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Should I buy a new PSU?

post #1 of 63
Thread Starter 
Guys, I have a new GPU arriving sometime soon.

(5870 2gb E6)

I was wondering if I "need" to get a new PSU.

IDK if my PSU's really gone bad or anything but it has the ff problem (or IDK if it's my current 4870's the problem)

When I use the native x2 6 pin pci connectors for my video card, it doesn't work and there are red lights on my video card.. The computer wouldn't boot as well.. at times it would just ramp up the fan to 100% (the GPU that is) (I think,, but it's really loud)

I managed to fix it by using x4 4 pin molex and converting them to x2 6 pin pci connectors for my video card.

Voilla! it worked! But with that decision, I sacrificed 2 fans in my case

I wonder how this all happened.

All I did before having these issues was that:

I removed the 4870 from my system

used an old GeForce 6200 PCI-E to (to test if it's broken since I was diagnosing an old PC [prolly 5 years old at least]

Found that Nvidia GF 6200 worked nicely (and found out it wasn't the problem with the old PC).

UPDATE (very stupid for me to fail to mention):
Tried my 4870 on the old PC I was diagnosing with a no brand PSU that IIRC, rated 300-350 watts..

The old pc with my 4870 booted up fine and when I was tinkering with the windows and some files for 5 mins.. just crashed (black screen, no power)


Put back the 4870 to my main rig (sig)..

BAM.. doesn't work with the native PCI connectors.

(so for more than 6 months now, my GPU has been getting it's power from molex to PCI connectors and not native PCI connectors from the PSU. So far so good [I don't OC anyway])

I am just really concerned if any of these are signs that my new upcoming GPU might get damaged.

Please help a noob

Edited by tubers - 2/25/11 at 11:51pm
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post #2 of 63
i wouldnt think that anything went wrong with your PSU...

sounds like something else happened. just double check everything

if the issue persists with the new card, then you might want to do some more troubleshooting work
    
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post #3 of 63
Thread Starter 
Quote:
Originally Posted by IntelConvert View Post
i wouldnt think that anything went wrong with your PSU...

sounds like something else happened. just double check everything

if the issue persists with the new card, then you might want to do some more troubleshooting work
+rep for a response..

Hmm..

So, do you think it's safe for me to use my PCI connectors for the new card I am soon to get?

I am afraid that they might have been the culprit that gave my card issues.

It's just so weird what happened (to my 4870). It doesn't work with native PCI but it works with converters
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post #4 of 63
Just to be on the safer side, get a better PSU. You don't want to ruin your brand new card do you? Newer Antec TPs are going cheap on the egg.
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post #5 of 63
Thread Starter 
Quote:
Originally Posted by adizz View Post
Just to be on the safer side, get a better PSU. You don't want to ruin your brand new card do you? Newer Antec TPs are going cheap on the egg.
+ rep for a response

Well it's still at least 86 bucks for me and I was wondering if I can get more opinions about my situation.

I really don't want to spend more and wondering if I am just becoming too paranoid.

(I wish it's just my 4870 that's "broken" and hating the PCI connectors but that doesn't makes sense to me xD)
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post #6 of 63
Quote:
Originally Posted by tubers View Post
+ rep for a response

Well it's still at least 86 bucks for me and I was wondering if I can get more opinions about my situation.

I really don't want to spend more and wondering if I am just becoming too paranoid.

(I wish it's just my 4870 that's "broken" and hating the PCI connectors but that doesn't makes sense to me xD)
The only way to test the PSU is to try it out with another card. If it works, the 4870 is broken. But I think its just the PSU.
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post #7 of 63
Your PSU should be fine, if its still under warranty I'd send it back though, it seems there is something wrong with one fo the PCIe connectors (it is most likely you won't be able to fix it). If your out of warranty you'll be able to get by with the molex converters, a new PSU and using actual PCIe connectors would be preferable.

Out of curiosity, have you tried only one molex converter (which you know works) and trying each PCIe seperately? If one works that'd allow you to switch one molex back to a normal PCIe power (assuming one actually works).
post #8 of 63
I would test the pci power out of the psu. That psu has 3 +12v rails at 19amps each. I"m wondering if you could have damaged the pci rail and not ruined the whole psu? I'm not a psu expert, but I would test or have the psu tested before spending the money for a new one.
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post #9 of 63
Quote:
Originally Posted by adizz View Post
Just to be on the safer side, get a better PSU. You don't want to ruin your brand new card do you? Newer Antec TPs are going cheap on the egg.
he has an Antec truepowertrio

thats a fine PSU.....
    
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post #10 of 63
Thread Starter 
Quote:
Originally Posted by adizz View Post
The only way to test the PSU is to try it out with another card. If it works, the 4870 is broken. But I think its just the PSU.
+rep for the response.

Hmm do you think it's about ~85% safe to try the my new 5870 when it arrives and the worst case scenario is that it would just not start or just crash due to PSU problem (most likely not enough power)..

but ultimately, unlikely to permanently damage the new card?


Quote:
Originally Posted by jackeyjoe View Post
Your PSU should be fine, if its still under warranty I'd send it back though, it seems there is something wrong with one fo the PCIe connectors (it is most likely you won't be able to fix it). If your out of warranty you'll be able to get by with the molex converters, a new PSU and using actual PCIe connectors would be preferable.

Out of curiosity, have you tried only one molex converter (which you know works) and trying each PCIe seperately? If one works that'd allow you to switch one molex back to a normal PCIe power (assuming one actually works).
+rep for the response.

I believe I have failed to register this PSU more than 2 years ago

Yes, I have been using 2 pcs of 2x 4pin molex to 6pin PCI converters to power my 4870.

IIRC, neither the native PCI connectors worked.

I tried the x1 PCI connector and x1 molex converter, switched connectors.. nada

Quote:
Originally Posted by Socko1965 View Post
I would test the pci power out of the psu. That psu has 3 +12v rails at 19amps each. I"m wondering if you could have damaged the pci rail and not ruined the whole psu? I'm not a psu expert, but I would test or have the psu tested before spending the money for a new one.
IDK how to do these nor I think we are likely to have tools to do so.. unless there's a program for it?

Quote:
Originally Posted by IntelConvert View Post
he has an Antec truepowertrio

thats a fine PSU.....
LOL I really hope that's the case in my situation..

BTW UPDATE! Forgot to tell you guys: (you can check my 1st post too xD)

Tried my 4870 on the old PC I was diagnosing with a no brand PSU that IIRC, rated 300-350 watts..

The old pc with my 4870 booted up fine and when I was tinkering with the windows and some files for about 5 mins then.. just crashed (black screen, no power)
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Intel System
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