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Faulty nVidia GTX 470, Issues. High Temperatures :(

post #1 of 69
Thread Starter 
Hey peeps...

Basically bought a faulty Point of View GTX 470 off ebay in the hope to repair it, which i did . Card would power up but not show a picture and the chip stayed freezing as in not getting power, so i assumed it was the usual and would need reflowing etc. Did that, no luck. Then as i was about to chuck the card i noticed a TINY component that was loose on the back of the board.. Tried for ages to get it to solder back on, then dropped it and lost it into the mass which is the carpet. I had bought a faulty GTX 275 too, which the b*****d lied about saying he hadnt touch it, when really he had tried resoldering the caps and just broken them all...

I managed to nab the same size/looking component off the bottom of it and after an hour or so finally, thank god, got it soldered in place. Here is a picture:



The piece is like one of the black ones next to it, however was a yellowy/greeny colour.

Now this booted into windows and instaled fine, plays all games fine etc. My problem is the tempratures Idle with mozilla open =



** Ignore the -128C temps || second GPU listed is the GTX 470**

Playing games it gets to 90C and is screaming but will never get higher, i know these cards run hot.. But really?!?!?! Ive reapplied thermal paste. Tried arctic silver 5, MX-2 and some akasa stuff all within 1C of each other.

What is the component that fell off that i have since replaced? I know the card didnt power on before it was there so could it be a lower resistance therefore letting a lot more power in to cook my baby?

Any help at all is appreciated!!!


*EDIT* Also using AIDA my graphics card keeps switching from its lower power mode to gaming frequencies?? i swear i heard someting about this somewhere?? *EDIT*
Edited by Br0k3nLiNk - 8/17/11 at 1:22am
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post #2 of 69
Thread Starter 
Anybody at least know what those components are? that way i can rule out it being that causing the issues!

(Sorry to bump, just need to sort this out )
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post #3 of 69
Looks like a small transistor, idk.. and those temps are pretty normal for reference Fermi. As for the 2d/3d clocks, it does that to save power during games (if the load isn't so big) and sometimes the software just reports it a bit slowly and incorrect.
    
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post #4 of 69
I'd say the load temps are about normal but idling at 71 is certainly high. Do you have just one monitor connected to the card? can you verify that it is actually downvolting/clocking itself on idle with a DMM?
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post #5 of 69
I will look on my 470s to see what kind of component it is (can't see it clearly from that picture). It looks like a resistor to me. How much soldering points did it have (amount of terminals).
post #6 of 69
Thread Starter 
@juano, i have only 1 monitor connected. If i plug my TV on the second port it cranks the frequencies up and temps then sit at 80C. I use AIDA and look at the card, when it steps up all the current values change etc.

@TheBlademaster01, it has two terminals.. In the picture there is a bigger version of it located just down and right labelled 'C524'. It like 6 or 7 times smaller than that!

Thanks
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post #7 of 69
Ok, well because it seems like you know you're way around a PCB if you have confirmed that it is downvolting using a hardware means (DMM) because the software could be mistaken, then I'm not exactly sure what it could be. Good luck troubleshooting it, I'm sure others here will be able to offer some suggestions still.
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post #8 of 69
thats a surface mount capacitor.
send it to me fella,i'l sort it
failing that get your grannies glasses or a magnifying glass because there should be some writing to ID the value on the black part of the cap,
or use a multimeter....
thats one messy soldering job though !
Most SMT components look very similar,so i doubt its critical as you said you robbed one off your other GPU..
TBH i doubt that is causing your temps issue,did you recycle the TIM?
Edited by MightyMission - 8/17/11 at 3:24am
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post #9 of 69
Quote:
Originally Posted by Br0k3nLiNk View Post
@juano, i have only 1 monitor connected. If i plug my TV on the second port it cranks the frequencies up and temps then sit at 80C. I use AIDA and look at the card, when it steps up all the current values change etc.

@TheBlademaster01, it has two terminals.. In the picture there is a bigger version of it located just down and right labelled 'C524'. It like 6 or 7 times smaller than that!

Thanks
Oh, okay. I've located the component on the PCB of my cards and it looks like a capacitor to me an SMD one that is (Surface Mount Device). I don't know exactly what the function of that particular capacitor is but there are only a few purposes for a capacitor in that situation. It could be used to filter certain currents (DC and AC) or frequencies or to store energy. I think this one would be used for filtering some current which would explain the heat while idle (90*C @ load is high but not unusual for a GF100 based chip, but 70*C at idle is high though). Also the size of the capacitor seems to small to store a significant amount of energy.

In any case those are just my thoughts, but it is important to make sure you use the right capacitor. It should have a certain colour or symbol code to indicate the electrical properties of the capacitor. Here's a link that explains how to read them. I don't have that much experience with soldering and building circuits so maybe you should shoot a PM at a volt modder around around here.

Also what voltage is supplied to the GPU when at idle (MSI Afterburner/Everest)?

EDIT:

I've been ninja'd

That's what you get for writing long posts . In any case MightyMission mght be skilled enough to help you out. I'm just an EE student, I can only analyse to a certain degree
Edited by TheBlademaster01 - 8/17/11 at 3:38am
post #10 of 69
Thread Starter 
@Juano i will try when im home later to see what its voltages are at and reply back.

@MightyMission, Ok well that helps me a bit, at least i know what it is now! The problem being the one from this card i lost in my carpet.. I then took one off a failed GTX 275 which was the same colour/size (lol) and soldered that on, messy i know but an hour doin that with ur standard soldering iron was not fun! Well the card wouldnt work at all without it, not it operates fine?? Also whats TIM ha
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