Strange problem: IPTMTB-TK HP motherboard won't recognize GPUs with power plug

WithAlligators

Junior Member
May 2, 2015
16
0
66
Hey guys,
Chime in if you have any ideas. An HP "Elite" pavilion e9290f with the IPTMTB-TK motherboard. i7 920, 9GB Ram, 460W PSU, GTX 260. So, when I got this, it wouldn't post, only gave 2 short beeps and then 1 long one. Tried a new GPU, got same result. Tried resetting the RAM, got same result. Tried with no RAM, got much quicker beep code, went back to the original beep code when I replaced RAM. I noticed in the top x16 slot there was a modem card, and when I touched it it was a gajillion degrees. I unplugged it to find the main chip was popcorned off.
Then, for kicks, I tried a new PSU. Eventually, with the new PSU, I got it to post with a crappy 3450, but in BIOS, I saw it was only seeing 3 of the 6 sticks of RAM. Some rubbing alchohol and reseatting eventually got me all 9GB back.
But, here's the weird thing: I can't get it to not throw a beep code with any GPU that has power plugs. It shipped with the GTX 260 that was in it, which it won't post with. I also tried an HD 7870 and a second GTX 260, no joy. But, it will post with a GT 7300 and that HD 3450. The fans also don't spin up on the large GPUs. They did at some point earlier in testing, but not anymore.

Any ideas, before I pull out all my hair? Even simple stuff I may have not tried would be appreciated.

Cheers
 

MrTeal

Diamond Member
Dec 7, 2003
3,916
2,699
136
I assume you're plugging in the 6pin power cable to the GPU, correct?

Are you mounting the GPU in the same top x16 slot that the modem occupied?
 

WithAlligators

Junior Member
May 2, 2015
16
0
66
Yep, 6 pin is plugged in. GPU is tested and working fine in another setup. I've tried the thing in both slots to no avail. I'm starting to thing some of the lanes may be shot. The top slot won't work with any GPU.

Edit- Ohh, just realized, since this is an HP setup, the mATX board is mounted upside down. So when I say the top slot, I mean the farthest slot from the CPU. the bottom slot is the closest. Though, they are both labelled x16.

Cheers