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12-03-2011 02:55 PM
I wish to upgrade the psu 320 watt which is fitted to my desktop HP Pro 6200 micro tower to a psu 500watt+ is this possible as I wish to install a separate graphics card
01-31-2012 06:55 AM
Hi, you can use a ATX-PSU if you do some rewiring:
1: The 4-pin cpu contact is ok as it is.
2: Clip the 12v, -12v and GND from the 24pin ATX and wire it to the 6-pin MB contact (color coded)
3: Take the "Pwr good" from the ATX- contact and put it on the small 6 pin HP special contact (grey I think) (clip the others on this special contact)
4: Use a external switch to ground the green "Ps_ON" from the PSU ATX contact.
5: Set in bios that it will start automatically after power loss.
Now you can start the computer via the new external switch.
You will have to press F1 during startup because it complains about the PSU fan is not detected.
(The pro & elite series is steering the PSU fan from the Motherboard)
I used a z400 475W PSU... it fits perfect in the case