Help with Older HP motherboard and newish GPU?

[starseedgrowers]

Ok this is my first post. Usually I lurk until I find my answers but I got stumped on this one probably due to my lack of knowledge on basic electronics and the way power is distributed in a computer system.

I'm a newer builder so go easy on me. My past with computers is mostly a user but I had some cash over holidays and bought everything for a new build which went great! Now I'm using debian stretch and learning Linux and python on my new kaby lake i3 PC.

Problem is I got hooked on building.

I've been finding older PCs for parts and making gaming rigs out of them for family members/friends/landscape clients to purchase.
Heres what got me:

I found an HP p6000 series at thrift store for $20 so naturally I went and got a newer case, PSU and GPU to get it aesthetically appealing and running relatively new games. (Selling to a young gamer)

I ran into issues with getting a display with the card.

Here's the components:
Logysis case. came with 480w PSU
I had a spare Antec basic power 450w
Intel core i3 540 @3.07GHz
Mobo: HP - MS-7613 vers. 1
I put 8 GB of new DDR3 modules
WD 500GB HDD
And I have been testing 2 GPUs:
Galaxy Nvidia gtx 550ti (uses 6pin power)
& the newer MSI GT 1030Lp

Originally I had the components listed above with the GT 1030 and the PSU that came with the Logysis case (480w)

First made sure all worked and posted with onboard graphics output and got into BIOS to check things like CPU temp/voltage and memory. Booted from win7 disc and installed fine.

Then I used the GT 1030. It was same. Posted booted into win7 and started updating . upon restart.. No display. So I wondered if it was O.S. driver problem and reinstalled. Without updates it was same, no display. So I wondered if the PSU was faulty and took out the logysis 480w PSU and put in the new ANTEC 450w.

Upon boot display showed display fine with the 1030.

Then after shutting down(no driver install or updates) and turning back on next day, no display. So I started wondering if PCIE slot is bad and decided to remove all power from mobo and use compressed air to clean the connections.

When. I plugged it all back in it showed the display fine. But again after restart or power on/off the next boot had no display. So I thought maybe its the GPU. The thing is that I put the GT 1030 GPU on an LGA 775 board with a Core2 quad 6600 and it has no problems at all.

I wondered if there is a problem with the compatibility of the newer GPU and the MOBo. Or maybe the CPU is incompatible the the video card??

So next step was to take an older GPU (the GTX 550ti) and try that with the 450w PSU still in there. Keep in mind this card requires 6pin power which the PSU that came with case doesn't have - and the GT1030 runs off mobo.

It has been running fine with multiple restarts/power on off and all output works fine.

Question is why cant I use the GT1030? And why did it work if I remove the 4pin power to mobo and then put it back in? I tested this several times and it would not show any display unless it was right after I removed the power to mobo then put it back. (It only displayed on 1st boot after doing this several times)

I'm sorry if this is hard to follow. I'm very confused too.

Its not any cable or monitor issues I have multiple monitors and bins of connectors and cables and tried everything.

I wanted to use the 1030 for this build because I want to sell to to a friend and I want to keep my 550ti. I like that GPU. It has dvi,vga and HDMI and games I like to play run well with it

Is it possible that the mobo isnt getting enough power to that slot and that's why the 550ti works (because it has power through the 6pin)?

Please help. It took 16 hours of my life to cave to the point of posting here, which I have to say, has the most helpful individuals on the internet.

Please keep in mind, I'm a landscaper and gardener. I'm new to this but learning fast because I was raised on computers. My Dad works at SLAC / Stanford lab and ive finally realized this is in my blood and want to put the puzzle together.

I literally started really learning about electricity, electronics and computer hardware last year in NOV. Up until now all I've done is use computers for work, school and games

Thanks for your time, considerations and wisdom.

 

[James Mason]

10 series cards don't like motherboards that lack UEFI Bios, (the fancy ones that don't look like DOS) and an old motherboard like that definitely doesn't have one.
The reason it worked the first time is because the system didn't have any Nvidia drivers, so the GPU was being treated as a basic display adapter.

Also that's a really terrible CPU for any modern games.

Though, it may be possible it's some weird motherboard power issue, i think whatever you're doing with the power connector to the motherboard just resets it briefly, and then when it tries to read the modern GPU and can't, it uhh fails.