Originally Posted by swaaye
Also, 5870 is more like only 30-50% faster than 4870. 3870 was a rather poor GPU and 4870 was a big improvement over it however. 3870 occasionally gets slapped around by even 8800GT for some reason. AMD's R600 and RV670 chips had problems with efficiency.
40nm had nothing to do with the switch to VLIW4. Cayman was originally to be 28nm but the delay to 28nm caused them to go back and set it up for 40nm. The chip is the same thing as it would have been on 28nm though. It takes them several years to design GPUs so they can't make major changes in a short period of time.
5870 is faster by a bigger margin then that + is dx11 thats a big enough improvement right their, 4870 was twice as fast as a 3870 you and i both agree on that and i agree the 3870 wasnt great anyway.
the 7xxx series is what the 6xxx series would have been had 28nm worked, what they released whas a revision of the core from 5xxx series and some regular un risky shaders and i agree it takes years to dev gpu's but their process fell over late in the day and they backtracked fast simples they needed 28nm to fit southern islands plus the old shader type(what went in anyway) but didnt have the room for the new core on 40 nm given the shader count increase needed to counter nvidia
7xxx new not revised southern islands core and new shader array
all im saying is im optomistic AMD will get it right and imho they playing a wise game due to knights corner + nvdia's project denver APU(what they gona call that APU prob NPU)
and i dont think they will choose to harm graphics performance just to better gpu performance they will still need benchmark scores to sell their gfx cards after all