Replacing bad caps on motherboard

[Computerhulp Looman]

Hello,

i have an asrock x58 extreme motherboard. Problem is, when i benchmark graphics, it reboots randomly. Now i found some capacitors on the mainboard which look dirty and i want to try to replace them. They're close to the first x16 pci express slot.
Question is, whether i just can take a capacitor with same uF, high temperature withstand and replace them? Or, does the ripple current also apply and do i have to take notice of that.

Added a photo of the capacitors.

Grtz

 

[Computerhulp Looman]

You can definitely replace the caps; it won't be expensive and it may resolve the issues.

Hey Ghislain,

tried to replace the caps, but couldn't get the caps out of the mainboard. So i put the mainboard away, without cpu, cooler and memory. Now, after some days i took the mainboard back, took another psu, took my i7 920 cpu and 2 gb memory and put it together. The voltage says 12.2 volt, so now it's a good voltage.
The caps , it seemed only like 450 degrees celsius to melten the tin. Tried that but i couldn't manage that. And it's really tiny. My desolder iron was like 2mm, and the caps pins were like 0.7 mm. Been searching for a better desolder iron, but i guiess it takes like 150 euro for such.
Do you think, lying the mainboard in a fridge can solve issues with the 12 volt?

grtz

*edit: guess the radeon 5970 just lowers the 12 volt with 0.4 to 0.9 volts.

 

[GhislainG]

The fridge isn't a solution to motherboard issues unless it overheats and you keep it in there while using it (that would in turn create potential issues like high humidity, etc.)

My first reply on January 2 probably was correct; couldn't you use another GPU? It should be 6-7 years old by now.

 

[Computerhulp Looman]

The fridge isn't a solution to motherboard issues unless it overheats and you keep it in there while using it (that would in turn create potential issues like high humidity, etc.)

My first reply on January 2 probably was correct; couldn't you use another GPU? It should be 6-7 years old by now.

Hey Ghislain,

well i got a brand new mainboard. It completely doesn't support the radeon. Must be some incompatibility between the x58 chipset and the amd chipset. Put the old mainboard back together with an i7 cpu i had lying around, and voltage of 12 volt is like 11.8 volt, but sometimes it's 11.9 volts. On the xeon cpu, i had installed before, there was a little black mark on the cpu, between the pins. Yesterday, i ran, with an updated version of furmark, a benchmark and it ran well. Just the gpu temp was almost 100 degrees celsius. So i installed msi afterburner and activated the fan profile. I don't completely trust the complete pc, cause in the past one day it was running fine benchmarking the gpu, and the other day it completely wasn't. But since then, there has come out a cpu patch. So they found a bug in the cpu, which now is resolved. I hadn't installed that patch yesterday, it was still running fine gpu benchmarking it. There is a small chance, there are hackers around the world which dive into that bug and destabilize the pc. Since it's a very old system. You can install, or it will automatically install, when you run iobit care system cleaner. But i must say, the graphics 4k or not, of a displayport to hdmi 2.0 converter, is very nice. Might be an old gpu, but the colours are wonderfull.
So now i got the asrock x58 extreme, with a i7 920 cpu, running at 2.4ghz.
One thing, when finding errors on a mainboard like this, i shouldn't look too much at voltages. It can still run fine with a little lower voltage. The xeon/motherboard power input for the cpu, well it could be some 12 volt links. And if overclocked a lot, maybe the internal resistance it getting more and the 12 volt drops. One psu can handle that better than others.
So for yesterday, gpu and mobo were working right.

Nice day!

 

[GhislainG]

That's good news!

 

[Computerhulp Looman]

That's good news!

Hey Ghislain,

it worked, even overclocked cpu, for a week. This morning, after a night putting it off, it rebooted randomly again. But if i put the fsb clock to stocks, it worked again. Seems the radeon 5970 just doesn't like fsb overclocking. Could turn up the multipier though.
At best, when overclocked fsb, the machine goes into windows, (or safe mode), and reboots. So it's not a driver issue. Must be some issue with the fsb pulling the pci express clock up with it.

*edit: if i put the pci express clock to 90mhz and the fsb to 166mhz it does work.
*edit2: think if i take of the power connectors to the mainboard for a minute and reconnect it, it would work better again. Then when turned off at night i could try to turn off the psu at the backside instead of just turning the pc off. For now i have to test it with Furmark.

 

[GhislainG]

FSB overclocking works as long as the the PCIe bus is kept at 100 MHz. You sure like playing with that hardware more than I do.

 

[Computerhulp Looman]

FSB overclocking works as long as the the PCIe bus is kept at 100 MHz. You sure like playing with that hardware more than I do.

Hey Ghislain,

the pc is still working till date. 4k furmark benchmark reaches 22fps, so i can't game in 4k with it. Even overclocked the gpu from 725/1000 to 800/1100mhz.
Got a chinese 1366 mainboard, but it doesn't support the radeon 5970 gpu, it doesn't give any image. And can't overclock the cpu even a tiny bit with it. But a lot of settings in the bios i don't have a clue what they are for.
The cpu fan sinks in rpm when i do a benchmark, probably caused by the 12 volt that lowers to 11 volt.

Grtz

*edit: screen flashing probably resolved by upgrading the tv software/firmware.

 

[GhislainG]

At least you seem to appreciate playing with legacy components.

 

[vexicus]

Why not u get urself a new x58 mobo

 

[GhislainG]

Why not u get urself a new x58 mobo

You missed this in the OP's last post: "Got a chinese 1366 mainboard".