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post #41 of 63
Sometimes electronics just do weird things.

I worked on this system once, with an old S478 Foxconn mobo and an Antec TPII 550W, for one of my cousin's friends. It was just having some minor issues which later turned out to be some bad HDD sectors. But I thought maybe it was the PSU, since the TPII units tended to fail a lot due to crappy Fuhjyyu capacitors.

Well, when I plugged an Antec Earthwatts into the system it failed to POST. Plugged the TruePower back in and it started up fine. I plugged the TruePower into a S775 board and aforementioned crappy capacitors started squealing like pigs on holiday. Plugged it back into the 478 system, worked fine with no noise. Plugged a spare Delta PSU from a Dell into the 478, failed to POST.

It's like the PSU and motherboard were mated, and using either part without the other resulted in major issues. I still don't know what's up with that, but after it turned out the HDD was bad the guy decided to buy an HP something and gave the old system to an electronics recycler.
post #42 of 63
The fact that the vid card works with the adapters but not the actual PCI-E cables is the main reason why it's more likely the PSU. The Video Card doesn't care where the power comes from as long as it gets 12v and ground from the correct pins. It doesn't give a rat's patooty if it's directly from a PCI-E cable or an adapter connected to Molex cables.
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post #43 of 63
Thread Starter 
Quote:
Originally Posted by Phaedrus2129;12552159 
Sometimes electronics just do weird things.

I worked on this system once, with an old S478 Foxconn mobo and an Antec TPII 550W, for one of my cousin's friends. It was just having some minor issues which later turned out to be some bad HDD sectors. But I thought maybe it was the PSU, since the TPII units tended to fail a lot due to crappy Fuhjyyu capacitors.

Well, when I plugged an Antec Earthwatts into the system it failed to POST. Plugged the TruePower back in and it started up fine. I plugged the TruePower into a S775 board and aforementioned crappy capacitors started squealing like pigs on holiday. Plugged it back into the 478 system, worked fine with no noise. Plugged a spare Delta PSU from a Dell into the 478, failed to POST.

It's like the PSU and motherboard were mated, and using either part without the other resulted in major issues. I still don't know what's up with that, but after it turned out the HDD was bad the guy decided to buy an HP something and gave the old system to an electronics recycler.

OMGosh! I guess that's one way to describe my issue..

The 4870's mated and married to the molex converters LMAO!

+rep

So.. you think.. with all my stated problems: You think it's likely/somewhat safe to try the the native PCI connectors from my PSU to the new 5870 before jumping any guns?
Quote:
Originally Posted by PapaSmurf;12552174 
The fact that the vid card works with the adapters but not the actual PCI-E cables is the main reason why it's more likely the PSU. The Video Card doesn't care where the power comes from as long as it gets 12v and ground from the correct pins. It doesn't give a rat's patooty if it's directly from a PCI-E cable or an adapter connected to Molex cables.

IMO, that makes a lot more sense.. but it's really weird.

+ rep btw

anyway:

I also ask you:

So.. you think.. with all my stated problems: You think it's likely/somewhat safe to try the the native PCI connectors from my PSU to the new 5870 before jumping any guns?
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post #44 of 63
Not until you have that PSU checked out. Get a DMM and check to see if you are getting 12v out of each of the yellow wires and that all of the blacks are properly working as a ground.
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post #45 of 63
Thread Starter 
Quote:
Originally Posted by PapaSmurf;12552885 
Not until you have that PSU checked out. Get a DMM and check to see if you are getting 12v out of each of the yellow wires and that all of the blacks are properly working as a ground.

+rep

Then how about I'll just use converters like how I am doing now with my 4870?

Or is it likely that my new card would become dependent on those converters once I use em frown.gif
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post #46 of 63
Quote:
Originally Posted by tubers;12552108 
Will check most likely tom smile.gif

+rep



+ rep!

Yeah! I was really thinking that too xD

But isn't that just plain WEIRD xD

Why would that 300 watt PSU (w/c I also used PCI converters with) "damage" the video card in a way that the video card would "hate" PCI connectors!

It's weird that it went one sided and now only "wants" converters! LMAO

It really doesn't make much sense xD

Wow! Thanks for sharing the "hidden" costs! I'd rather put that money to a new PSU! smile.gif

Well, I was thinking I'd get an 850 watter.. since I might get another 5870 2gb later down the line

(If I find it for 150 bucks or below! Bought the 5870 2gb E6 for 185 brand new from Newegg [thanks to OCN online deal posts]<3)

ehem..

regarding the GPU/PSU thingy.. doesn't make sense much right? xD

the whole thing doesnt rly make sense, lol. its hard to give a clear answer on things like this

and the service charge doesnt apply to all RMAs, so you will want to read up before you consider the RMA

and with 5870 crossfire and a high end CPU, 800w+ is over kill if you have a quality PSU.
Quote:
Originally Posted by tubers;12553065 
+rep

Then how about I'll just use converters like how I am doing now with my 4870?

Or is it likely that my new card would become dependent on those converters once I use em frown.gif

this is not a common thing, so dont think that cards or PSUs are picky on how they are connected and they will throw a temper tantrum if something is done that they dont like.

if the regular PCIe cables dont work with the new video card, then it must be the PSU


if they do work with the new card, then it was the old card...

really there isnt a clear answer since we cant sit down with you and inspect the parts ourselves.
    
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post #47 of 63
Thread Starter 
Quote:
Originally Posted by IntelConvert;12553814 
the whole thing doesnt rly make sense, lol. its hard to give a clear answer on things like this

and the service charge doesnt apply to all RMAs, so you will want to read up before you consider the RMA

and with 5870 crossfire and a high end CPU, 800w+ is over kill if you have a quality PSU.



this is not a common thing, so dont think that cards or PSUs are picky on how they are connected and they will throw a temper tantrum if something is done that they dont like.

if the regular PCIe cables dont work with the new video card, then it must be the PSU


if they do work with the new card, then it was the old card...

really there isnt a clear answer since we cant sit down with you and inspect the parts ourselves.

+rep

Sorry, I bet Im becoming too annoying xD

So, what would you think is "safer" if I were not to get a DMM and a new PSU..

Use my converters first? (w/c is working great with my 4870)

or use the PSU's native PCI connectors first?

(for the new 5870 biggrin.gif)
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post #48 of 63
If you plan on upgrading anyway, anything along the lines of a good 750w will do well for CF 5870s. If you simply can't figure out what the problem is, and can't find any reasonable way to solve it, you really can't do much else than see if the voltages on the cables are normal. I read this thread and still end up with a vague "maybe" for whether it's the PSU or not. tongue.gif
 
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post #49 of 63
Just test it!!!! Its super easy to do. Hell, you could even use a flashlight bulb and 2 paperclips! TEST IT! Then go from there.
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post #50 of 63
Thread Starter 
I decided to somewhat risk it:

the 5870 is currently running fine.. I used the Native 6+2 Pin PCI and another native 6 pin pci connector from my supposed "troubled" PSU.

WEIRD!

So far so good.

Will play a few games and hook up all my old fans (w/c 2 i removed because I had to convert Molexs)

It's pretty weird though that the other Native 8pin DOES NOT fit the 5870 8 pin pci slot.. while the 6+2 PCI connector did..

Wonder what that other 8 pin PCI is for xD

+rep to recent replies.
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