The official GT300/Fermi Thread

[LordEC911]

Those are all guesses. Full spec and speed should very well be possible if TDP is similar to the GTX285 (which it should be).

6+ months is not going to be the case IMO. There will be no need for a shrink if TDP is similar to the 285.

Ummm... so GTX295 is two full spec'ed GTX285s? That is news to me...
Yes, my post was guesses and speculation but no less than your posts.

[Solus Corvus]

I'm not convinced. We'll all find out when it's released though.

If it was just a doubling of resources without major architecture changes then I would say that the average performance would would be LESS then 2x the previous gen. You can't expect linear scaling.

But I'm taking into account that there are architecture changes. Most of the changes don't sound like they would make much, if any, performance difference in games. But perhaps the efficiency improvements will help make the most of the resources available. But without major changes to the shaders and arch I don't see how you'd get more then 2.13x scaling, except in corner cases.

Nvidia has already indicated that there will be a dual GPU version of the GT300.

Any timeframe? Will it launch with/near the other cards, or will we have to wait for a shrink like the 295?

Number of transistors is not what determines heat output, that would be the TDP, which will be similar to the GTX285, so that really won't be much of an issue. Nvidia won't let that happen, and based on performance of the 5870, and knowing the specs of GT300, I believe it is pretty clear the 380 will be faster, which nvidia has already confirmed.

You know what I mean, of course 10 billion 1 mhz transistors wouldn't be very hard to cool.

A TDP near the GTX285 would be very much of an issue. How many NV cards are on the market with 2 full speed, not cut down GTX285 cores, even now? 1000? To make the standard 295 they had to cut the number of shaders and the speed. To make the 395 they will probably have to make even deeper cuts to be able to fit it in the power/TDP envelope.

Nvidia didn't confirm anything, they said they "believe" it will be faster in games. And I'm not going to take their word for it, benchmarks will tell us the truth.

I expect the performance to be MORE than two 285 in high-res 8xAA.

Why?

[DeathReborn]

You know what I mean, of course 10 billion 1 mhz transistors wouldn't be very hard to cool.

A TDP near the GTX285 would be very much of an issue. How many NV cards are on the market with 2 full speed, not cut down GTX285 cores, even now? 1000? To make the standard 295 they had to cut the number of shaders and the speed. To make the 395 they will probably have to make even deeper cuts to be able to fit it in the power/TDP envelope.

Whackypedia has you not far off the transistor count...

The initial model in the series to be released will use the GT300 chip, a very large chip that is heavily modified of G92 GPU(Up to nine billion transistors in quad core version) manufactured by TSMC in a 55-nanometer process. Versions will be available with 1.5GB, 3GB or 6GB of memory, attached to six separate 64-bit GDDR4 memory controllers on the chip.

Also the GTX295 only had lowered clocks & 448bit Memory Bus instead of 512bit. It has the full 240 shaders on each chip.

[Solus Corvus]

Also the GTX295 only had lowered clocks & 448bit Memory Bus instead of 512bit. It has the full 240 shaders on each chip.

Yeah, actually that's correct. Though they did have to wait for the shrink before they could do it. And even now only the MARS has full speed cores.

[570091D]

~2x as fast is the BEST case scenario. Shaders are being doubled but completely overhauled which should bring IPC but not necessarily.
Also there are many other parts of GF100 that could possibly bottleneck the architecture.

i would like to know which of the listed features will bottleneck this gpu.

Eventually, yes.
Full spec'ed and full speed? No.
6months after release? Maybe, most likely longer.
32/28nm shrink needed? Possibly.

http://www.fudzilla.com/content/view/15758/34/

i know it's fud, and i'm looking for corroborating sources, but they're stating a full range release (even the 2 gpu version). when/if i find anyone else with the same info, i'll share it.

[LordEC911]

i would like to know which of the listed features will bottleneck this gpu.

ROP throughput?
Also performance is dependent on clockspeeds, which is very underwhelming at the moment.

[003]

Ummm... so GTX295 is two full spec'ed GTX285s? That is news to me...
Yes, my post was guesses and speculation but no less than your posts.

1. The GTX295 is not two full spec 285s, but it still is the fastest single card.

2. Full spec dual 285 on a single card is perfectly possible. Look at the Asus Mars. Not only is it full spec, but it actually has 2GB of memory per GPU for a total of 4GB of DRAM chips. Evga was also working on a dual 285 card, but I'm not sure if they will release it with GT300 right around the corner.

[Solus Corvus]

1. The GTX295 is not two full spec 285s, but it still is the fastest single card.

2. Full spec dual 285 on a single card is perfectly possible. Look at the Asus Mars. Not only is it full spec, but it actually has 2GB of memory per GPU for a total of 4GB of DRAM chips. Evga was also working on a dual 285 card, but I'm not sure if they will release it with GT300 right around the corner.

"Look at the Asus MARS and Evga's possibly aborted project" aren't really good arguments for the likelihood of a full speed GT300, lol.