Molex Adapters to PCIe-6

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Biledriver

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Aug 18, 2013
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Hello:
I recently bought a SolidGear 750W PSU for dirt cheap but it turned out to be falsely advertised with 2x PCIe 6pin and 2x PCIe 8pin when it only has one of each. This was for a new build with a GTX 760 and the idea was to get a second one down the road for SLI but now this PSU can't do it. But with the card it came with adapters I never knew about: 2x molex to 1x PCIe 6pin and 1x PCIe 6pin to 1x PCIe 8pin. So now I am thinking for the new GTX 760 which requires a 6pin and a 8pin PCIe power connection I can go with 4x molex power connections and adapters to power the second GTX 760. Basically I am wondering if there are any problems with going this route and if this is a viable solution to my PSU problem.
Thanks
 
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Novuake

Novuake

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There is a reason why we do not buy cheap PSUs, I would not use that powersupply AT ALL, I doubt it could even can deliver anywhere near 750W.

You get what you pay for when it comes to PSUs. NEVER cheap out on it, its the most important component in a system.
 
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Pinhedd

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Aug 7, 2007
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As Novuake said above, cheap PSUs are dangerous. Even if you could wrangle up some sort of combination of cables that resulted in the desired configuration, the PSU itself would probably explode.
 
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Novuake

Novuake

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NOT an exaggeration... :)
People really think we can't be serious when we say cheap PSUs are dangerous.
 
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Biledriver

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I thank you for the advice but, if it helps, consider the same question for some $150 CoolerMaster PSU that was falsely advertised and still only has 1x PCIe 6pin and 1x 8pin. :D The PSU had good reviews despite the inadequate PICe connectors and I said it is dirt cheap because I believe I got it for the wrong price ($38) while not on sale and quickly after the price was jumped up to $58. It is still a inexpensive PSU but so far it works great and the cables were meshed-cased very nicely. It was a budget-gaming build and the PSU fit the bill nicely. But with all the concern I might have to upgrade it with the second GTX 760 in the future. With the current GTX 760 and i5 4670k without overclocking I am still comfortable with this PSU.

Regardless, I am still looking more for the technical pros and cons of creating a PCIe 6pin and 8pin connector out of four molex connectors.
 
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Pinhedd

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All PSUs work great until the crummy rectifiers on the primary side catch fire. If the PSU is particularly shoddy it may even lack full galvanic isolation, which risks exposing sensitive ASICs to unfiltered 120VAC. The $40-$80 between a crummy PSU and a decent PSU is what it takes to ensure that your PC doesn't get turned into a paperweight.

Furthermore, I wouldn't trust any PSU that has documentation which does not reflect the internal design of the PSU. If the box or manual misstate the number of connectors, what else have they overlooked?
 
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Biledriver

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I will probably upgrade the PSU then. The concern seems to be directly solely at the PSU itself and not the adapter configuration so I am going to take that as meaning the configuration is adequate if you have a good PSU to back it up (which also means the configuration would be unnecessary because any good PSU would have enough PCIe connectors for the second card anyway :D ).

Thank you for the advise.
 
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Pinhedd

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Yeah, that's what I was hinting at above. Adapters aren't usually necessary if you've purchased a decent quality PSU.
 
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