
Originally Posted by
EvilBlitz
Shangai is Deneb, just for anyone thinking they are different. The only difference is that Shanghai is validated as a server part and wont use plain old DDR2/3(though thats probably more a bios/board implementation issue).
Shanghai/Deneb is more than just a die shrink, AMD has already stated this before.... However, I get the feeling it is more tweaks rather than any large wholesale changes. Eg, widening data paths, or enlargening TLBs etc.
Some parts they are transferring are not really optmised much. AFAIK there is something about them using the same cells for the L3 cache at 45nm as they did at 65nm, so the L3 cache density won't improve that much. This makes the die larger than it would be. Intel has always had the best cache density unfortunately.
However there are some drawbacks, this is supposedly their 1st implementation of the 45nm so clocks etc wont be as good as they should be, however the yields are good and clocks are better than expected.
I know magny cours the 6die is the 1st to use improved 45nm process, dont know how quickly they will shift the rest of production to that.
Im still putting my money on an avg ipc increase of 10-15%, closer to 15%. However its the better than expected clocks they will get that will help close the gap. Of course there will be selected benchmarks, esp on server Shanghai/Deneb will look really good.
However Nehalem 2P servers come out 2009, so AMD won't have the lead for very long.
Finally, I really like AMD, and only use AMD, but anyone thinking Shanghai/Deneb has a chance of beating Nehalem is smoking crack. Note that in the leaked internal AMD memo even they did NOT claim absolute performance leadership. Just performance per watt leadership.
AMD next chance to take the leadership crown is with Bulldozer, until then they will be competitive on price and performance per watt but thats it.
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