GF7900GTX Spec?(Update version)

[Lfctony]

Looks pretty good on paper, should the performance scale like it did with the GTX512 over the GTX, it will be a pretty decent card.

[SH64]

I still doubt 700Mhz core with 32 pixel pipes ...
i say its either low core freq with 32 pipes (like 400-450Mhz) or high core freq with 24 pipes (like 650-700Mhz).

[walterman]

"we can expect quite a huge price difference too"

"GeForce 7900 GT will be clocked at 450MHz core / 1.32GHz memory"

I think that this GT could be a very good overclocker.

24 pipes overclocked to 650MHz, and with a price between the 7800GT&GTX. It would be the best price/performance card with some overclocking.

[Zeta]

Is Mike posting this on the front page confirmation of the release date?:bounce:

[Redeemed]

I still doubt 700Mhz core with 32 pixel pipes ...
i say its either low core freq with 32 pipes (like 400-450Mhz) or high core freq with 24 pipes (like 650-700Mhz).


Well, if they did that it wouldn't be much faster than a 512MB GTX. Why would they even bother then? If what you're saying is true it'd make more sense for them to just release more 512MB GTXs. I'm banking on higher clock and memory speeds with 32 pipes. We must remember- this IS on 90nm so higher clocks speeds ARE a possibility.

[CaptNKILL]

Well, if they did that it wouldn't be much faster than a 512MB GTX. Why would they even bother then? If what you're saying is true it'd make more sense for them to just release more 512MB GTXs. I'm banking on higher clock and memory speeds with 32 pipes. We must remember- this IS on 90nm so higher clocks speeds ARE a possibility.
I think the 512Mb GTXs are waaay too expensive to produce, for one reason or another. A cheaper replacement that performs identically would be sweet. I mean, if they could sell a card that performs the same as a 512MB GTX for $500 or less, thatl be great. Im hoping the GT is in that performance range, but Im not going to be surprised if its closer to the 256Mb GTX.

[SH64]

Well, if they did that it wouldn't be much faster than a 512MB GTX. Why would they even bother then?

Well one possibility is to replace the "hard to find" 7800GTX 512MB with an even faster version ... thats of course besides the main objective which is to match or beat the XTX.

EDIT : ditto Capt :)

[jAkUp]

Yea, nVidia doesn't want to lose the performance crown intill fall, (G80)

[bkswaney]

My 2 cents is...........

The 7900GTX will be a 24 pipe card with super high clocks.
The G80 will be a 32 pipe card.

I do think the 7900 will beat the XTX.
Nvidia will tweak quiet a bit plus up the clocks.

[Dazz]

0.9u TSMC Fabrication Process (Low-K?)
- 700Mhz Core
- 1650Mhz Memory GDDR-3 (Samsung 1.0ns)
- 8 Geometry Processors
- Pixel & Vertex Shader Model – 3.0
- 32 Pixel Pipelines/ Shader Processors
- HDR Blending with FP16, Int16 & Int10 Formats
- 32 TMUs (Bi/tri/Aniso ‘Full Speed’) SIMD
- 16 ROPs (two Z Operations) MSAA+HDR, Multiple Render Targets
- 2x/4x/8x/16x AF Modes
- Pure Video

That looks a bit more realistic.
As the name is states it's an updated G70 core as such HDR+FSAA is out of the question that is a fact, the G80 on the other hand will support it. 32 pipelines and 700MHz core doesn't really seem realistic to tell you the TBH. I think it will be 24 pipes @ 650+MHz 1700MHz memory clock. The GTX512 is limited due to high transister count due to high clock speed and the 24pipes. Even a die shrik to 0.90nm 32pipes and 700MHz will put the tranister count through the roof make it a big chip and yields would be very low lower then the current GTX512 which is hard enough to find. As it stands the GTX512 is a marketing gimick from most sites as it can't even fufil the demand for the card dispite the huge price. As this has hurt NV for avibility i can see the 7900GTX being slightly has but better yields so more chips on the market and a lower price point.

