AMD: R7xx Speculation
- Thread starter Unknown Soldier
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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=2058Side note:
625 (official clock for 4850) * 800 * 2
There's a magical number. I thought it would run for the highend, but looks like BOTH versions lived up to the PR.
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.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
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?
Jawed
Legend
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. :smile:
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.
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