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Discussion Starter #1
I purchased a great combo deal on newegg:
OCZ ModXStream Pro 700w + XFX 5770
All together, it was $45 for the psu & $155 for the gpu!

I don't think the psu can handle one, not even crossfire 5770s...but I hope it really can! Can you please check the statistics on the PSU on my link, and give me some feedback? Please!

http://www.compusa.com/applications/...115&CatId=2533

I'll type out the info, if you don't feel like clicking..I really want some advice on if I should sell it or not, because I am going to crossfire forsure!

AC INPUT 115V/230V - 60/50Hz
DC OUTPUT +3.3V +5V +12V +12V -12V -5V +5VSB
.........Watts 25A.. 25A ..25A.. 25A. 0.3A...- .....2.5A
700W
 

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hell yeah it can! I had a modxtream powering a q9450 a gtx 260 with a 9600gt for physx, 6Gb's of ram, and a 250GB hdd. This thing can easily power that stuff man. Oh, and mine was the 600w one too, so dont sweat it bro
 

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Discussion Starter #3
Quote:


Originally Posted by D3TH.GRUNT
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hell yeah it can! I had a modxtream powering a q9450 a gtx 260 with a 9600gt for physx, 6Gb's of ram, and a 250GB hdd. This thing can easily power that stuff man. Oh, and mine was the 600w one too, so dont sweat it bro


Really, because I heard I need 40a on a 12v rail for one XFX! The specs say 25a, but I am very new to all this


On the back of my XFX box it says 600w needed, but on a certain review I saw that I had only 550w total with all my 12v rails.

Still waiting on more info, and thanks for posting +rep
 

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Quote:


Originally Posted by xquisit
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Really, because I heard I need 40a on a 12v rail for one XFX! The specs say 25a, but I am very new to all this


On the back of my XFX box it says 600w needed, but on a certain review I saw that I had only 550w total with all my 12v rails.

Still waiting on more info, and thanks for posting +rep

yeah, im not too technical when it comes to psu's either. The thing i see when im picking a psu is whether it is over 80+ certified and preferably modular. I never listen to the power req. on the box, that is rubbish. I remember my 9600gt's box said it needed like 500w
lol. Trust me man, you are fine here, most modern psu's like this can handle some pretty high end cards, just remember that your pc will use much less than 700w at max load, so i would not see any issues arise.
 

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no no no it can most DEFINITELY power 2 5770's and then some. don't worry you should be good to go
 
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It'll easily power 5770 Crossfire. The 40a means for the whole computer, for Crossfire usually add 10a to that number (or a bit more/less depending on the card). I ran 3 cards (8600GTS for PhysX and 9600GSO SLI) on a Corsair CX400w along with a Q6600, it probably wasn't good for it but you plan on running only 1 card on a PSU rated 300w higher. The ModXStream could easily power a 5870, possibly even the 5970 (although that would be pushing it IMO). A single 5770 or 5770 Crossfire would be no issue
 
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Discussion Starter #7
then i might have to add some questions:

will 3 work well? im planning on playing Battlefield Bad Company 2
or am i really pushing it? the mobo i am buying only has 2 slots, but i can make a change
 

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Discussion Starter #8
i really need to know if i can power 3x5770s, because the layout on the ASUS Formula III isn't the best for my AM3 category
 

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Discussion Starter #9
i am purchasing in 1 hour, but still waiting on a response

i know you guys said 40a for the whole system so add 10a for cf <normally>

but what about 3x 5770s? can i do it, mana to use a cpu cooler..and maybe OC a wee bit?
 

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I would only use two, even then, I don't like the ModXStream line. Spend a bit more and get something with better quality.
 

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Discussion Starter #12
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Originally Posted by meticadpa
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The ModXStream line aren't amazing, but a single 5770 only uses like 94W or something.

You're fine.

and i cant even use 3 right? cuz i have only 2x 12v rrails?
 

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Quote:


Originally Posted by xquisit
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and i cant even use 3 right? cuz i have only 2x 12v rrails?

Rails have nothing to do with it. You are fine, 3 will work.
 

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Quote:


Originally Posted by xquisit
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and i cant even use 3 right? cuz i have only 2x 12v rrails?

It depends where the OCP is actually set at. Sometimes it isn't anywhere close to what is listed. The two PCIe and the molex connectors are on the same rail. If you were to use molex adapters to power a third 5770 they would all be on the same rail (apart from what it draws through the PCIe slot which is on the other rail). From what I have seen a 5770 will draw ~80-90W. I'd guess about 30 of that is through the PCIe slot. That would mean ~150-180W through the PCIe connectors on the second rail. With a limit of 25A there shouldn't be problems with the OCP tripping and the PSU shutting down, assuming you don't have a ton of stuff hooked up to the molex and sata connectors. But then I personally wouldn't run three on the 700W ModX Pro. Based on the 12V capacity (46A) and it's performance under higher temps I am more comfortable calling it an acceptable 600W. With a quad and some OCing involved I would stop at two 5770s, but it would probably run three.
 

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Might cause it to kick into high and make some extra fan noise when gaming more volts more heat, bigger PSU's don't do that I know my 1200w don't now.

My older PSU's 700w StealthXStream with 7900GTX SLI and 1000w silverstone with 8800GTX SLI would run a PSU hard when gaming they were overclocked high also, But 5770's use less power so you should be fine.
 

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Discussion Starter #16
Quote:


Originally Posted by shinji2k
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It depends where the OCP is actually set at. Sometimes it isn't anywhere close to what is listed. The two PCIe and the molex connectors are on the same rail. If you were to use molex adapters to power a third 5770 they would all be on the same rail (apart from what it draws through the PCIe slot which is on the other rail). From what I have seen a 5770 will draw ~80-90W. I'd guess about 30 of that is through the PCIe slot. That would mean ~150-180W through the PCIe connectors on the second rail. With a limit of 25A there shouldn't be problems with the OCP tripping and the PSU shutting down, assuming you don't have a ton of stuff hooked up to the molex and sata connectors. But then I personally wouldn't run three on the 700W ModX Pro. Based on the 12V capacity (46A) and it's performance under higher temps I am more comfortable calling it an acceptable 600W. With a quad and some OCing involved I would stop at two 5770s, but it would probably run three.

hmm, i do want to oc my 965 125w and my g.skill ripjaw 1600 4gb ram

so what do you recommend

the asus formula III for 2 or a gigabyte
 

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Discussion Starter #17
damn im still wondering what to do ><

2gpus, or be more future proof with 3!?!?

i think three might win
 

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Here's the psu selector chart from OCZs site.
http://www.ocztechnology.com/support...pply-selector/
Based on it if you run 2 of those cards you sound be fine because that card only requires one 6 pin pci-e connector to run it. But it doesn't even show one of there psu's running 3 cards until you get to the Z-Series psu's. In my opinion I wouldn't run more than two on it. It may be able to get the job done but I'd rather be safe than sorry. Power failure isn't something you want putting your rig down. Besides, even the card it self recommends a good 600 to 800watt psu just for running in crossfire. Unless you go Antec or PC Power & Cooling, I wouldn't go under 1000watts for running 3 cards. Just my opinion. Hope this helps.

Did I mention that I purchased that same deal during the black friday sale?!


Edit: Here's a link to a review done on this psu.
http://enthusiast.hardocp.com/articl...power_supply/9
 
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