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Soldering an 8 pin to 4890? - Page 2

post #11 of 18
Quote:
Originally Posted by derickwm View Post
That can't be right... I have 2 6pins instead of two 8 pins plugged into my 6990, both using the 6 to 8 pin adapters. If it's giving half the power, it seems like my 6990 wouldn't even turn on.
Quote:
Originally Posted by donk165 View Post
Well from what I've been reading from here, the max wattage of 6 pins is 75w, and the max wattage of 8 pins is 150w. The extra 2 grounding wires allow the graphics card to draw more current.

I'm guessing using those adaptors is putting more strain on the PSU if your using the 6 pin lines with adaptors, hopefully the PSU is designed to handle the extra current on those 12v lines.
correct. the thing with wattage and amps is that you will only use the component needs to using a 8 pin means the card can pull 150w from that connector safely if needed. using a 6 pin will be fine if the cards doesnt need more 75w from that connector
post #12 of 18
Thread Starter 
Quote:
Originally Posted by Bitemarks and bloodstains View Post
correct. the thing with wattage and amps is that you will only use the component needs to using a 8 pin means the card can pull 150w from that connector safely if needed. using a 6 pin will be fine if the cards doesnt need more 75w from that connector
Thanks for the clarification, my knowledge about watts and current are not very solid. Its just based off me scan reading stuff on the net . So if derickwm's 6990 needs more than 75w per plug, it will pull more from the PSU because the card assumes its got 2 full 8 pins plugged into it.

And that could damage/reduce the life of his PSU because its pulling more current than it was designed to through those specific wires. Unless his PSU has the ability to deliver the extra current through those wires?
    
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post #13 of 18
Quote:
Originally Posted by donk165 View Post
Thanks for the clarification, my knowledge about watts and current are not very solid. Its just based off me scan reading stuff on the net . So if derickwm's 6990 needs more than 75w per plug, it will pull more from the PSU because the card assumes its got 2 full 8 pins plugged into it.

And that could damage/reduce the life of his PSU because its pulling more current than it was designed to through those specific wires. Unless his PSU has the ability to deliver the extra current through those wires?
Well His PSU will allow it to take more power, the wires will just warm up slightly more.

if they pull to much juice the wires would melt
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post #14 of 18
Thread Starter 
Quote:
Originally Posted by jjpctech View Post
Well His PSU will allow it to take more power, the wires will just warm up slightly more.

if they pull to much juice the wires would melt
Right, got it Thanks.

Kinda flew off topic a bit but oh well, now I understand about 8 and 6 pin power draw. And also I cant just solder an 8pin on, the different components probably cant handle the extra juice
    
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post #15 of 18
So I'll only be in trouble if I'm running my 6990 at 100% use for large amounts of times?
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post #16 of 18
Thread Starter 
Quote:
Originally Posted by derickwm View Post
So I'll only be in trouble if I'm running my 6990 at 100% use for large amounts of times?
Well I'd say it would be best to open a new thread and ask about it, I don't fully know the extent of what extra power draw does to a PSU/Graphics card, as said above, the wires would get warm because of the extra current and could potentially melt if too much heat was generated, but I dont know if there are any other effects. Hopefully it wont be an issue if that PSU is quality.

Good luck with it
    
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post #17 of 18
you want to check out the volt modding forum. Although its possible to brute force volt mod a gpu by forcing more voltage into it directly from the psu, the best way to manipulate voltages is to find the main IC chip that runs the cards graphics processing and pin point a specific leg on that chip (FB) ( find it on the data sheet) and run a connection from the fb leg to a ground with a resistor.

you want to look for trimmers or potentiometers? which are essentially variable resistors. This basically will pump more voltage into your vcore beyond the limit of voltage regulating programs allowing larger overclocks and subsequently creating higher temptures.

To do all this you'll need some wires, solder (a real thin gauge and high quality), a good soldering iron that doesn't have too high of a wattage, a digital multi meter and some old PCBs to train on. First and foremost check out the volt mod section, its addicting and allowing sweet overclocks!
post #18 of 18
Quote:
Originally Posted by jjpctech View Post
Well His PSU will allow it to take more power, the wires will just warm up slightly more.

if they pull to much juice the wires would melt
Lol will proby do what my psu did it tried to pull to much from the mother board atx connector and got so hot the plastic on my psu connector melted and pretty much screwed up the seasonic 850. But i was using the right connectors but a 5970 and 5870 highly overclocked.
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