[agentkay]

Lets say the 7900GTX goes against the 1900XTX and the 7900GT against the 1900XT.

If the clocks of the GT are correct (450mhz), there is no way this card could beat the XT with unchanged 24 pipes, unless its a crazy overclocker and can easielly be overclocked 200mhz on the core. Even in that case, most benchmarks are run at stock clocks, like 95% of all benchmarks, except if they test factory OCed cards. The XT should still beat the GT in shader heavy games, even if it was OCed to 650mhz.

To the GTX, where the case is similar. If it has again 24 unchanged pipes, it would beat the XTX in most benchmarks at 650mhz, but surely not in shader-heavy ones and upcoming games. I think it needs at least 700-750mhz to beat it by a decent margin AND neutralize the feature disadvantage to some degree.

[FraGTastiK]

AMD ZONE also believes that 7900GTX will be a 32 pipe card, they do not sound like they are doing a guess work here or drawing conclusions off the rumors floating around, maybe they have insider info on that.

If that turns out to be true a 32 Pipe 7900GTX @ 700-750 Mhz core clock will have no hard time beating the XTX.

http://www.amdzone.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=238&page=1

In addition to this, Nvidia will also be bumping up the number of pipelines. While the GeForce 7800 GTX featured 24 pipelines, this number will increase to 32 with the GeForce 7900 ...


We'll see, CeBit is drawing near.

[killahsin]

Yeah I agree. Granted I have only seen HDR in half life 2, it is the total opposite of being realistic. Often times you see orange dirt and a solid white colored sky, and in many cases it makes it harder to see the enemy. It's only purpose is if maybe you like to handicap yourself.


orange dirt on solid white sky is a mappers issue not an hdr issue. Thats not really the subject though.

Bksweeney i don't think a g80 at 32 pipes could compete with what ati has coming next. So therefore I have to only assume based on the current scaling of games like fear and newer games coming out that 32 is very much needed right now for 'high end' gaming. So to me thats where nvidia is going. Anything under 32 would be foolish, as within a few months benchmarks will show it being creamed, by a card that came out months before it. White ati's newest selection may be texture bottlenecked, its not shader bottlenecked. and the future games this year are very very shader intensive. I expect this card to be 32, and the g80 to be 48.

[walterman]

If ATI managed to put 3 times more PS units, why nvidia shouldn't be able to put 32 pipes instead of 24 ? It's all about the number of gates that you can put in the chip.

Anyway, i think that this G71 is just a try to return the performane crown to nvidia.

I wouldn't waste 800$ in a G71 when DirectX 10 is so close. Perhaps, a 7900 GT would be a nice card while you wait for DX10, if it's cheap enough, & if you really need a card for your system.

June 2005 G70, October 2005 x1800, November 2005 GTX512, January 2006 x1900, March 2006 G71, ... Isn't this nuts for the buyer ?

I really loved my 6800U cause it lasted 1 full year without any other new card. But now, 3 months ??? This sucks !

[LBJM]

I think one of things people should also be looking towards is not just higher clocks and pipes lines but also less power usage like how the 78xxx series using less power than the 68xxx series cards.

[Mr_LoL]

As the name is states it's an updated G70 core as such HDR+FSAA is out of the question that is a fact, the G80 on the other hand will support it. 32 pipelines and 700MHz core doesn't really seem realistic to tell you the TBH. I think it will be 24 pipes @ 650+MHz 1700MHz memory clock. The GTX512 is limited due to high transister count due to high clock speed and the 24pipes. Even a die shrik to 0.90nm 32pipes and 700MHz will put the tranister count through the roof make it a big chip and yields would be very low lower then the current GTX512 which is hard enough to find. As it stands the GTX512 is a marketing gimick from most sites as it can't even fufil the demand for the card dispite the huge price. As this has hurt NV for avibility i can see the 7900GTX being slightly has but better yields so more chips on the market and a lower price point.

