HELP PLEASE

[Whybenor]

Hi LTT community! I have been working on a “Frankenstein” P.C recently and I need some help with it. How this started was I revived a dell optiplex 9020 with an Intel core i5 v pro and ripped it apart to take the CPU and mother board to put it in my current P.C, so I took the mother board and cpu and put it in my P.C case with a Msi GTX 960 I believe. Now the thing with doing that is I had to swap the power button but the mother board didn’t have the standard connections so I jumped the 20-24 pin and powered on the PSU. It seemed like I had won but there was a loud pop and it started to smell bad but I’m pretty sure I just over volted the stock fan. Now here’s the thing, everything in the P.C is receiving power but the gpu won’t boot nor will it give out a display, same with the cpu, it is reviving power but won’t give a display with the integrated graphics. One of the problems I suspect it to be is I have a molex to a 2x2 pin connected (a square one) because the 4x2 with the 2x2 connected won’t reach so plugged the 2x2 connection on the mother board with a molex. I have taken the CMOS battery out and even swapped it but it won’t give a display. 
 

 

Basicly:

1)system has power

2)cpu and gpu won’t boot

3)I have tried everything and loosing my mind.
 

 

[Foure]

It sounds like you may have fried your motherboard when you jumped the 20-24 pin connector. This can happen if you apply too much voltage to the motherboard, which is what it sounds like you did when you heard a loud pop and it started to smell bad.

The molex to 2x2 pin connector is also a potential problem. This connector is not designed to carry as much power as the 4x2 pin connector, so it's possible that you've overloaded the motherboard and caused it to fail.

To troubleshoot this issue, I would recommend trying the following:

1. Disconnect the molex to 2x2 pin connector and see if the motherboard will boot with the 4x2 pin connector connected.
2. If the motherboard still doesn't boot, try reseating the CPU and RAM.
3. If the motherboard still doesn't boot, you may need to replace the motherboard.

[tkitch]

what is the cpu

what is the motherboard

[Echothedolpin]

If I recall the 9020 uses a non-standard motherboard power connector. How did you plug your PSU into the motherboard? (If my understanding is correct)

[SMGSterlin]

I'm not certain of the issue, but I will say that I've never personally had a fan go "pop" on me before. In my experience when they die from an over voltage event, they tend to go more quietly and just die. I'm thinking the pop you heard may have been a cap on the motherboard. I find it unlikely it would have killed the CPU and GPU at the same time, if you're getting no display from GPU or integrated graphics but still power, I would start suspecting the motherboard.

 

I'm sure you thought of this but I'll say it just for good measure. When you installed that motherboard, you made sure there wasn't any standoffs or anything metal touching components on the backside of the board, right? I know Optiplex boards are a weird size and shape, possible a part of the case touched something it normally wouldn't.

 

EDIT: Echo makes a good point, I perform warranty work on Optiplex systems for Dell and the only PSU connectors I know of it using are a 4 pin CPU and the main board power is usually an 8 pin. Dell doesn't really believe in 20/24 pin connectors.

[Whatisthis]

Dell (and other OEMs) uses a proprietary mobo connector…so unless you made absolutely certain your pin-out matched the original psu, you now have a dead motherboard and possibly dead other components. Judging by the pop, that is the case.

[Whybenor]

24 minutes ago, SMGSterlin said:

I'm not certain of the issue, but I will say that I've never personally had a fan go "pop" on me before. In my experience when they die from an over voltage event, they tend to go more quietly and just die. I'm thinking the pop you heard may have been a cap on the motherboard. I find it unlikely it would have killed the CPU and GPU at the same time, if you're getting no display from GPU or integrated graphics but still power, I would start suspecting the motherboard.

 

I'm sure you thought of this but I'll say it just for good measure. When you installed that motherboard, you made sure there wasn't any standoffs or anything metal touching components on the backside of the board, right? I know Optiplex boards are a weird size and shape, possible a part of the case touched something it normally wouldn't.

I didn’t look at too hard and I probably should have, and yes the mother board is an odd shape but I don’t think anything shorted on my case but it might be an issue. 

[Whybenor]

42 minutes ago, SMGSterlin said:

I'm not certain of the issue, but I will say that I've never personally had a fan go "pop" on me before. In my experience when they die from an over voltage event, they tend to go more quietly and just die. I'm thinking the pop you heard may have been a cap on the motherboard. I find it unlikely it would have killed the CPU and GPU at the same time, if you're getting no display from GPU or integrated graphics but still power, I would start suspecting the motherboard.

 

I'm sure you thought of this but I'll say it just for good measure. When you installed that motherboard, you made sure there wasn't any standoffs or anything metal touching components on the backside of the board, right? I know Optiplex boards are a weird size and shape, possible a part of the case touched something it normally wouldn't.

 

EDIT: Echo makes a good point, I perform warranty work on Optiplex systems for Dell and the only PSU connectors I know of it using are a 4 pin CPU and the main board power is usually an 8 pin. Dell doesn't really believe in 20/24 pin connectors.

Yes, I was trying to just use the 4 and 8 pin but I think you guys are right how I was using the wrong power supply. And yes there is no 20/24 pin connector on the motherboard which is why I had to jump the 20/24 connector so I could access power my PSU

[Whybenor]

46 minutes ago, tkitch said:

what is the cpu

what is the motherboard

CPU: intel core i5 4670

mother board: dell E93839 AM0327

[SMGSterlin]

Got it, sounds like you used an 8 pin PCIE in the 8 pin spot on the Dell board. It's really dumb if it was keyed the same and fit, but that's Dell, so I don't doubt it. 

 

The 8 pin PCIE from a normal PSU only carries 12 volt power, I'm not sure of the pin out on the Dell motherboard connector but since it is the main system board it more than likely has 3.3v and 5v as a part of it in addition to 12v. I would guess you sent 12v to a 5v or 3.3v pin and fried the circuit. I'm almost certain it's not only 12 volt on the Dell board because the SATA power connector comes from the motherboard, and SATA uses all 3 voltages.

[tkitch]

28 minutes ago, Whybenor said:

Yes, I was trying to just use the 4 and 8 pin but I think you guys are right how I was using the wrong power supply. And yes there is no 20/24 pin connector on the motherboard which is why I had to jump the 20/24 connector so I could access power my PSU

you most likely fried everything.

 

Dell motherboards don't use ATX standards, they use a proprietary cable.

 

you can't just swap it.  I'd be surprised if anything works still.

 

Edit:  The GPU is the most likely thing to have survived.  I wouldn't hold my breath on the rest of the PC.

[Whybenor]

1 minute ago, tkitch said:

you most likely fried everything.

 

Dell motherboards don't use ATX standards, they use a proprietary cable.

 

you can't just swap it.  I'd be surprised if anything works still.

 

Edit:  The GPU is the most likely thing to have survived.  I wouldn't hold my breath on the rest of the PC.

Perfect, thanks so much for the help! This P.C was my first attempt at P.C building and it’s ok if nothing on the motherboard or cpu works because honestly I received this P.C for free because the company didn’t want it so it was my big learning experience. I was just hoping to turn this one into a server, but that’s ok.

[SMGSterlin]

Yeah, PC building can be tricky. A good rule of thumb, just because it fits doesn't mean it's compatible or the same. RGB, PSU power, M.2, SATA, they all have examples where something may fit, but it's not the same. Best case is that it just runs slower than it should, worst case is that it sets on fire or lets the magic smoke out.

 

Gotta understand the connector and protocol and make sure they're both the same.