Leaked ATI S.I. 6870 benchmark

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bryanW1995

Lifer
May 22, 2007
11,144
32
91
amd has deliberately given information to their board partners to test and see who is leaking and who is airtight. some of the leaked info might or might not be true. the current rumor is that barts xt was going to be released as 6770 but was fast enough to be rebadged as 6870, so amd bumped up cayman xt to 6970 and cayman xt x2 as 6990. would likely be first rebadge in vc&g history that actually occurred before actual launch.
 

HurleyBird

Platinum Member
Apr 22, 2003
2,759
1,455
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because supposedly thats not possible. there has never been a gpu with 5 64 bit controllers so there must be a reason why. same reason there has never been a gpu with 3 or 7 64bit controllers either. the 448, 320 and 192 bit cards all had one 64 bit controller disabled.

GF106 has a native 192-bit bus.


Heh.

http://techreport.com/articles.x/19619

If you look closely at the diagram above, you'll notice that the GF106 bucks expectations for a mid-range graphics chip in a couple of notable ways. Rather than the expected pair of 64-bit GDDR5 memory interfaces, the GF106 has a trio.
 

HurleyBird

Platinum Member
Apr 22, 2003
2,759
1,455
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I only said that in jest but hopefully it won't be 320bit so I will not have to feel obligated in any way. lol :sneaky:

How about we split the different and if it is you can buy me a GTs450 for PhysX?

I do agree though, chances are very small that 5870 diverts from the engineering samples we've seen.
 

Grooveriding

Diamond Member
Dec 25, 2008
9,110
1,260
126
amd has deliberately given information to their board partners to test and see who is leaking and who is airtight. some of the leaked info might or might not be true. the current rumor is that barts xt was going to be released as 6770 but was fast enough to be rebadged as 6870, so amd bumped up cayman xt to 6970 and cayman xt x2 as 6990. would likely be first rebadge in vc&g history that actually occurred before actual launch.

So is the inference supposed to be that 6770 is as fast or close to a current 5870 ?

If they sell a card with 5870 performance for $200-$250 that will be something to see. They'll sell out as fast as they come in stock like the 5850s and 5870s were when they were released.
 

Timorous

Golden Member
Oct 27, 2008
1,748
3,239
136
amd has deliberately given information to their board partners to test and see who is leaking and who is airtight. some of the leaked info might or might not be true. the current rumor is that barts xt was going to be released as 6770 but was fast enough to be rebadged as 6870, so amd bumped up cayman xt to 6970 and cayman xt x2 as 6990. would likely be first rebadge in vc&g history that actually occurred before actual launch.

I still do not see it happening that way.

Juniper is 166mm^2, If barts is ~15% bigger that makes it 191mm^2, that rumour is saying that on the same process node a 191mm^2 die is 30%* faster than a die that is 334mm^2. I just find that a bit optimistic, if they have managed it though it is a fantastic feat of engineering and it really puts Nvidia in trouble for the forseable future.

**my estimate at how much faster as a minimum the 6870 would have to be vs the 5870
 
Feb 19, 2009
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I still do not see it happening that way.

Juniper is 166mm^2, If barts is ~15% bigger that makes it 191mm^2, that rumour is saying that on the same process node a 191mm^2 die is 30%* faster than a die that is 334mm^2. I just find that a bit optimistic, if they have managed it though it is a fantastic feat of engineering and it really puts Nvidia in trouble for the forseable future.

**my estimate at how much faster as a minimum the 6870 would have to be vs the 5870

Cayman is ~15% bigger than Cypress.

Barts is 2/3 of a Cayman, Not 1/2. In dx11 games that makes use of tessellation, Barts will >= 5870. Otherwise the perf target is 5850, which is still pretty good considering its size/price.

Barts has ~ the same die size as the Fermi 106/gts450. Think about that for a bit. Same 40nm node, same size, similar thermals, over twice the performance.
I can't see NV doing the same architecture in Fermi 2, they'll have to split to have 2 GPU architecture, for gaming and HPC.
 
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Ares1214

Senior member
Sep 12, 2010
268
0
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Cayman is ~15% bigger than Cypress.

Barts is 2/3 of a Cayman, Not 1/2. In dx11 games that makes use of tessellation, Barts will >= 5870. Otherwise the perf target is 5850, which is still pretty good considering its size/price.

