Splitter vs SATA to PCI-E

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Wilhelm Sorban

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Jun 9, 2014
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I have a Corsair HX750W and a HD6970 GPU.
Since I recently bought another GPU of the same kind, I realized I am missing the PCI-E cable, and I am having trouble finding a replacement, since Corsair only ships to US, and resellers don't have it.

So my question is:
Which one should I go with?
Will my two connector GPU work well while being a little bit overclocked (only as high as MSI allows), with an 8 pin female to 2 x 8 pin male Y splitter?
This is the item:
http://www.ebay.co.uk/itm/121340122463

Or will the SATA provite enough wattage/amp using this cable converter?
http://www.ebay.co.uk/itm/390729757737


Here is a link to my power supply:
http://www.corsair.com/en/hx-series-hx750-power-supply-750-watt-80-plus-gold-certified-modular-psu

And a link to my GPU's:
http://www.amd.com/en-gb/products/graphics/desktop/6000/6970#

I am using water cooling, which means that a little power is off of the card, since it doesn't need to power the fan anymore (might be significant, or not, just mentioning)
This is the GPU I bought:
http://www.ebay.co.uk/itm/121346761403?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Offtopic: Think I did a good deal buying the GPU?

Thanks in advance!
 
Solution
Ubrales


SATA devices are low power devices and that is why multiple SATA connectors are incorporated in the same SATA power cable. Consequently thinner gage wire is used for SATA power. Graphics cards use quite a lot of Amps and accordingly the connectors are limited on those power cables. One splitter is OK; not more than that.

I do not know the specific wire gage sizes used in these cables but know that it is not a good idea to power graphics cards using...
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Wilhelm Sorban

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Jun 9, 2014
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4,510
Thanks for your answer, but can you please also explain why you come to this conclusion?
Does the SATA power not offer enough output?
Is it not more than what a PCI-E would offer, if split?
If you could explain using the numbers from the specification, that would be great!

Thanks!
 
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Ubrales

Ubrales

Polypheme
Dec 3, 2009
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SATA devices are low power devices and that is why multiple SATA connectors are incorporated in the same SATA power cable. Consequently thinner gage wire is used for SATA power. Graphics cards use quite a lot of Amps and accordingly the connectors are limited on those power cables. One splitter is OK; not more than that.

I do not know the specific wire gage sizes used in these cables but know that it is not a good idea to power graphics cards using SATA power cables.
 
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Solution
Ubrales

Ubrales

Polypheme
Dec 3, 2009
13,234
8
61,465


Yes.

I used a Y-splitter for the 12V EPS power in order to supply two 8-pins inputs for CPU (overclocked) power on my motherboard. My PSU (AX 850) had only one available cable for this. Working fine since build 18 months ago.
 
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