GPU and PSU comaptibility?

[davyb]

Hi Peeps

So i need some advice as I do not want to make a mistake when acquiring a new GPU. I have sold my GPU and need another but on my PSU there are 8pin plugs and the cables has 2*6 pins to plug into the GPU. So can I get a GPU that has a 6 and 8pin requirement and then will I only need another cable if this is the case? My PSU is a vantec ion2 plus modular supplu unit. Thanks in advance!

 

[DeWiT777]

Just get a molex to 8pin adapter. Most of the time you are given these with a new gpu.

 

[davyb]

Ok thanks man

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[KLEAN_upguy]

no just plug the 8 pin and 6 pin in thats why they call it a 6+2 pcie cable

 

[ThatGuy_ZA]

Nooooo, stay away from molex converters!

As [MENTION=25969]KLEAN_upguy[/MENTION] said, most PSU's have 6+2 pin connectors so you can use them as either 6 pin or 8 pin connectors. They look like this:

 

[WiZard]

no just plug the 8 pin and 6 pin in thats why they call it a 6+2 pcie cable

From what I understand, he has only the 6 pin cables (even though the PSU makes provision for 8 pin (6+2) cables).

 

[WiZard]

[MENTION=22662]davyb[/MENTION], the extra 2 pins are both ground pins, so if you need them, get the molex adapters, and only connect those 2 from the molex adapters, while still using the original 6 pin connectors direct from the PSU to supply the +12V (the molex adapter(s) must therefore be 6+2 and not 8 pin).

 

[davyb]

Ok so I can also get a GPU with 8 pin requirements, that's cool then

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[KLEAN_upguy]

See the problem is that psus are rated...firstly make sure you have enough power to handle a 8pin and 6 pin pcie...a common mistake some make is using those molex jacks on psus that are not powerful enough to run a particular gpu .So how much is the rated power,how many amps on 12v rail and what particular gpu you running...8 pin alone can deceiver max up to 150 watt and a 6pin is 75watts...so tdp of your gpu can run well round 225 watts.Lets not forget cpu +o.c...few hardrives and fans to cool.Also some psus are rated over multiple 12v rails so some pcies can run independently on a particular 12v rail.

 

[davyb]

I have got a vantec ion2+ 800w psu and I now know I will be getting a Asus gtx670 dc-u-ii and it uses 6 pin connectors so it seems no problems there

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[KLEAN_upguy]

Vantec ? Vantec ION2+ 700-1,000 Watt Power Supply - VAN-700~1,000A - 700~1,000 Watt ATX Power Supply
It left me rather confused adding up that watts for each rail. Vantec stated that 800 watt psu had 4 12v rails
22A 22A 36A 36A respectively together they equal a crazy 116 amps.So in total that's 1392 watts on the 12v rail...so thats a 1500 psu?? Vantec seems to be lieing i can find a single decent review of this psu.

If it can provide the stated 800watts go for it,and im not saying its a pariculary bad psu you have It's power capabilities seems unknown but i would advise geting your self a more trusted psu unit...depending on your setup a 600-700 psu may even do the trick.

 

[davyb]

I used to run Gtx460's in SLI on this psu

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[KLEAN_upguy]

then do for it 1 gtx 670 draws roughly the same power as 1 gtx 460(gb 256bit version)

 

[davyb]

Vantec ? Vantec ION2+ 700-1,000 Watt Power Supply - VAN-700~1,000A - 700~1,000 Watt ATX Power Supply
It left me rather confused adding up that watts for each rail. Vantec stated that 800 watt psu had 4 12v rails
22A 22A 36A 36A respectively together they equal a crazy 116 amps.So in total that's 1392 watts on the 12v rail...so thats a 1500 psu?? Vantec seems to be lieing i can find a single decent review of this psu.

If it can provide the stated 800watts go for it,and im not saying its a pariculary bad psu you have It's power capabilities seems unknown but i would advise geting your self a more trusted psu unit...depending on your setup a 600-700 psu may even do the trick.

When searching on google I see [MENTION=18288]shimmie[/MENTION] actually sold one of of these on Carbon in August of 2011

 

[KLEAN_upguy]

i see so...awesome guy always has excellent hardware hence the name mr.Overkill hehe,but regardless...that label is a complete lies on that psu.
This is a thread started by carbonites old psu expert...but his long gone,that particular page shows gpu power and amps...
http://www.carbonite.co.za/f20/unof...ids-psu-thread-image-heavy-55728/index14.html