS2 board   [IMAGE]SFF PS2 Adapter  
Hi, I'm running an Optiplex 390, i5 2400, 8 gig ram, gtx 970, and an evga 500w psu. Recently my pc has been chugging pretty hard (more than normal) and i wanted to check the bios to see if there's anything really in there i can fiddle with to get some extra boost. I enter the bios (bios A14) and i cant use my mouse but i can use my keyboard. Up, down, and enter work, but nothing to let me select a category, since I'd need a mouse for that. I've read up on it and I've seen posts about using a PS/2 mouse and keyboard, but my model doesnt have a PS/2 port. Am i stuck without being able to touch my bios at all? All help is appreciated 
Can't edit bios