• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

PowerColor Devil 13 Dual Core R9 290X

stulid said:
Sure I seen it said, because some PSU's have multiple rails and you dont want to be pulling all from a single rail so you need to check where the cables are connected on a multi rail PSU.
http://www.legionhardware.com/articles_pages/amd_radeon_r9_295x2,3.html
Click to expand...

Cheers :)

Found it - You mean this?

"For dual-card installation, a second pair of 8-pin power connectors is required and additional power current support is required.
It is not recommend to use any power adapters or dongles for the 8-pin power connectors."
 
Cant remember who it was, (James?) but he ran 7990's off daisy chained cables and burnt out the connectors on his psu (was using a superflower 1000 / 1200 plat if I remember right)
 
I think they are referring to molex adapters etc with that statement.

As some multi rail PSU's dont do 28A dedicated AMPS per rail,

This beast is "only" 25A per rail - http://www.overclockers.co.uk/showproduct.php?prodid=CA-298-SV&groupid=701&catid=123&subcat=2464

This one is 30A per rail - http://www.overclockers.co.uk/showproduct.php?prodid=CA-315-SV&groupid=701&catid=123&subcat=2464

I guess they are saying to ensure you are not daisy chaining of a single rail and making sure you use a separate cable across different rails from the PSU, a single rail PSU I guess doesn't matter so much.
 
stulid said:
I think they are referring to molex adapters etc with that statement.

As some multi rail PSU's dont do 28A dedicated AMPS per rail,

This beast is "only" 25A per rail - http://www.overclockers.co.uk/showproduct.php?prodid=CA-298-SV&groupid=701&catid=123&subcat=2464

This one is 30A per rail - http://www.overclockers.co.uk/showproduct.php?prodid=CA-315-SV&groupid=701&catid=123&subcat=2464

I guess they are saying to ensure you are not daisy chaining of a single rail and making sure you use a separate cable across different rails from the PSU, a single rail PSU I guess doesn't matter so much.
Click to expand...

Exactly, if you have a multi-rail PSU, lets say Two or Four 30A Rails , you would not want to put the GPU on a rail thats also powering the CPU.

If like me you only have one huge rail you can plug the the cables whatever way you want, as its all running off the one 60 odd amp rail and has enough to power everything off that one rail.

Pluging a top of the line power hungry GPU to random Molex Rails with an adaptor is suicide, they are simply saying "don't do it"
 
vsg28 said:
Ya, pretty much that. No one in their right mind uses a multi rail PSU on behemoths like these anyway.
Click to expand...

Not everyone checks whether a PSU is single or multi rail, they see a huge wattage and know its from a great brand such as the Silverstone and assume its going to be hunky dory.
 
stulid said:
Not everyone checks whether a PSU is single or multi rail, they see a huge wattage and know its from a great brand such as the Silverstone and assume its going to be hunky dory.
Click to expand...

Sad but true.

This card will be interesting because it pretty much eliminates water cooling unless you go with universal blocks. No way anyone is making a full cover block for it.
 
Jaesus, 4 8 pin connectors!! That's 675w of card right there!! Beastly. Stick a decent backplate on it and we have our dual card winner.
 
So, I sell my EVGA 780SCs with titan standard coolers boxed on the MM and then pay the extra for this.
What extra outlay do I spend?
What % performance do I gain @1600p(4k soon)?
Will a 1200w coolermaster gold even run it? ( EDIT answered this myself 98A on 1 rail so yeah it's good to go)
 
Last edited:
The card will draw what it needs regardless of power connectors. If the PSU is not up to it, then it will just turn off or break. The card wont draw 150w from each 8 pin and a further 75 from the PCIe simply because it wont need that much.

If you only gave the GPU two 8 pins, itl just draw the extra current through the 8 pins if the PSU can handle it.
 
bemaniac said:
So, I sell my EVGA 780SCs with titan standard coolers boxed on the MM and then pay the extra for this.
What extra outlay do I spend?
What % performance do I gain @1600p(4k soon)?
Will a 1200w coolermaster gold even run it? ( EDIT answered this myself 98A on 1 rail so yeah it's good to go)
Click to expand...

Unless you're gunning for 4k I'd personally just clock the nuts off the SC's til the next gen is out and about, not enough of a boost for the extra outlay for my tastes...
 
How come the reference 295x2 doesn't have 4x8pin? does it throttle a lot?

I mean if you look at the figures the 4x8pin shouldn't really be a shock...

Reference 290X = 300W
Reference 295x2 = 375W
Powercolor 295x2 = 675W

...if anything it's shocking that the reference 295x2 can only pull 375W when you consider a single 290X pulls 300W by itself.
 
Last edited:
Who said the reference 295x2 can only pull 375W? It has a TDP of 500W. Take a look at this thread itself- the PCI-E connectors can provide way more power than their theoretical limits.
 
vsg28 said:
Who said the reference 295x2 can only pull 375W? It has a TDP of 500W. Take a look at this thread itself- the PCI-E connectors can provide way more power than their theoretical limits.
Click to expand...

So they are breaking PCI-SIG specification on the reference card? isn't that a bit dangerous to be ignoring PCI-E compliance? I mean most PSU's expect compliancy and have their overall output spread over multiple rails.
 
It is only dangerous if the PSU doesn't have the minimum amps on each rail being used, hence why the card has recommendations for the PSU needed. Most high wattage PSUs these days are single rail as it is.
 
You must log in or register to reply here.
Back
Top Bottom