Cit 750ub PSU to GTX 1070 question

[Dominic_17]

I am getting a GTX 1070 tomorrow and just want to confirm something. My current card is a GTX 970 which has 2 6 pin pci e cables attached to it, one goes straight to the psu the other is connected to a molex which also goes to the psu. The 1070 has an 8 pin connection so am I right in thinking I can use a 2 molex to 8 pin cable (which I have) to connect the card to two molex connectors from the psu? This would leave the psu pci-e cable redundant, or do I need to get a dual 6 to 8 pin pci-e adapter (which I don't have)? PSU is a Cit 750ub unit. Thanks in advance.

 

[Zerk2012]

You need a new power supply the one you have is very low quality.

 

[Barty1884]

This guy?
https://www.amazon.ca/750W-Power-Supply-Unit-Rails/dp/B002Q8HFEI

I wouldn't.

Dual 12V rails, 20A on each (in theory that maxes out at 480W, in practice it would be a little lower (probably nearer 400W).

While 400W should be sufficient for most rigs with a 1070.... I wouldn't trust it, especially if using adapters from molex.

Generally, if a PSU needs adapters/connectors to work, you shouldn't be using it.

CiT can be very hit & miss as far as quality.... I can't find any reliable review on this one, but I suspect it's more than likely a huge miss.

I'd replace the PSU before potentially risking your shiny new 1070.

 

[mcnumpty23]

yeah i agree i wouldnt plug a cit into my gtx1070

i cant even say cit without thinking s**t

 

[Dominic_17]

New PSU tomorrow as well then by the looks of it, will a 550W one be sufficient or should I go higher? Also which makes are the best for PSUs? Cheers.

 

[Barty1884]

Brands are near impossible to say. SeaSonic are about the only brand you can judge on name alone.

Others, it really depends on the specific model.

A quality 550W is fine, unless you're pairing the 1070 with one of the higher TDP AMD chips (9590 etc).

Where are you located?

 

[Dominic_17]

UK, Bucks.

 

[Barty1884]

You're looking between 60-80 quid in the UK for something quality.
http://uk.pcpartpicker.com/product/qYTrxr/evga-power-supply-220g20550y1
http://uk.pcpartpicker.com/product/nB3RsY/seasonic-power-supply-s12ii620bronze
http://uk.pcpartpicker.com/product/3hkwrH/corsair-power-supply-cp9020102na

The EVGA and SeaSonic are comparable in quality, the EVGA is modular, the SeaSonic isn't.
The Corsair CXM550W is a little worse in quality (still good though), and semi-modular.

 

[mcnumpty23]

look for a psu with a minimum of a 5 year warranty is always where i start from

some like evga supernova g2 now go right up to a 10 year warranty

any one offering a 10 year warranty on their psus clearly has plenty of confidence in their product

as always it comes down to how mucch you want to spend but i never ever skimp on my psu

edit typed at same time lol--but see the supernova g2 already got a mention

 

[Dominic_17]

I take it 2nd hand would be a no go?

 

[mcnumpty23]

I take it 2nd hand would be a no go?

a £400 gpu on a second hand psu?

absolute no go for me but your choice

 

[Barty1884]

Pretty much.

Unless it was a high quality unit to begin with, is less than a couple of years old and you can verify it hasn't been run @ 100% capacity for a long time.

Too many possibilities, and all very hard to verify second hand.

On the plus side, if it's a quality PSU to begin with, it'll have sufficient protection that, if it fails it won't damage the rest of your components.
Doesn't really help much though as, if it fails, you're out the cost of the second-hand PSU and still need to buy a reliable one.

Smarter to buy new.

 

[Dominic_17]

Are Evo-labs or pulse power any good?

 

[mcnumpty23]

Are Evo-labs or pulse power any good?

never heard of them so at a guess probably not

 

[Barty1884]

No.

Honestly, the PSUs I listed are the cheapest, quality PSUs available new in the UK.

 

[Dominic_17]

Thanks for your advice, I will go for one of those then.

 

[mcnumpty23]

Thanks for your advice, I will go for one of those then.

the evga although it costs more has a 10 year warranty and would be my choice

but yes any of those he listed are good