So what you are trying to say is that the g71 is just a g70 with an extra 100mhz clockspeed and built on a 90nm process? I doubt that as I cant see that being much faster than the 512mb GTX. I think it is going to be a 32 pipe card. As for HDR+FSAA you are probably right it would not be supported till the G80.

[jAkUp]

I think one of things people should also be looking towards is not just higher clocks and pipes lines but also less power usage like how the 78xxx series using less power than the 68xxx series cards.

Yea but we like powah :D Because of the lower die size, it should use considerably lower amount of power unless they went insane on the clockspeeds :)

[LBJM]

Yea but we like powah :D Because of the lower die size, it should use considerably lower amount of power unless they went insane on the clockspeeds :)

even more so when i go from 2 7800 gtx to one 7900 gtx 512MB lol.

[technoid]

Yea but we like powah :D Because of the lower die size, it should use considerably lower amount of power unless they went insane on the clockspeeds :)
But it never works out like that. When they go to a thinner process they always up the transistor count or clock speed and usually both, so the power savings moving to the thinner process is lost. They end up using more power because of the added transistors and clock speed.

[Marvel_us]

According to Inquirer's new article there's no 32pipe G71. It's merely a 24pipe card at 650/800mhz.

http://theinquirer.net/?article=29795

That doesn't look like it'll be enough to beat R580. I'm still holding off to make my decision though.

[J-Mag]

As the name is states it's an updated G70 core as such HDR+FSAA is out of the question that is a fact, the G80 on the other hand will support it.


There are different methods for rendering AA and HDR at the same time. Last time I checked I have a G70 and AA + HDR works fine with Lost Coast.


Even a die shrik to 0.90nm 32pipes and 700MHz will put the tranister count through the roof make it a big chip and yields would be very low lower then the current GTX512 which is hard enough to find.


If I understand things correctly going from 110nm to 90nm will give approximately 1.5 times the number of transistors in the same die size. Even if one were to assume that all transistors were associated with the "pipes", I am only seeing a 25% increase in transistor count.


As it stands the GTX512 is a marketing gimick from most sites as it can't even fufil the demand for the card dispite the huge price. As this has hurt NV for avibility i can see the 7900GTX being slightly has but better yields so more chips on the market and a lower price point.

BTW, did you post drunk or did you pet monkey get loose?

[walterman]

If I understand things correctly going from 110nm to 90nm will give approximately 1.5 times the number of transistors in the same die size. Even if one were to assume that all transistors were associated with the "pipes", I am only seeing a 25% increase in transistor count.

If ATi managed to put 3 times more ALUs in the R580, then, why nvidia shouldn't be able to increase pixel pipes from 24 to 32 ?

G70 has around 300M, so, 300M/24 pipes = 12.5M per pipe -> 12.5M * 32 pipes = 400M max (of course, the chip hasn't only pipes, for example: VS units, 2D video acceleration, ...). ATI's R580 has 380M & R520 has 320M. A difference of 60M for 3 times more ALUs.

Another thing is the die size. Perhaps nvidia can put 32 pipes, but perhaps they would prefer to keep it 'small' for better yields & higher clock speeds. It will mean faster & cheaper cards for us.

[Maverickman]

I liked the $499 price point for the 7900GTX. Although the reported specs will not allow Nvidia to take beack the performance crown in the near future, the price of the card will be very appealing. It's at least $150 less than the X1900XTX. You'll get slower performance, but it shouldn't be that big of a gap between the two. Nvidia led in the performance war for a while, now it's ATIs turn again. Things will definitely change when G80 hits later this year.

[LBJM]

According to Inquirer's new article there's no 32pipe G71. It's merely a 24pipe card at 650/800mhz.

http://theinquirer.net/?article=29795

That doesn't look like it'll be enough to beat R580. I'm still holding off to make my decision though.

well here's to hoping they're wrong... most of the time they are not though... if the card does not beat dual 7800 gtx's I will not buy it.

[Tikiman44]

I'm hoping that this true. http://www.hexus.net/content/item.php?item=4343&search=g71


(nana2)