AMD: R7xx Speculation

This would also bode well for the "100Mhz+ clock, virtually double bandwidth" leading up to 30% performance. But in the case of 800 it should be more.


And the Vantage scores seem on the low side if so.

 

A GX2 scores ~X4500.

 

Seconded. A positively "big" that is at least from me. So, after all, maybe we're actually seeing 32 TMUs at work in that chip - a number I would not have deemed possible in ~250mm².

 

Do you have one for RV670? RV770 certainly doesn't look small. But how can it really be that big on 55nm and not be faster than we're hearing?

I guess one way is 16TMU's and 800SP's

 

And 30% faster than the 4450 scores is x4400.

 

Oh, you mean like this? http://forum.beyond3d.com/showpost.php?p=1166843&postcount=2058

 

? 30% faster than what score?

 

Something is not adding up:

• Relatively large die size
• Performance estimates ~ 9800GTX
• 480 SP count

Could the drivers be intentionally borked so that performance is lower?

 

No he means like this - http://forum.beyond3d.com/showpost.php?p=1163672&postcount=1781

300 Posts earlier

 

You can find it here, but again different angle/tilt.

 

OSNAP!

But I did suggest that such a scale was doable on 250mm^2 for a few times.

If my sloppy Photoshop skills are suggestive of anything (using the measurement tool on slightly off scales, might deviate +-10%) the die is about 30% larger.

I got a scale value of about 133%, of which 192*133% = 255.36 mm^2


Information from Chiphell previously indicated 800SPs, a 256mm^2 die size, and they had the PCBs in January. To trust, or not to?

 

Not really that big after all:

​

In this picture "light grey" is RV670. I've superimposed RV670 on top of RV770 (which appears "black"). I created this picture by scaling a board shot of HD3850 so that the mounting holes for the heatsinks coincide.​

It looks like ~30% bigger, as rumoured.​

Jawed​

 

Damn, looks definitely larger than that. But then - eyes can be deceived quite easily.

 

LOL, I can't believe we know more about GT200 than RV770 at this point... The two should basically be known quantities by now.

 

After some photoshopping...

 

My bet is that R580 had a different set of mounting holes.

770 and 670 both have the X underlay and with similar coolers which probably indicates the same set.

The review seemed like they used performance settings on the test, and just upped AA/AF.

Not comparable to the real "Extreme" which has better textures, shaders, shadows and etc.

 

That was my initial assumption also, since R580 is somewhere around 360mm².

But I just checked - at least R580 and RV670 are at ~535mm hole to hole (center).

 

I'd tend to doubt it. Still, it's quite possible that the drivers could be unintentionally borked.

 

I think that's something I would have noticed. They used the extreme setting. Says so right above the first graph.

 

Correct, I have mounted a x1950xtx cooler on a x3870. The only mod needed was to saw away some of the plastic at the PCI slot cover end.