View Full Version : JG OCZ GXS700 review question
Happy New Year! :beer:
http://www.jonnyguru.com/review_details.php?id=35
http://www.jonnyguru.com/PSU/GameXStream700/IMG_0600.jpg
The breakdown of the 12V rails on the GameXstream is very simple. There are four, but the first two are broken down like a standard ATX12V power supply with the CPU on one rail and everything else on the other. +12V3 and +12V4 go to each PCI-e connector. 18A on each rail for this, and this exclusively, is more than enough for even a quad-SLI system. The 12V leads are actually color coded with a green stripe, blue stripe and black stripe so it's easy to tell which connector goes to what rail.
Did you actually mean to say +12V2 & +12V4 go to each PCIe connector?
Is this truly a quad rail psu?
jonnyGURU
01-01-2007, 05:56 PM
Happy New Year! :beer:
http://www.jonnyguru.com/review_details.php?id=35
http://www.jonnyguru.com/PSU/GameXStream700/IMG_0600.jpg
Did you actually mean to say +12V2 & +12V4 go to each PCIe connector?
No. I meant to say +12V3 and +12V4. But what difference does it make? They're just labels. And with each one capable of the same output, it could be 1 and 2, 2 and 3, etc. Doesn't matter except for the fact that CPU is on one rail, each PCI-e is on each of two more and everything else on a fourth.
And yes... this is a "true" quad 12V rail PSU.
galapogos
01-03-2007, 04:56 AM
Follow up question - if I don't have a 2nd CPU or 2nd PCI-E card, isn't the 2nd rail going to waste and not used?
Adamantine
01-03-2007, 05:38 AM
If it were a single rail PSU, all that power would still be going to waste so it's not like it really matters...
jonnyGURU
01-03-2007, 07:31 AM
Follow up question - if I don't have a 2nd CPU or 2nd PCI-E card, isn't the 2nd rail going to waste and not used?
Only about 2 3/4A will remain "untapped."
(18*4)-(680/12)
Since there still only one real 12V output and they're split up with mere OCP circuitry. And if you don't have a dual core/dual CPU and don't have SLI/Crossfire, you don't need this much power in the first place. :D
Only about 2 3/4A will remain "untapped."
(18*4)-(680/12)
Since there still only one real 12V output and they're split up with mere OCP circuitry. And if you don't have a dual core/dual CPU and don't have SLI/Crossfire, you don't need this much power in the first place. :D
A bit off-topic question:
I've noticed that it says 680W on the label under the 12V rails, but few lines below, it also states that: "Maximum combined current for the 12V outputs shall be 50A"... so which one is correct?
galapogos
01-03-2007, 08:42 AM
Hehe true. I have the Epsilon 600W which is about the same except 100W less on the combined +12V rail. Bought it after my old Enermax Whisper quiet 431W suddenly failed. I didn't know about your site then, but I knew that FSP made great PSUs and this one was reasonably priced and I 600W would last me a long time, so I went for it. I wish I found your site earlier...that ripple issue has me slightly worried, but so far so good.
A bit off-topic question:
I've noticed that it says 680W on the label under the 12V rails, but few lines below, it also states that: "Maximum combined current for the 12V outputs shall be 50A"... so which one is correct?
But note that the 680 Watt figure is also including the 155 Watts for the 3.3V and 5V, which leaves the 12V1, 12V2, 12V3, and 12V4 combined power at 525 Watts.
But note that the 680 Watt figure is also including the 155 Watts for the 3.3V and 5V, which leaves the 12V1, 12V2, 12V3, and 12V4 combined power at 525 Watts.
It should be labeled differently if that was the case... but then again, the "labeling-scheme" they're using now isn't that great either :p
But note that the 680 Watt figure is also including the 155 Watts for the 3.3V and 5V, which leaves the 12V1, 12V2, 12V3, and 12V4 combined power at 525 Watts.
Not exactly, 680W is total combined max power of 3.3, 5 and 12V outputs, that itself doesn't limit from what voltages that can be drawn. 155W again is max combined output of 3.3 and 5V and 50A/600W is max output of 12V.
That means if 12V is fully loaded you can't draw that 155W from 3.3/5V and again if 3.3 and 5V are fully loaded you can't draw that 50A from 12V.
It can't be that hard to understand!
jonnyGURU
01-03-2007, 09:42 AM
It should be labeled differently if that was the case... but then again, the "labeling-scheme" they're using now isn't that great either :p
Haha.. Good point. So yes, the 12V rails can only do 600W. The 680W figure takes into account a load on the 3.3V and 5V rails as well.
So 18*3 = 54. Even if you don't use one of the +12V rail, you're still capable of overloading the combined 12V rails by 4A! :D
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