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Old 10-27-06, 11:48 PM   #349
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Xion X2
"12V1@18A,+12V2@18A,+12V3@18A,+12V4@18A,"

http://www.newegg.com/Product/Produc...82E16817341001

You should be fine. Quad-rail setup and nice amps on all 4. If you do purchase a GTX and have problems, try re-arranging the connectors. But you should be fine running a single GTX on that PSU.

thats not my powersupply.

Mine: http://www.ocztechnology.com/product...m_power_supply
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Old 10-27-06, 11:54 PM   #350
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Xion X2
Well I hate to break the news to you, but your PSU may not be enough. 12v1 is usually dedicated to nothing but the processor. And your 12v2 is going to be sharing the amps with your motherboard, memory, hard disks, optical drives, case fans, led's(if you have them), sound card, and your graphics card.

I have a 550W Antec TruePowerII in my X2 system right now with 19A on two 12v rails running a 7900GTX, and there's no way I'd try running a G80 on it. It's pushing it as it is.
Wouldn't a TPII-550 be just fine plugging both SLI power connectors into a G80? I don't see why not. I would think his 480 would be fine doing that... If a 450 is the requirement, error on the side of caution, I don't understand why an antec 480 or 550 of all bands would not fullfill that. I'm sure the amp numbers given are on the side of caution as well.
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Old 10-28-06, 12:03 AM   #351
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by mike686
Yes, dual rail. 18A on +12V1 and 15A on +12V2.
i think you'll be fine.
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Old 10-28-06, 12:07 AM   #352
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Roadhog
"600W: +3.3V(28A),
+5V(46A), +12V1(20A), +12V2(18A)"



That's unfortunate, because now I'd put you in the same boat as mike686. Might want to look into a new PSU. Dual-rail PSU's are horribly optimized for gaming, and the reason is because your graphics are almost always sharing resources with other devices in your computer, and with a card that's going to take up as many amps as 8800GTX will (15A+, most likely) it doesn't leave you a lot of breathing room (3-5A) on either one of those rails.
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Old 10-28-06, 12:14 AM   #353
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Xion X2
"600W: +3.3V(28A),
+5V(46A), +12V1(20A), +12V2(18A)"



That's unfortunate, because now I'd put you in the same boat as mike686. Might want to look into a new PSU. Dual-rail PSU's are horribly optimized for gaming, and the reason is because your graphics are almost always sharing resources with other devices in your computer, and with a card that's going to take up as many amps as 8800GTX will (15A+, most likely) it doesn't leave you a lot of breathing room (3-5A) on either one of those rails.

ahha, it will run one no problem, trust me.
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Old 10-28-06, 12:18 AM   #354
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by sillyeagle
Wouldn't a TPII-550 be just fine plugging both SLI power connectors into a G80? I don't see why not. I would think his 480 would be fine doing that... If a 450 is the requirement, error on the side of caution, I don't understand why an antec 480 or 550 of all bands would not fullfill that. I'm sure the amp numbers given are on the side of caution as well.
Wattage is not all that matters; you need to look at the amps on the 12v rail(s). It would depend on the rail distribution. The truth of the matter is that a lot of power-draw in regards to dual-rail PSU's is a mystery. But what I can tell you is that power-supply companies had a real brain-fart at the beginning of mass-producing all these dual-rail power-supplies. They did not take into account the increasing power-draw of components and started stacking lots of resources on the same rail as the graphics, and a lot of systems with high-end cards began to fail because of it. That's why you are now seeing triple and quad-rail PSU's becoming more popular and dual-rail PSU's phasing out. Companies are still designing single-rail PSU's, but you'd be hard-pressed to find any recent dual-rail models. That speaks volumes.

If mike686's PSU can support graphics on both 12v1 and 12v2, then he might be okay. But if his rail distribution dedicates only rail #2 for graphics, and both PCI-E connectors pull off this one rail, then I think he's going to need a new PSU. That one rail will more than likely not be entirely free; it will be sharing resources with the rest of his system.

And concerning power-draw? My GTX can reach around 9A or more under full-load, and that's not taking into account my overclock. The wattage draw on my card is somewhere in the vicinity of 110-130 watts. The specs on the 8800GTX are somewhere in the vicinity of 225W power-draw(75 to each PCI-E connector, 75 through the PCI-E mobo slot). That is around twice the power-draw of the GTX, and if you increase the amps at the same rate you are looking at anywhere from 15-18A that you will need dedicated to the card.

That's not likely to happen on a dual-rail PSU if the PCI-E's only go to one rail and it is sharing resources with other components in the system. Now some may be designed to pull from different rails with two different PCI-E connectors, and those might be fine. The other ones probably won't be.
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Last edited by Xion X2; 10-28-06 at 12:30 AM.
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Old 10-28-06, 12:21 AM   #355
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Default Re: GeForce 8800 GTX is selling?

oh, and that gamextreme psu you linked to, is actually only dual rail, its not really quad.
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Old 10-28-06, 12:25 AM   #356
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Default Re: GeForce 8800 GTX is selling?

Quote:
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oh, and that gamextreme psu you linked to, is actually only dual rail, its not really quad.
Do you even know what "quad-rail" means? Look at the specs on it:

Quote:
,+12V1@18A,+12V2@18A,+12V3@18A,+12V4@18A
It has 4 12v rails. That means it's a quad-rail PSU. That's where the term comes from; it has nothing to do with the # of PCI-E connectors.
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Old 10-28-06, 12:27 AM   #357
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Xion X2
Do you even know what "quad-rail" means? Look at the specs on it:



It has 4 12v rails. That means it's a quad-rail PSU. That's where the term comes from; it has nothing to do with the # of PCI-E connectors.

Its only dual rails, trust me.. If you ever opened up the psu and looked inside, it is clearly only dual rails.
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Old 10-28-06, 12:33 AM   #358
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Roadhog
Its only dual rails, trust me.. If you ever opened up the psu and looked inside, it is clearly only dual rails.
Do you mean that it doesn't list 4 different 12v rails on the back of the PSU? Because that would be the only way it wouldn't be considered quad-rail.

I don't think you know what you're talking about. Any PSU that has 4 12v rails is considered quad-rail. It's where the term originated. It has nothing to do with the # of wires, connectors, or anything else. It has to do with the 12v rail design. If that PSU isn't truly quad-rail and they're advertising it as such, then they could be prosecuted for it. I tend to not believe you in this case.
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Old 10-28-06, 12:36 AM   #359
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Default Re: GeForce 8800 GTX is selling?

Quote:
Originally Posted by Xion X2
Do you mean that it doesn't list 4 different 12v rails on the back of the PSU? Because that would be the only way it wouldn't be considered quad-rail.

I don't think you know what you're talking about. Any PSU that has 4 12v rails is considered quad-rail. It's where the term originated. It has nothing to do with the # of wires, connectors, or anything else. It has to do with the 12v rail design. If that PSU isn't truly quad-rail and they're advertising it as such, then they could be prosecuted for it. I tend to not believe you in this case.

I dont think you know what you are talking about, Im 90% sure it was the OCZ Gamextrem that was listed as quad rail, but is really 2 rails, split off into 2 more. I will try to find which psu it was.
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Old 10-28-06, 12:38 AM   #360
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Default Re: GeForce 8800 GTX is selling?

http://www.ocztechnology.com/product...m_power_supply

OCZ lists it as a quad-rail PSU on their website.

The GameXtreams are true quad-rail PSU's; here is a link to JonnyGuru's website where he confirms it:

Quote:
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.
http://www.jonnyguru.com/PSU/GameXStream700/
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