Barts has ~ the same die size as the Fermi 106/gts450. Think about that for a bit. Same 40nm node, same size, similar thermals, over twice the performance.
I can't see NV doing the same architecture in Fermi 2, they'll have to split to have 2 GPU architecture, for gaming and HPC.

I predicted that 6770 would come close to 5850-5870 performance, if it had 256-bit GDDR5. Also, AMD naming system between generations has lately been add 900 to get next gen performance. 4870+900=5770. 5870+900=6770. However, as asked before, are you going give sources, background, or proof, or are you just going to disappear? Granted, you are giving very detailed info that would take the mind of a 4 year old to imagine, but knowing it isnt just lucky guessing would be nice.
 

Skurge

Diamond Member
Aug 17, 2009
5,195
1
71
amd has deliberately given information to their board partners to test and see who is leaking and who is airtight. some of the leaked info might or might not be true. the current rumor is that barts xt was going to be released as 6770 but was fast enough to be rebadged as 6870, so amd bumped up cayman xt to 6970 and cayman xt x2 as 6990. would likely be first rebadge in vc&g history that actually occurred before actual launch.

Maybe the remaining is a way to see who the leaky partner is?
 

Will Robinson

Golden Member
Dec 19, 2009
1,408
0
0
Originally Posted by bryanW1995
amd has deliberately given information to their board partners to test and see who is leaking and who is airtight. some of the leaked info might or might not be true. the current rumor is that barts xt was going to be released as 6770 but was fast enough to be rebadged as 6870, so amd bumped up cayman xt to 6970 and cayman xt x2 as 6990. would likely be first rebadge in vc&g history that actually occurred before actual launch.
If they manage to get 5870 performance out of their new $200-$250 range HD6770 then it will dominate the market.
Will it be that fast?
 

Keysplayr

Elite Member
Jan 16, 2003
21,209
50
91
What bothers me the most, is that he doesn't even acknowledge these questions being asked of him. Totally ignores them and doesn't even give any reasons why he can leak this info, but won't even say why he can't.
 

Skurge

Diamond Member
Aug 17, 2009
5,195
1
71
What bothers me the most, is that he doesn't even acknowledge these questions being asked of him. Totally ignores them and doesn't even give any reasons why he can leak this info, but won't even say why he can't.

Don't You know that's how witness protection works .

Anyway, You can take his info at face value or just ignore it. I think we have established that he's not gonna answer any question we ask about his "sources"
 

Kenmitch

Diamond Member
Oct 10, 1999
8,505
2,249
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it IS funny because what are the odds of it happening just like that within hours after we argue about it?

Well it is kinda funny when you put it that way....But on the other hand with your avitar things like that can be expected also
 

Ares1214

Senior member
Sep 12, 2010
268
0
0
Well, if 6770 has 256 bit GDDR5, and 6870 is also 256 bit (rumors of 320-384 bit, but doubt it) then the only thing seperating them would be disabling shader cores, stuff like that, and lowering clock speed. 6870 is 850/1600. 5870 is 850/1200. Therefore, 6770 would only really need 850/1200 clock speeds to equal the 5870. Any stream processor count on it known? ROP? Texture units? Silverforce, this is where you infinite, yet sourceless knowledge on this subject comes in :hmm:
 

Grooveriding

Diamond Member
Dec 25, 2008
9,110
1,260
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If they manage to get 5870 performance out of their new $200-$250 range HD6770 then it will dominate the market.
Will it be that fast?

Who knows, we'll find out next month. It certainly is realistic.

If the 6770 is as fast or damn close to a 5870 at a mid-range price it will be pretty nice indeed. It would be interesting to see what happens to 5850s, 5870s, 460s, 470s and 480s though. All of them would need a steep price cut.

I'm not in the market for the 6770 but would love to see it hit that performance.

I'm looking forward to the 6870 single-gpu flagship. Give me 130%+ GTX 480 performance with 80% of the heat output and I'll be a happy camper.
 
Sep 9, 2010
86
0
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If it happens, it would be great, it had been happening for quite a while, new generations of midrange cards matching previous high end generations of cards.

Old Generation_______New Generation
HD 3870____________HD 4670
HD 4870____________HD 5770

So there's a posibility than the HD 6770 can match the previous HD 5870, but considering that we're hitting a wall where performance gains are in diminishing returns, it would be a feat because the HD 5870 performance is no slouch.
 
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