MSI nf750 g55 - no video

Just building a new rig:

Rosewill Xtreme Series RX850-D-B 850W

AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor Model

OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel

COOLER MASTER HAF 922 RC-922M-KKN1-GP Black Steel + Plastic and Mesh Bezel ATX Mid Tower

MSI NF750-G55 AM3 NVIDIA nForce 750a SLI HDMI ATX AMD Motherboard

2 BFG Tech BFGEGTX260MC896OCDE GeForce GTX 260 896MB 448-bit GDDR3 PCI Express 2.0 x16

Got it posting fine, loading into Windows 7 fine, all drivers installed etc etc.

with the onboard video

The moment I plug a card into the PCIe slot, it gives me no video. It appears to boot ok, the keyboard lights up and drives act like it's booting and then waiting for me to log in, but nothing. I have the latest Forceware drivers on the system, so it shouldn't be a weird driver issue.

The onboard video will not work either if there's another card plugged in.

I have tried forcing the video to default to onboard, no changes. VGA is disabled by default.

I've tried both my old video card and a new one.

Side note, even with this power supply, when I boot the PC there's a noticble drain on fans and lights in the case. I've seen other builds almost exactly like mine running 850w, I really didn't think power would be an option?
5 answers Last reply
More about nf750 video
  1. Did you plug in the power cables to you GPU?
  2. Yep

    With these new cards, there are 2 6 pin on each card

    My power supply has 2 sets of 6pin, 12v1/12v1 and 12v2/12v2

    I tried both ways, the 1s on one card 2s on other, and one of each. Didn't seem to matter either way

    On the old card, only 1 6pin on there, so that was easy

    all of the cards have full fan spin up as well.
  3. Found the problem

    Have to have a monitor plugged into the card to trigger the PCIe slot to come on, apparently
  4. For the record, what I was doing was switching the cable from the onboard to the PCIe card as it booted, not before

    I wasn't booting it up without anything plugged in anywhere and wondering why I didn't have video ;-)
  5. Very nice. Sometimes that's all it is; a simple oversight. Glad to see you've got it fixed.
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