Chiphell RV770 rumour?

[Iconyu]

http://www.yougamers.com/forum/showthread.php?t=76368

Anyone got any insight about this one?

The previous numbers posted by couple sites said 480 SPs, 32 TMUs, over 1GHz clock and GDDR5 memories.

According to chiphell, however, RV770 in fact features 640 SPs and 32 TMUs, and clocked higher than RV670 but not over 1GHZ. They also report the memories being GDDR5.

Also, according to them A11 (first revision) of the chip was taped out recently, and it's apparently in production with fairly good yields, over 71%, and there's no reports of A12 revision needed.

Edit: If this doesn't class as news, due to it's questioning format, please feel free to move post.

[Craftyman.]

They also report the memories being GDDR5.

Yesssssssssss.

[xlink]

let see before:
50% increase in SPs
100% increase in TMUs

now:
100% increase in SPs
100% increase in TMUs


so they doubled the chip basically.

sounds like GeForce 6 to GeForce 7, frequency upscaling is close around 15-20%ish higher, basic doubling of chip components...

sounds like a nice leap.

[HKPolice]

all lies.

Those fan boys really are fulla ****

[Nedjo]

part about high yield from initial silicon sounds promising

[Eastcoasthandle]

Wait a minute is this nothing more then another X2 or is this a single GPU solution???

[Craftyman.]

let see before:
50% increase in SPs
100% increase in TMUs

now:
100% increase in SPs
100% increase in TMUs


so they doubled the chip basically.

sounds like GeForce 6 to GeForce 7, frequency upscaling is close around 15-20%ish higher, basic doubling of chip components...

sounds like a nice leap.

Yep, I agree . Needs an increase in ROPs though

[xlink]

Yep, I agree . Needs an increase in ROPs though

they said nothing of ROPs...

lets assume that their engineers can figure it out on their own... I'd hope that they could

[Iconyu]

Wait a minute is this nothing more then another X2 or is this a single GPU solution???

RV770 is the single chip card, ATI are supposed to be using two of the for the R700 as far as I know. But as this chip was designed with that in mind, I guess there will be couple fewer issues with games only running on one of the two cores than we see presently.

[STaRGaZeR]

Yesssssssssss.

You should focus on SP numbers more than memory bandwidth. R600 architecture (and the rumours say RV770 is a R600 derivative after all) is not limited by bandwidth.

I hope these rumours are true, BTW even at 55nm that should be a huge chip with all the components doubled

[largon]

I'd be interested how they supposedly doubled the chip without going insane with the die size...

Anyways, ATi R6 GPUs don't really need more render back-end (= ROP) muscle, only TMUs and SPs. And in that order.

[STaRGaZeR]

I've just seen it. 250mm^2 of RV770 vs 190mm^2 of RV670.

[[XC] gomeler]

MMMM Hot stuff. I want two of these, badly. My RV670's just don't scale high enough

[Papu]

all lies.

Those fan boys really are fulla ****

what an insightful and helpful comment.

[Craftyman.]

You should focus on SP numbers more than memory bandwidth. R600 architecture (and the rumours say RV770 is a R600 derivative after all) is not limited by bandwidth.

I hope these rumours are true, BTW even at 55nm that should be a huge chip with all the components doubled

Hmm, interesting. regardless its nice to see technology move forward, right?

[STaRGaZeR]

Of course, faster memory means we need smaller memory buses (and cheaper) to achieve the same final bandwidth. But the main thing here is the increase in TMUs and SP numbers, and the possible return of hardware AA. Can't wait to see the chip in action, honestly I'm done with all these rumours and FUD everywhere about everything.

[metro.cl]

On VR-Zone they dont say anything about more ROPs, TMUs, or else

I kinda trust VR-Zone more for the translation.

[Craftyman.]

Of course, faster memory means we need smaller memory buses (and cheaper) to achieve the same final bandwidth. But the main thing here is the increase in TMUs and SP numbers, and the possible return of hardware AA. Can't wait to see the chip in action, honestly I'm done with all these rumours and FUD everywhere about everything.

QFT, how's about they release this thing so I can start shelling out cash

[LordEC911]

I hope these rumours are true, BTW even at 55nm that should be a huge chip with all the components doubled

Should be roughly the same size as G92, especially since they won't need two UVDs, single UVD is 3.3mm2, and they won't need to double the MC.

I'd be interested how they supposedly doubled the chip without going insane with the die size...

Would be more interested in the trannie count than the die size.

Anyways, ATi R6 GPUs don't really need more render back-end (= ROP) muscle, only TMUs and SPs. And in that order.

Agreed, as long as the tweak the sampling.

I've just seen it. 250mm^2 of RV770 vs 190mm^2 of RV670.

Sarcasm?
I'll be guessing around 300-350mm2 if still on 55nm.

Of course, faster memory means we need smaller memory buses (and cheaper) to achieve the same final bandwidth. But the main thing here is the increase in TMUs and SP numbers, and the possible return of hardware AA. Can't wait to see the chip in action, honestly I'm done with all these rumours and FUD everywhere about everything.

Highly doubt AMD would switch back to hardware AA, especially since that isn't where the industry seems to be headed.

[STaRGaZeR]

Sarcasm?
I'll be guessing around 300-350mm2 if still on 55nm.

Have you actually read the linked article?

Final specification of RV770.
The core frequency of RV770 is a little higher than RV670, but not over 1GHZ. The ram used by RV770 is GDDR5, and the core size is 250 mm2. The stepping A11 GPU's yield is over 71% when recently taped out. And the stepping provided to retail will be the same A11 stepping. Whether stepping A12 will be provided is not known yet. The detail specification of RV770 is just more than two times SP number and TMU number of RV670. The release date of RV770 will be some day in May.

Highly doubt AMD would switch back to hardware AA, especially since that isn't where the industry seems to be headed.

Me too, I was just pointing out the possibility, as BrowncoatGR said here.

[LordEC911]

Have you actually read the linked article?

Yes but not before I posted.
Just the way you said, "I have just seen it."
I'm still trying to figure out why ChipHell is using that mockup of a RV670 card as if it were RV770...

Me too, I was just pointing out the possibility, as BrowncoatGR said here.

That's what I was gonna ask, if he had a link to that interview which I think I have already asked before.

[STaRGaZeR]

I don't now, but Chiphell seems to be a very reliable source for news like this one. If it's indeed true, 250mm^2 is pretty small with all these doubled stuff. But still, is an unconfirmed rumour until AMD release the final specs. We are always waiting for something

[JaD]

You should focus on SP numbers more than memory bandwidth. R600 architecture (and the rumours say RV770 is a R600 derivative after all) is not limited by bandwidth.

There's no way you can tell actually.

R600 being not bandwidth hungry doesn't mean it will be the same for a chip with twice the SPs/ROPs, even if it shares the same architecture.

In fact, it could easily be the opposite: you need memory bandwidth as long as the GPU is able to compute it. For R600, 70GB/s may be enough; by (theoretically) doubling processing power, you might need to feed way more data in order to take advantage of that power.

[OBR]

it is bull***, ATi cant to compete next Nvidias high-end and this is funeral march full of dreams ...

[xlink]

There's no way you can tell actually.

R600 being not bandwidth hungry doesn't mean it will be the same for a chip with twice the SPs/ROPs, even if it shares the same architecture.

In fact, it could easily be the opposite: you need memory bandwidth as long as the GPU is able to compute it. For R600, 70GB/s may be enough; by (theoretically) doubling processing power, you might need to feed way more data in order to take advantage of that power.

they said gDDR5...
think 160GB/s on a 256bit bus.
that's plenty.