G80 De-Mystified; GeForce 8800GTX/GT

Printable View

Show 100 post(s) from this thread on one page

10-02-2006, 12:21 PM
Helmore

Quote:

Originally Posted by Dublin_Gunner

Once there's sufficient current on that rail, I dont see how that would become a problem.

I still fail to see why they would need 2.

The only reason for 2 connectors is because the specs don't allow you to draw more then 75W from a single connector, but I'm sure that you can draw 150+W from a single connector without any problems.
10-02-2006, 12:42 PM
Starscream

Quote:

Originally Posted by ***Deimos***

sometimes hard to tell if you are joking.
but, I suppose if a company like Bungie updated Halo, then Dice can update BF2 too ((HL1 source also comes to mind). Get it all Vista "compatible" and showcase those dark sily smooth shadows.. oh yeah baby.

EDIT: its very well possible... I didn't say they WILL do it.

me asking if ur kidding is cause you say: bungie updating halo.
were did they update the upcoming Halo 2 for Vista.
the screenshots seen sofar look exactly like what it looked like a few years ago on the xbox. It hasnt been updated in anyway.

edit:
if ur updating is refered to directx or whatever.
dunno what Dx version Halo2 is/was but Vista will simply emulate it.
10-02-2006, 06:29 PM
guess2098

just touch a died 8800GTX and 8800GT

the 8800GTX is crazy long. about 1.5inch longer than 7950GX2
i am 100% sure it is using GDDR3 1.1ns!
very nice card and fan is better than 6800Ultra!!

but it dead!!!!! lol
10-02-2006, 06:57 PM
vapb400

gddr3? interesting
10-02-2006, 08:10 PM
theteamaqua

im thinking of getting X1900 or X1950 crossfire when G80- comes out, they better make it so i can do it in less than $600 heh
10-02-2006, 08:37 PM
***Deimos***

Quote:

Originally Posted by Starscream

me asking if ur kidding is cause you say: bungie updating halo.
were did they update the upcoming Halo 2 for Vista.
the screenshots seen sofar look exactly like what it looked like a few years ago on the xbox. It hasnt been updated in anyway.

edit:
if ur updating is refered to directx or whatever.
dunno what Dx version Halo2 is/was but Vista will simply emulate it.

Bungie updated Halo for PC. I didn't say any more. I dont know why you insist that I prove something about Halo2 and Vista.. how did you come up with that?

Just saying, that sometimes, rarely, games DO get updated. Not always. Not always for Vista. Maybe not all Halo games. Please dont misunderstand.

Quote:

Originally Posted by Helmore

The only reason for 2 connectors is because the specs don't allow you to draw more then 75W from a single connector, but I'm sure that you can draw 150+W from a single connector without any problems.

Quite frankly, I'm not up to date on PCIE.. their website requries registration to view the whitepapers and data sheets... however, I recall about the same values.. 75W from PCIE slot,and 75W from PCIE power connector. Also other websites state 150W from PCIE total.

As for the 6 pin connector, I think it only supplies two 12V lines... so for 150W, that would be 12.5A.. 6.25A per cable pair. That is a LOT. Perhaps not impossible. But, certainly would affect stability. (note: there is 2 molex to 1 PCIE Y connector)

From what I recall, X800XTPE uses up to about 3A from 12A on power connector. An overclocked 6800Ulltra uses 4.5A and even 5A. But, it has two power connectors.

I think there are some good reasons/explanations to use two power connectors on G80:
1. Multiple voltage regulators and buck converters like on 6800Ultra. A connector/voltage regulator.
2. Power supplies now feature multiple rails.. this way you can draw power from both and not overburden any single one.
3. More even power distribution, less signal noise, and higher stability.
4. Scare the competition!?
11-11-2006, 05:33 PM
***Deimos***

Quote:
Originally Posted by guess2098
using up to 250W!!! full load for GTX ( single)
the water cooling G80 is going to cost around 900$ OMG!!)(not sure but it is what they are talking about today)

for GT is about 180W !!??

short supply for G80
using GDDR3???

Quote:
Originally Posted by ***Deimos***:
I think you're completely wrong... I'm so sure, that I'm willing to bet that if I lose I'll post photo of me in panties.

no pink panties for you
* it turns out in many games GTX uses about the same power as X1900XX/X1950XTX. And even in most power demanding situations hits 142-149W (depending on website review).
* G80 doesn't REQUIRE water cooling, let alone $900 worth, and uses a quite conventional heatsink.
* The GT in many cases uses less power than XTX, far far from 180W.
* short supply, reason why GDD3... only time will tell.

FYI: I find it very interesting which of my guesstimates were right/wrong.
80nm=NO. ~7900GT OC clocks at 1.25-1.3V to compensate for complexity=YES, 125-150W=YES, water cooler not required=YES, presumed still using vector units and hence 1.35Ghz ridiculous = DEAD WRONG... even though expecting the unimaginable, nVidia shocked even me... they really went all out!
11-12-2006, 07:08 AM
Dublin_Gunner

Quote:

Originally Posted by ***Deimos***

I think there are some good reasons/explanations to use two power connectors on G80:
1. Multiple voltage regulators and buck converters like on 6800Ultra. A connector/voltage regulator.
2. Power supplies now feature multiple rails.. this way you can draw power from both and not overburden any single one.
3. More even power distribution, less signal noise, and higher stability.
4. Scare the competition!?

Actually, the reason is quite simple.

PCI-E spec allows for 75w per 16x slot, and 75W per power connector.
= 150W max for 1 power connector, but 8800gtx needs closer to 180W or so I believe, hence the need for the second PCI-E power connector, for a total max wattage of 225W
11-12-2006, 08:07 AM
***Deimos***

some sites are reporting:

8800GT = 3 phase power
8800GTX = 4 phase power

Show 100 post(s) from this thread on one page