Single AMD R9 290X Requires 750W PSU

[SonDa5]

I have a 290X that I am going to be running in my sig rig below and I'm concerned my PSU may not be enough.

750 Watt Power Supply is required.
1X150 Watt 8-pin PCI Express power connector is required.
1X75 Watt 6-pin PCI Express power connector is required.

From Sapphire's WEB site:
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1227&pid=2070&psn=&lid=1&leg=0#


Seems awfully high for a single video card.


I have a Seasonic Platinum 660W Platinum series that I hope can handle the job. I will also be amping my system to see how much amps it is producing with my 290x.

 

[trick0502]

I don't know how they came up with that number.

75+75+150=300
6 pin, pcie, 8 pin

That leaves 450 for the rest of the system. If you are running a fx 9370 maybe you need a 750.

 

[CaptNumbNutz]

That's the usual over exaggerated wattage number if you have a shitty PSU that they always quote to cover their own asses.

It sucks down no more power than a GTX Titan, and people have been running those in SFF systems with 450w Silverstone SFX PSU's for a while now.

You will be fine with the good quality Seasonic 660w you are currently using. 2 of them might be pushing it though.

 

[dragonstongue]

Maybe some custom ones will have more power requirements but the "stock" one is limited to ~300w Trick highlighted the official pci-e spec safety limits, they can and sometimes do overdraw on the pci-e some though they are not supposed to.

They always throw this number higher then it needs to be as many folks do try to run high wattage stuff on POS PSU or makers(dell and the like) to have a ball figure on minimum power supply, so they need to highball it, they generally take a fairly loaded modern system to do a "spec"

In this case test system of
overclocked 4960x at 4.2
x79 motherboard
840 EVO SSD
4x8 gb 1866 memory
http://www.anandtech.com/show/7457/the-radeon-r9-290x-review/19

the system wattage full heaviest load
290x uber mode 405w or to simplify 33.75a
GTX780 365w or30a
Titan 349w or 29.08a
7970GHe 367w or 30.58a

They state "gaming loads" should be around the 250w for card alone.

"With that in mind, as we can see there’s no getting around the fact that compared to both 280X and GTX 780, power consumption has gone up. At 375W at the wall the 290X setup draws 48W more than the GTX 780, 29W more than GTX Titan, and even 32W more than the most power demanding Tahiti card, 7970GE.

Still it’s clear that AMD’s 9% average performance advantage over the GTX 780 is going to come at a cost of more than a 9% increase in power consumption. Or versus the GTX Titan, which the 290X generally ties, 290X is still drawing more power. The fact that AMD is delivering better performance than a GTX 780 should not be understated, but neither should the fact that they consume more power while doing so.

Many good quality 550+ should be fine(like Seasonic as an example which have 40+ amps and can load to 550w and still stay cool, but would be better 600-750 for many reasons, for dual you would be better to have 800-850 even though this is quite a bit higher then it would "need"

 

[okashira]

I run a 430W (CX430) with an overclocked 4670K (4.4GHz) and an overclocked 7970,
1TB of older SSD's, 3TB of WD green drives in RAID 0 and a blu ray drive.

They are overstating like all enthusiasts do.

 

[dragonstongue]

430w I can 100% be certain you are loading that to the extreme with that setup, you really should kill-a-watt it before it kills itself, that just is not a good idea. 225-260w for stock clock 7970GHe so you are basically chewing 1/2 of the available power just with the 7970 alone, hey its your $$.

 

[okashira]

430w I can 100% be certain you are loading that to the extreme with that setup, you really should kill-a-watt it before it kills itself, that just is not a good idea. 225-260w for stock clock 7970GHe so you are basically chewing 1/2 of the available power just with the 7970 alone, hey its your $$.

I like to live on the edge.

I have hit it with my kill a watt.

max I saw in Unige heaven benchmark (absolute peak) was 380W at the wall. I feel OK. (that was with the two 1.5TB drives and blu ray drive disconnected at the time.)
42W idle.

Ive since connected those drives, and been playing FC3, Tomb Raider and BF4 and no issues. ofc the 1.5tb drives and blu ray drive are not working while gaming :-D

I will upgrade if I see a platinum 500W - 550W for a good price.

S