Changed PSU & got display issue

[Saif S]

Hello,

A week ago, I replaced my rig's PSU with new one as the previous one blown out, the new one is ThermalTake TR2 430W, while the old one was Huntkey 600W.
Installed it, and noticed that at higher CPU usage the display starts to shake or flicker, as if there's lack of current.
Tried to do a trick, changed the LCD monitor refresh rate from 60hz to 75hz and somehow that visual effect reduced much. But I'm afraid the higher refresh rate will effect badly on my monitor.

So is it the PSU issue? I heard a suggestion from another forum: if the PSU wattage is low it can power up the PC or never able to boot at all.

The system is:
GA-Z87X,D3H
i7 4770k OC to 4.3 Ghz
Ram: 1333, 16GB (2*8gb)
HDD: Seagate 2TB @7200 rpm 64mb cache
Video card: PNY - nVidia Geforce GT 640 (no dedicated power plug)
PSU: ThermalTake TR2 430W


Looking forward to hear from you guys. Thanks a lot & have a great day.
Sincerely
Saif

 

[Wicked Mystic]

That crap Huntkey PSU may well have damaged something. Now you put better PSU, that damage becomes visible.

As for refresh rate, is your monitor supports 75 Hz (it probably will), there is no problem.

Also, you did connect your monitor cable to Geforce, not motherboard, right?

 

[Saif S]

Thank You mate for this reply...

That crap Huntkey PSU may well have damaged something. Now you put better PSU, that damage becomes visible.

OMG! I was afraid of that!! What could happen? Please not the CPU!

As for refresh rate, is your monitor supports 75 Hz (it probably will), there is no problem.

Well it is Dell EH2414H which by default only support 60hz refresh rate

Also, you did connect your monitor cable to Geforce, not motherboard, right?

Yes sure I did.

 

[Wicked Mystic]

OMG! I was afraid of that!! What could happen? Please not the CPU!

Anything can happen. Those crap PSU's can break everything, especially when they break down. It's like excitement for life using those.

Well it is Dell EH2414H which by default only support 60hz refresh rate

Many monitors support higher refresh rates, but they are officially limited into something.

Yes sure I did.

So does same happen when rig is not overclocked?

 

[Saif S]

Anything can happen. Those crap PSU's can break everything, especially when they break down. It's like excitement for life using those.

I already wanted to replace the MG & memory chips

Many monitors support higher refresh rates, but they are officially limited into something.

Yeah so I will just increase it again

So does same happen when rig is not overclocked?

It was worse!

 

[Wicked Mystic]

I already wanted to replace the MG & memory chips

Usually bad PSU's damage motherboard first, so processor may be intact.

Yeah so I will just increase it again

There is some risk but then that's good way to sell "cheaper" monitors (just limit refresh rate a little on "cheaper" model).

It was worse!

And this all happened after PSU exploded? Then PSU explosion may have something to do with it.

I would first try with different video card also. That issue (CPU usage goes up and problem starts) sounds very bad and mosty probably that won't help. It's also possible that new PSU is faulty. Some parts are just DOA. 430W for that rig is more than enough though.

 

[Saif S]

Thanks mate for sorting things up for me, I appreciate it :)

 

[Wicked Mystic]

Thanks mate for sorting things up for me, I appreciate it :)

Hope you get your problem solved.