My computer has made 3 graphics card have lines over the screen

[Ukgamer]

so about 2 weeks ago i got a ati radeon hd 4870 x2 off a friend put it in my computer lines come on screen so i reset but it nothing didnt show on the screen so i put my 8800gtx it was okay for a while but i was playing ava then my pc crashed could not move the mouse or anything i reset when it came back on my screen had all lines over it so then i put my old 8800gt and it did the same thing just after a day and today i got a 8500gt and that did the same as soon as i installed it. i have tryed the 8800gt in my brothers computer and it has lines all over the screen the same as in my computer so i think it has broken all the cards.


can anyone tell me whats wrong with my computer ?

 

[Sunius]

Are you sure it's not a broken cable or broken monitor?

If you are sure it's not either, then it might be your power supply unit.

 

[Ukgamer]

no its not the monitor on bored graphics works i am using it now

 

[Sunius]

So what's your power supply unit?

 

[Ukgamer]

580w

 

[Sunius]

Brand, model?

 

[Ukgamer]

Brand, model?

g7 power extreme

 

[Sunius]

That's your culprit...

May I ask how you managed to connect 4870x2/8800GTX/8800GT to it? That thing isn't mean to be used with electricity.. It may blow up at any second, especially after the stress you've gave to it.

 

[Ukgamer]

That's your culprit...

May I ask how you managed to connect 4870x2/8800GTX/8800GT to it? That thing isn't mean to be used with electricity.. It may blow up at any second, especially after the stress you've gave to it.

what that's the name on the psu

 

[Ukgamer]

google it it comes up as a psu

 

[tivatar]

Another wonderful Chinese knock-off PSU sold to the masses for profits.

It says 580W, but what they really mean is something like 240W. 12V rails is really more like 10-15V rails. There's a chance it damaged everything that touched it.

 

[Ukgamer]

how do u know this

 

[Sunius]

First of all, you claimed you had 4870x2/8800GTX/8800GT attached to it. According to its specs, it's too weak to power either of them.

Secondly, such cheap power supplies tend to have such quality, read this article:
http://www.tomshardware.com/reviews/low-cost-psu-pc-power-supply,2862.html

 

[Ukgamer]

where are u getting Sutai from

 

[Sunius]

Jesus, that's what they tested. It's very similar grade to your power supply unit.

Anyway, let's not have that discussion.

Could you answer this question: how did you connect 4870x2/8800GTX/8800GT to it??

 

[Ukgamer]

oh right i have been using this psu for about a year now and had no idea with a 6-pin pci-express power cable and the 4870x2 with a 6-pin and a 8pin power cable that i got from maplin

 

[COLGeek]

Time for a new PSU. Period. What is your budget to replace the one you have?

 

[Ukgamer]

Time for a new PSU. Period. What is your budget to replace the one you have?

that's the thing got no money left after i wasted it all on them cards and i play wow gonna waste my days

 

[Ukgamer]

and how do i know its the psu say i buy a new one and a graphics card it dont do the same thing cud it be the mobo ?

 

[COLGeek]

Your symptoms are classic signs of a defective PSU. 1000s of threads on Tom's to corroborate the diagnosis given by others.

Your call. Good luck!

 

[Sunius]

oh right i have been using this psu for about a year now and had no idea with a 6-pin pci-express power cable and the 4870x2 with a 6-pin and a 8pin power cable that i got from maplin

So you bought adapters and plugged them into your power supply unit? You have probably damaged the cards by doing that with such power supply unit :/.

 

[Ukgamer]

So you bought adapters and plugged them into your power supply unit? You have probably damaged the cards by doing that with such power supply unit :/.

yeah the cards are still the same when i plug them in to another computer so i am gonna have to buy a new card and a psu

 

[Ukgamer]

Your symptoms are classic signs of a defective PSU. 1000s of threads on Tom's to corroborate the diagnosis given by others.

Your call. Good luck!

okay thanks for the help