R580+

[Rys]

R580 = rev. A22
R580+ = rev. A31

so... ATi stopped production of A22 and replaced it with A31 revision?

Yep. Any R580-based SKU will have A31 'R580+' from now onwards, including X1900 XT 256, etc.

 

[Sunrise]

Die Size of G80 is smaller than that of R580(not 80nm Low-K R580+)

R580+ isn´t on 80nm.

 

[trinibwoy]

R580+ isn´t on 80nm.

Then what exactly is the + for ?

 

[INKster]

Then what exactly is the + for ?

Most likely GDDR4 tweaks, fixed bugs, redundant die parts removed, etc.

 

[Sunrise]

Then what exactly is the + for ?

To differentiate the "old" from the "new" R580 cores, which are based on A31.

 

[trinibwoy]

To differentiate the "old" from the "new" R580 cores, which are based on A31.

Yeah but what about the new cores deserves the + ? We get different core revisions all the time.

 

[trinibwoy]

Most likely GDDR4 tweaks, fixed bugs, redundant die parts removed, etc.

Got a source for all that or are you guessing?

 

[INKster]

Got a source for all that or are you guessing?

Maybe i am, maybe i'm not.

Yet, isn't that the definition of a core revision ?
Even GDDR4 support wasn't exactly new on the original R580.
R520 had it too.

 

[trinibwoy]

Didn't know there was a definition of a core revision. And there's no evidence to indicate that GDDR4 support was tweaked in silicon since R520.

 

[INKster]

Didn't know there was a definition of a core revision. And there's no evidence to indicate that GDDR4 support was tweaked in silicon since R520.

http://www.beyond3d.com/reviews/ati/r520/index.php?p=05

R520's memory controller already has the capabilities to support all current GDDR memory types, as well as GDDR4 which is coming in the near future. The design of the memory is such that it should scale to beyond 1.8GHz memory speeds over the course of its lifetime, which means that this memory design is likely to remain in ATI's designed for a few generations now; speeds in the order of 1.0GHz have already been achieved on R520.

Back when R520 was being conceived there were no actual GDDR4 production samples, i think.
Supporting a new memory technology always carries risks, and bugs get fixed in every core revision.

It's no different on CPU's.

 

[Sunrise]

Yeah but what about the new cores deserves the + ? We get different core revisions all the time.

I don´t think so. Not like that.

 

[Razor1]

Didn't know there was a definition of a core revision. And there's no evidence to indicate that GDDR4 support was tweaked in silicon since R520.

They wouldn't have done another spin if they didnt' have to, but anyways whats the 31 mean, don't remember, first was for metal layer and second number was for modification or visa versa?

Ok first number is actaully change in the chip the second number is metal revision. So there was a change in the chip but what change not known lol

 

[trinibwoy]

I don´t think so. Not like that.

Not like what?

Back when R520 was being conceived there were no actual GDDR4 production samples, i think.
Supporting a new memory technology always carries risks, and bugs get fixed in every core revision.

It's no different on CPU's.

Maybe, but it's still unfounded speculation till we get something more concrete.

 

[BRiT]

since this is only a rumors thread....

The new rev/spin of R580 was to add DX10 features.

 

[INKster]

since this is only a rumors thread....

The new rev/spin of R580 was to add DX10 features.

Ok, so now R580+ is actually R600 ?

 

[mhouston]

How about 600+-20. ;-) (couldn't resist)

 

[Tim Murray]

since this is only a rumors thread....

The new rev/spin of R580 was to add DX10 features.

Worst rumor ever.

 

[Skrying]

ATi decided the R600 was just to powerful right now and instead just further evolved the R580 architecture with added DirectX 10 features.

 

[trumphsiao]

R580+ isn´t on 80nm.

you are totally wrong....:smile:

 

[hoom]

They tried to fix whatever kept them short of 700mhz on the original core but it was unsuccessful & they are stuck with 650mhz again ?