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So I got a new 550w 80plus Enermax PSU and a 1GB nVidia GTX 650 video card. I put it all in my HP Pavilion p6-2310 (hunk of junk) w/windows 8 x64 and closed it up. Two startups in a row I got a series of 6 long beeps. Other bootups I didn't get anything. Monitor still gets no signal, even when plugged in the old port(I've tried another monitor as well). All my disk drives are working, all the fans are running yet no luck.

I took the video card out and now I'm editing this article with this computer.

Any ideas as to where I've gone wrong?

*I have tried popping the CMOS out and back in again.
Thanks for any help!

Edited by thetechguy
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Building on comments from , , and , here are focused, practical checks that go beyond the thread and help isolate whether the card, PSU, slot, or firmware is at fault.

A repeated pattern of six long beeps is not universal — it can mean different things depending on the BIOS/OEM. On many HP systems and on AMI-style BIOSes the pattern points at low-level initialization (keyboard controller/A20 or video-init/motherboard problems), so treat the beep pattern as a clue to hardware/init failure rather than a proof the GPU is the culprit. (h30434.www3.hp.com)

Power and connectors are the usual suspects after a new card install. The GTX 650 is a low-TDP board (about 65 W) and normally doesn’t need a 600W+ PSU; a properly working 550 W Enermax should be enough in principle. What still causes failures is an incorrect/loose cable, a modular cable plugged into the wrong PSU port, or a damaged cable/adapter. Verify the card shows life (fan/LED), confirm the PCIe cable is a PCIe-labeled cable (not an EPS/CPU or Molex adapter) and fully latched, and avoid daisy-chaining or unofficial adapters. (techpowerup.com)

If connections look right, isolate the problem with a minimal-boot and swap tests: power down, move the board outside the case to rule out shorts, keep only CPU + cooler + one RAM stick + PSU and either the GPU or iGPU, then try booting. Try the card in a different machine and/or a known-good card in the Pavilion — that’s the quickest way to decide DOA vs system issue. If integrated/old GPU gives video, update the motherboard BIOS (using HP’s support for the exact product number) and retry. (blog.silverpc.hu)

If the card still prevents POST after all of the above, it’s likely defective or there’s a hardware fault on the board (slot/standoff/short). Test in another PC and RMA if it fails there; if it works elsewhere, focus on the Pavilion’s slot, standoffs, front-panel wiring, and BIOS. (blog.silverpc.hu)

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Member Avatar for rubberman

You may need to edit your BIOS/UEFI settings to disable the onboard chip and enable the external adapter, or to tell it to use both. My guess is that it is set to only use the onboard chip so it is objecting to the "unknown" hardware. Since it won't boot with the nVidia card inserted into the system, I think you will need to boot into the BIOS and disable the on-board chip first. Then, if it boots, you may be able to set it to use both video adapters.

One other thing is power. The GTX650 is pretty power-hungry, so it is possible that there is not enough juice to run everything with the nVidia onboard.

Member Avatar for Rik_

The GTX 650 probably has a 6 pin power connector on it. Did you fit the 6 pin plug into it?

Member Avatar for aawebdev

Actually you need 650 watt or 1000 watt smps for your gtx650 graphics card. And also you need to connect the power port correctly between power supply unit and graphics card.

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