Advanced Micro Devices Inc (AMD)

[pgerassi]

Wbmw:

Another highly unfounded assumption. AMD will have a mobile 64 bit DC. And there are already some 64 bit application uses that can't be done with 32 bit versions. Photographic panorama stiching is one that comes to mind. As to a single core not outperforming a dual core any single threaded app will do that quite hansomely. There are few multithreaded games for exapmle. A faster SC beats a slower DC hands down. There exists plenty of evidence for this.

Also we know of one use where 64 bit CPUs run circles around 32 bit ones, encryption. 5 times speed improvements with some algorithms. There a single core at the same frequency (using half the power) would run circles around that 32 bit DC.

Lastly, don't assume that SC and DC will operate at the same frequency at the same TDP. Evidence shows that AMD loses two speed bins with their DC and Intel loses about three with theirs. So a 2 GHz DC should be compared with a 2.6GHz SC. For most users, the SC will appear to be faster in normal day to day use.

Also a 2.6GHz 64 bit SC will perform, at worst, 2/3 as fast as a 2GHz 32 bit DC in 32 bit apps, However the 2GHz 32 bit DC will perform 0 times as fast as a 2.6GHz 64 bit SC in 64 bit software.

So I would take the 64 bit SC over the 32 bit DC overall. Of course a 64 bit DC would satisfy both our desires. AMD has one, Intel won't. VoodooPC puts one in their DTR gaming laptops. Soon AMD will release a T&L flavor.

Pete