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G80 specs finally confirmed! NOT old news!

i am sure i can see a fly in thr referance , that they missed , they should send me the game and hardware for testing i can see what else they missed! :p ;)
 
Originally Posted by Flanno
What will be a problem for G80 SLI is rails. These gpu's suck a lot of amps from the 12v rail and in some psu's (Silverstone, Antec etc..) this causes OCP (over current protection) to activate in accordance with Intels ATX12V standard on no rail over 240va. Effectively even though your brand spanking new Enermax might have 4 rails, 18amps per rail may not cut it on a GPU like the 8800GTX which will suck power off one rail only. Or if you have a PSU where your don't know what rail is for what peripheral (12v1 for cpu, 12v2 for gpu) you could be in trouble too. This may not be an issue with the Seasonic M12 700w though. Even though it is listed as having 4 x 12v rails, this is a labelling error. Seasonic got permission from Intel to break the 240VA limit and made one big massive rail. Something like 72A. Very nice. We should see more PSU makers doing this as Intel have now unofficially relaxed this part of the ATX standard.

Yes my enermax 485 is 18A per rail but it got a low max of 20A for the pair wjen i got it 18 months ago i didnot know about the low max i only looked at the rails at 18A but i will next one i buy (it the same max as the 370 and that only got 12A on each rail)
 
queamin said:
Yes my enermax 485 is 18A per rail but it got a low max of 20A for the pair wjen i got it 18 months ago i didnot know about the low max i only looked at the rails at 18A but i will next one i buy (it the same max as the 370 and that only got 12A on each rail)
Is it the Noisetaker EG495AX? How do you mean low? The combined 12v output looks quite good.
 
Flanno said:
The seasonic M12 700w I have comes with 4 pci-e connectors also. Qualified for quad sli too. So does the Enermax Galaxy (I think).

Ah, my bad. I didn't notice the Seasonic at all and I some how got into my head that the Enermax had 3 pci-e :p I think i'll get the Enermax, looks like a safe option (plus the 'piano black' finish matches my case :D )
 
fornowagain said:
Is it the Noisetaker EG495AX? How do you mean low? The combined 12v output looks quite good.

Combined 12v output means nothing if your rails are all split up and if a G80 is going to try to pull 22amps off a rail that does 18a for example, you are out of luck. Some psu manufacturers even go so far to say what rails are for what, so you can hook your gpu up to the strongest rail (ocz, antec etc..). With others it's a crapshoot. That's why I think 1 strong rail is best for gpu's and overclocking, while separate rails are best for lots of devices where a lot of interference can occur.
 
AWBbox said:
Ah, my bad. I didn't notice the Seasonic at all and I some how got into my head that the Enermax had 3 pci-e :p I think i'll get the Enermax, looks like a safe option (plus the 'piano black' finish matches my case :D )

If you can fit it in your case. Won't work in my Akasa as the psu cage blocks half the huge fan.
 
Flanno said:
Combined 12v output means nothing if your rails are all split up and if a G80 is going to try to pull 22amps off a rail that does 18a for example, you are out of luck. Some psu manufacturers even go so far to say what rails are for what, so you can hook your gpu up to the strongest rail (ocz, antec etc..). With others it's a crapshoot. That's why I think 1 strong rail is best for gpu's and overclocking, while separate rails are best for lots of devices where a lot of interference can occur.
If its two rails (same primary source), you cross load it, nothing new in that. The ATX spec and 240VA overcurrent has been a pain for ages, lots of manufacturers ignored it, or you could say "applied it". Most current limiters trip higher than stated anyway, its all BS, has been for awhile. The G80 will need two PCI-e connecters, for PCI-e version 1 thats 18A/225w maximum, no more. With a multirail PSU, the PCI-e's will pull the feed from two rails e.g 12V3&12V4 so not a problem.

e.g.
Silverstone ST60F:

+12V1(13A) : CPU1
+12V2(18A) : CPU2+SATA
+12V3(16A) : MB+VGA1
+12V4(18A) : HDD+VGA2

With that 12A/150w from 12v3 and 75w from 12v4

Posted this months ago, same thing.
http://www.extremetech.com/article2/0,1697,1932947,00.asp
 
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Flanno said:
Assuming you can crossload from another rail. Don't ocz psu's prevent that though ?
Problems occur with different voltage crossloads. No reason not to with the same source. Personally I much prefer single rail, one of my favourite OCZ's was a single rail.

This is a good read on the subject http://forums.silentpcreview.com/viewtopic.php?t=23916
 
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Cheers mate. Thanks.

If I go SLI G80 *depending on price* am hoping the 700w Seasonic will be enough. We should be hearing tommorrow as I belive the Editors Nvidia day was today. If not enough, there is always my Thermaltake psu which fits in a 5.25" bay and should drive 1xG80.
 
Flanno said:
Cheers mate. Thanks.

If I go SLI G80 *depending on price* am hoping the 700w Seasonic will be enough. We should be hearing tommorrow as I belive the Editors Nvidia day was today. If not enough, there is always my Thermaltake psu which fits in a 5.25" bay and should drive 1xG80.
I don't think you will have any problem, it'll eat it m8. I'd bet my 500w PCP&C will handle it. It will knock out a few borderline PSU's though. Expect dozens of "my 8800GTX won't post" threads coming shortly.

Now SLi G80, that's another story...


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8th :D

http://tomshardware.co.uk/2006/10/18/nvidia_8800/
November will be one busy month for gadget lovers and gaming enthusiasts. Add to the introduction of the Nintendo Wii, the Playstation 3, Microsoft's Xbox 360 HD DVD drive, Intel's quad-core processor and (likely) AMD's 4x4 platform as well as Microsoft's Zune audio player, Nvidia's new generation gaming card.

Nvidia today sent out invitations for the introduction of the "definitive gaming platform" on 8 November in San Jose, Calif. Industry sources suggest that the company will introduce two versions of the 8800 - a GTX and GTS version, as well as new chipsets (nForce 650, 680). The flagship reportedly will run at a core clock of 575 MHz, integrate 768 MB of 900 MHz GDDR3 memory, and include 128 shader units.
 
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wonder what G80 and R600 do for C2D performance, im assuming it'll be off the scale, stellar performance, since its totally held back by graphics cards at any reasonable resolution :)
 
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