Would An Eneremax Galaxy DXX Be Enough For My Rig?

[Mpyra]

Sorry forgot to mention watts in title: 850w

I am going to be testing two different processors, these are the Phenom 955 and i7 920 both overclocked to as close to 4GHZ as they can get.

Three GTX275's overclocked and in SLI.

Not sure about Ram.

A 640gb western digital hard drive.

A single DVD drive.

A single case fan.

A fan for cooling CPU.

 

[JohnnyLucky]

darn! I don't have any references for 3 GTX275's in tri-SLI mode. I know that Nvidia recommends a 550 watt power supply for one GTX275. I also know the GTX275 itself maxes out at about 219 watts. I'm thinking 850 watts might be okay.

 

[Mpyra]

darn! I don't have any references for 3 GTX275's in tri-SLI mode. I know that Nvidia recommends a 550 watt power supply for one GTX275. I also know the GTX275 itself maxes out at about 219 watts. I'm thinking 850 watts might be okay.

Well 219x3 doesn't really sound too hopeful to me and how would their power consumption be effected by overclocking?

 

[saaiello]

Power consumption will be lower in TRI SLI mode especially if they are running at x8 x8 x8 which is probably what you will be running them at.

Use neweggs power supply calculator tho if your running an I5 with 8 gigs of ram i got a number of 1100 watts you need to run that system.

http://educations.newegg.com/tool/psucalc/index.html?Tpk=power%20supply%20calulator

 

[JohnnyLucky]

I took a look at the Nvidia web site. Site navigation isn't exactly user friendly. I did manage to fine a web page that listed SLI certified power supplies for both dual and triple SLI for specific graphic cards:

http://www.slizone.com/object/slizone_build_psu.html

Unfortunately the GTX275 is not listed. Looking at the GTX 260 and GTX 280 it appears the rock bottom minimum is 1,000 watts depending on the psu brand and model. Don't quote me on that because the GTX 275 is not listed.

 

[Mpyra]

Power consumption will be lower in TRI SLI mode especially if they are running at x8 x8 x8 which is probably what you will be running them at.

Use neweggs power supply calculator tho if your running an I5 with 8 gigs of ram i got a number of 1100 watts you need to run that system.

http://educations.newegg.com/tool/psucalc/index.html?Tpk=power%20supply%20calulator

Why would i be running them at 8x8x8?

The Rampage II Extreme runs TriSLI at 16x8x8.

Do you think i won't be able to find a AMD compatible board with the same capabilities?

On the AMD board front, I've just found out that AM3 processors can run on AM2+ boards, which would allow me to stick to DDR2 which would make for a great budget option PC , it would have to score higher than the i7 in Crysis though.

Getting 16x8x8 is more important to me than avoiding DDR3 though.

So what would stop these cards from running at 16x8x8 and what would power consumption be if they did run at 16x8x8.

Thanks.

 

[Mpyra]

I took a look at the Nvidia web site. Site navigation isn't exactly user friendly. I did manage to fine a web page that listed SLI certified power supplies for both dual and triple SLI for specific graphic cards:

http://www.slizone.com/object/slizone_build_psu.html

Unfortunately the GTX275 is not listed. Looking at the GTX 260 and GTX 280 it appears the rock bottom minimum is 1,000 watts depending on the psu brand and model. Don't quote me on that because the GTX 275 is not listed.

I think nVidia tend to exaggerate power requirements, but i think your right, seems 1000w is going to be the least i am going to get away with.

Thanks.

 

[Mpyra]

I took a look at the Nvidia web site. Site navigation isn't exactly user friendly. I did manage to fine a web page that listed SLI certified power supplies for both dual and triple SLI for specific graphic cards:

http://www.slizone.com/object/slizone_build_psu.html

Unfortunately the GTX275 is not listed. Looking at the GTX 260 and GTX 280 it appears the rock bottom minimum is 1,000 watts depending on the psu brand and model. Don't quote me on that because the GTX 275 is not listed.

Oh, and they actually do have the 275 on that page, it's grouped with the 8800 Ultra.

The Antec-850-CP is in the list...

 

[Mpyra]

The OCZ GameXStream 850w is another option, only £80 including delivery and the option to return within 10 days from e buyer:

http://www.ebuyer.com/product/124736

Option to return is useful in case it doesn't work.

It seemed to perform well in reviews living up to it's claim of 85% efficiency even when tested slightly beyond it's rated output of 850w.

 

[Mpyra]

There's also the Cooler Master Real Power 850, which is a modular PSU, rated at 80 % .

I could get this for about the same price, here is an article on Tom Hardware, with the title Tom's New Reference System, this section of the article is about the PSU they chose which is the Cooler Master Real Power 850:

http://www.tomshardware.com/reviews/toms-reference-system,1748-8.html

"We looked around for a powerful and modern power supply unit. It's tough to pick the best product, as there have been various products with high output and 80+% energy efficiency. Cost wasn't an issue, and we wanted something really solid to support dual, triple and quad graphics setups, so our choice was the RS850-EMBA by Coolermaster"

So cost wasn't an issue and they chose this PSU for dual, triple and quad graphics setups?

Guess it should be good enough then...

Edit: Doh, article from late 2007...

 

[requiemsallure]

to be honest you might have to get a larger power supply than 850 as everyone is recommending, i know it won't take more power than that, but you are going to need 6x 6pin pcie connectors you have to find something to support that.

EDIT: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139013

and i would recommend this one for 140 after rebate.