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Cooler Master EX2 625W is good for Crossfire?

post #1 of 11
Thread Starter 
I want to do an HD 6850 Crossfire, but I don't know if that power supply can handle the Crossfire, or even if is good, right now is the only PSU that I can buy since the modular PSUs are incredible expensive in my country.

PC Specs:
CPU: Intel Core i7 870 3.60Ghz (OC)
GPU: Gygabyte Windforce HD 6850 (850/1100)
MB: Asus P7P55D PRO
RAM: 12GB Kinston HyperX
HDD: Caviar Blue 500GB + Scorpio Blue 160GB
PSU: CM Extreme Power Plus 500W
post #2 of 11
Quote:
Originally Posted by MarioM2406 View Post

I want to do an HD 6850 Crossfire, but I don't know if that power supply can handle the Crossfire, or even if is good, right now is the only PSU that I can buy since the modular PSUs are incredible expensive in my country.

PC Specs:
CPU: Intel Core i7 870 3.60Ghz (OC)
GPU: Gygabyte Windforce HD 6850 (850/1100)
MB: Asus P7P55D PRO
RAM: 12GB Kinston HyperX
HDD: Caviar Blue 500GB + Scorpio Blue 160GB
PSU: CM Extreme Power Plus 500W

Dont use that PSU its not very good you sould replace it

And no even if it could do 500 watts which it cant its not enough for two video cards
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Seravee
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by shilka View Post

Dont use that PSU its not very good you sould replace it

And no even if it could do 500 watts which it cant its not enough for two video cards

Right now I am using just one HD 6850 which de 500W PSU that I have is enough for handle my system, but I want to buy another one so why is not so good the EX 625W? I mean, that PSU have two 6-pin connectors
post #4 of 11
http://www.hardwaresecrets.com/printpage/Cooler-Master-Extreme-2-475-W-Power-Supply-Review/1550

Poor voltage regulation where the +12v rail went out of ATX spec at 380w. It also offer poor DC quality output, where it too went out of specs on the 5v and -12v.
Now that's on a 475w unit. If this poorly design platform already have trouble with drawing that, I expect no less of the higher wattage unit you are getting.

Your current unit also offer poor DC quality output, where the ripples of the 12v rail went out of spec at <400w.

Sorry to say, but both are trash and should not be used in your system.

Where are you from? What's your budget? If there's any links to sites that you can buy from, please link them.
Edited by qwan456 - 6/9/13 at 9:37pm
post #5 of 11
Quote:
Originally Posted by MarioM2406 View Post

Right now I am using just one HD 6850 which de 500W PSU that I have is enough for handle my system, but I want to buy another one so why is not so good the EX 625W? I mean, that PSU have two 6-pin connectors

It does not matter what it says on the box on the website or anything Cooler Master says they are not the ones that have built it its some crappy no name OEM

All that matter with a PSU is how its built and made not how many connectors not even how many watts they say it can do which it cant by the way as its made so bad

Sory to say its crap both of them

Dont belive anything they say or you read thats what pro reviews are for sorting out the trash from the good
Quote:
Originally Posted by qwan456 View Post

http://www.hardwaresecrets.com/printpage/Cooler-Master-Extreme-2-475-W-Power-Supply-Review/1550

Poor voltage regulation where the +12v rail went out of ATX spec at 380w. It also offer poor DC quality output, where it too went out of specs on the 5v and -12v.
Now that's on a 475w unit. If this poorly design platform already have trouble with drawing that, I expect no less of the higher wattage unit you are getting.

Your current unit also offer poor DC quality output, where the ripples of the 12v rail went out of spec at <400w.

Sorry to say, but both are trash and should not be used in your system.

Where are you from? What's your budget? If there's any links to sites that you can buy from, please link them.

Pretty much that as well thanks
Edited by shilka - 6/10/13 at 5:05am
Seravee
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Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
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Seravee
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CaseMouseMouse PadAudio
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post #6 of 11
Quote:
Originally Posted by MarioM2406 View Post

Right now I am using just one HD 6850 which de 500W PSU that I have is enough for handle my system, but I want to buy another one so why is not so good the EX 625W? I mean, that PSU have two 6-pin connectors

The 6850 @ 820MHz consumes less than 140w under 100% load (Source). With 850MHz it shouldn't exceed 160w.
So even if you have both GPUs & CPU under 100% load at the same time, the entire system will consume less than 480w.
And this is not a realistic representation of real world usage unless folding on both CPU & GPUs...etc.

Point is, a quality 500w unit should be enough for your setup.

Look up this list & find one that's on sale in your country.

Or, you can provide your budget and a link for the shop you're buying from, and we can offer suggestions based on it.
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TheSadFlute
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by eXXon View Post

The 6850 @ 820MHz consumes less than 140w under 100% load (Source). With 850MHz it shouldn't exceed 160w.
So even if you have both GPUs & CPU under 100% load at the same time, the entire system will consume less than 480w.
And this is not a realistic representation of real world usage unless folding on both CPU & GPUs...etc.

Point is, a quality 500w unit should be enough for your setup.

Look up this list & find one that's on sale in your country.

Or, you can provide your budget and a link for the shop you're buying from, and we can offer suggestions based on it.

I forgot to say that I use a CM Extreme Power Plus 500W psu, I live in El Salvador, here just with shipping i can buy a good PSU, the EX2 625W cost about 85$ here and a CX750W cost around 120$I only have these two options, if the EX2 is not good enough to handle a Crossfire setup I ll wait to buy the CX750
post #8 of 11
Quote:
Originally Posted by MarioM2406 View Post

I forgot to say that I use a CM Extreme Power Plus 500W psu, I live in El Salvador, here just with shipping i can buy a good PSU, the EX2 625W cost about 85$ here and a CX750W cost around 120$I only have these two options, if the EX2 is not good enough to handle a Crossfire setup I ll wait to buy the CX750

Neither is recommended.

Can you buy from newegg/amazon? Not sure if they ship to your country, but if they do, the Capstone 550w is a high-quality unit & is more than enough for your setup. (although I truly believe the Capstone 450 would also be enough).
You can also look at the Antec 520 HCG
or the XFX Core Edition 550.
Or the Silencer MK-III 500
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TheSadFlute
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post #9 of 11
Well, as I said, your CM Extreme Power Plus isn't a good unit either. It cannot deliver 500w without going out of ATX specs.

Anyways, the CX750w is build on a solid platform. It's a CWT PUQ-B like the Thermaltake Smart TP-750M. It just a cost down variant of it, where it uses lower rated temp caps on the primary, cheap SamXon caps on the secondary, and a sleeve bearing fan. Due to this, I don't usually recommend it if there are other options

Do you have any links to a website that you are able to buy from?
Edited by qwan456 - 6/10/13 at 7:36pm
post #10 of 11
Thread Starter 
Thanks guys, it was very useful to me, I was so close to buy the EX2 625W PSU that now I know that is not good for a Crossfire setup I will be looking for the Corsair CX 750W that I mentionated before for the HD 6850 Crossfire.
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