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Graphic card installation puzzle


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8 replies to this topic

#1 webrat

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Posted 15 January 2016 - 09:26 AM

Hey folks,

 

I'm looking to buy this http://www.amazon.co.uk/gp/product/B00NNXVPS2?redirect=true&ref_=nav_ya_signin&tag=hotukdeals03-21 (Zotac GTX970) but I've got a problem I can't figure out.

 

My PSU is a Corsair CS550M and I've currently got a single 6 pin slot and a single 4+4 pin slot available. As you will see from the link the card itself has 2 molex to 6 pin adapters, both of which are required to run at peak draw. I'd like to get this card as the price is low for the spec but I'm wondering:

 

a ) Does a 4+4 connection supply the same voltage as a 6 pin, and

 

b ) Is there a way to adapt that 4+4 for use with a 6 pin connector

 

I've looked around on the web but have ended up more confused rather than less so thought I would give this a go.

 

Cheers


Edited by webrat, 15 January 2016 - 09:26 AM.


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#2 Captain_Chicken

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Posted 15 January 2016 - 11:17 AM



Please download and install Speccy to provide us with information about your motherboard. Clicking on this link will automatically initiate the download.

When Speccy opens you will see a screen similar to the one below.

speccy9_zps2d9cdedc.png

Click on File which is outlined in red in the screen above, and then click on Publish Snapshot.

The following screen will appear, click on Yes.

speccy7_zpsfa02105f.png

The following screen will appear, click on Copy to Clipboard.

speccy3_zps1791b093.png

In your next post right click inside the Reply to Topic box, then click on Paste. This will load a link to the Speccy log.

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#3 webrat

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Posted 15 January 2016 - 12:24 PM

Thanks for the response. Here's the Speccy log.

 

 

http://speccy.piriform.com/results/UvuZkpguoExkTbanvy3ib4t



#4 webrat

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Posted 15 January 2016 - 04:48 PM

think I may have answered my own question following further research. It looks like the 4+4 CPU Power socket is actually a PCI-E 6+2 (i.e 8 pin) socket as well. This is seriously unclear on the psu itself but googling arouind strongly suggests this is the case. If anyone out there can confirm this or is running a GPU off that 8 pin socket I'd appreciate any comment. 

 

 

Cheers



#5 ScathEnfys

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Posted 15 January 2016 - 05:23 PM

Are you absolutely sure that this is the case? I was under the impression that the connectors were keyed differently or provided different voltage at different places
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#6 webrat

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Posted 15 January 2016 - 06:17 PM

No, I'm not 100% sure but I've just dug around in my cable box from the build and found a cable with a 'type 3' plug at one end and 2x 6+2 PCI-E plugs (clearly marked) at the other. This definitely comes from the PSU and fits the 8 pin socket in question perfectly. As you said, the various plugs are keyed differently, again suggesting that this socket is intended for PCI-E, possibly in addition to CPU power with its 2x4 pin plugs. I'd really love a definitive answer on this but It's proving elusive.



#7 webrat

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Posted 17 January 2016 - 08:35 AM

Just for reference for anyone else with the same question. This is definitely a usable 6+2 PCI-E port. It's actually a dual purpose port for 4+4 CPU and PCI-E and can be safely used as such. You can run both gpu power requirements e.g a 6 and 8 pin or a 6 and 6, or just one of these (as required) off this single port. 



#8 ScathEnfys

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Posted 17 January 2016 - 11:31 AM

Oh, I see, you were talking about the port on the PSU rather than the cable. My bad.
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#9 webrat

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Posted 17 January 2016 - 04:53 PM

No worries, just glad it's resolved. The new GTX 970 seems quite happy with the arrangement lol






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