For once, I am posting a request for help!
I am no hardware idiot, but I am not the 1337 gamer/overclocker, so on occasion I have moments that baffle me. I just purchased a moderately-powerful video card for a machine I am trying to resuscitate. i giddily installed it yesterday (took usual precautions such as static wrist strap, static pad on my workbench, etc.) and fired up my machine after removing my old video card (which works like a charm, but is just a bit underwhelming in power.) No output whatsoever. The machine powers on, I don't hear any POST beeps whatsoever, and no display. Very disheartening.
My first thought was, "PresComm, you dummy! You probably didn't check the power draw for this card and you don't have a beefy enough PSU to handle it." Turns out, I only had a 300W PSU in the machine, and the specs call for at minimum 400W PSU. I had a 400W PSU lying around that was the right form factor, so I installed it and tried again. Same issue. I removed everything but the bare essentials (the mobo and CPU connectors) to ensure I wasn't overshooting the PSU's capacity, but the same issue occurred. I assume that the card isn't drawing a full 400W. That would be crazy, right? The old PSU called for 75W, so a jump of 375W seems ridiculous.
From what I have read, once a video card gets powerful enough, there will typically be separate power connectors on the card itself (like a 6+2 setup) so that the card can draw directly from the PSU instead of the mobo. The card I purchased does not have this, so I assume it can't be that power hungry.
The problem that I have is my mobo does not have onboard video, so I can't install the card and then connect to onboard video to check BIOS or anything. I am troubleshooting somewhat blind here.
My most recent step was to remove the CMOS battery last night. I am going to reinsert it when I get home and test again to see if that helps. If not, I am running out of ideas. I'd hate to go buy a beefy power supply without knowing if it will actually solve my problem.
Only random thought I have hanging in my head is a Molex connector directly above the PCI-E slots that is labelled "PCI-E". Not sure if this is needed to supply extra power, but connecting to it didn't help at all.
Any help would be appreciated.
EDIT: I should note that my research last night drove me to the discovery that this card is likely a rebrand of the AMD Radeon HD 5450 (http://www.amazon.com/XFX-Radeon-PCI-Express-Video-ON-XFX1-DLX2/dp/B008N1DU8W). Comments from denizens of the Interweb state that this card typically draws around 220W. Just wanted to put that out there.
Edited by PresComm, 02 July 2015 - 09:44 AM.