Advanced Micro vs Intel (AMD / INTC) Message Board

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Technology Stocks : Advanced Micro vs Intel (AMD / INTC)

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From: pgerassi	8/13/2008 11:58:47 PM
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Wbmw: And the XO isn't a PC either. It has only 128MB of RAM. So how does Atom with 2GB makes for an apples to apples comparison? Try it with 128MB of slow DDR 200MHz and then compare speeds. Besides, the Atom is dead slow. As to your contention that it matches a Banias at 1.2Ghz according to "my reviews" and not back that up with links. BTW a 945G chipset with a 1.6GHz Atom that uses 60W only gets 46 minutes on the a POV-Ray test (not the standard test used in the link you provided). A 2.13GHz Core 2 Duo T2600 got 330 seconds on a POV ray test (another one it seems) while the 1.6GHz Atom got 1660 seconds. That puts the Atom's performance at 20% of the C2D 2133MHz on the exact same MB using 75W. Or the equal of a SC Banias (Pentium M) of 850MHz assuming the best linear clock performance scaling on the link you provided (which obviously isn't seen on those benchmarks). That matches about a 600MHz K7 (Duron). All at the same 512MB to 1GB RAM. Of course that is well beaten by a 1GHz Geode NX1500 (Athlon AXP-M). Its no comparison to a 1GHz Sempron at 8W (65nm SOI Sherman) on a ITX M690G/MB600 using only 15W, 1/4th what the Atom/945G above uses with 1GB DDR2. There is more good stuff on the Sempron ITX board including the far better 690G IGP and video decoder. An ITX MB using the higher performing M740G/M780G/M790GX & MB700/MB750 could throw a monkey wrench by using the RV610 IGP's GPGPU to speed up POV-Ray renders. 400/500/700Mhz 40 FPMADD's per clock is vastly larger than that of a 1GHz SC K8, 32/40/56 SP GFlops versus 4 SP Gflops. As for the 733MHz Xbox, the small amount of RAM in an Xbox matches what the Geode LX 800 has to deal with. That is likely the source of the large render time difference as the render has to swap to disk (Xbox) or flash (XO). Thus your contention that a 1.6GHz Atom would have 4-5 times that of Geode LX 700 at 400MHz vastly overstates the real case. Even using conservative scaling, Atom delivers less than 850MHz Banias performance which is fairly close to what a 850MHz P3 did given much more memory. What any review of yours likely forgot to use just 128MB of slow memory to do the performance comparison to Geode LX 800. The Xbox render probably does a good job of that. All of a sudden Atom is less than 50% faster assuming linear scaling. With poorer scaling factors, it may not even beat Geode LX 700 (400MHz). One benchmark that Intel would avoid with passion is anything using AES 128 de/encryption as Geode GX and LX have hardware acceleration built in. Tests show that it is faster than a 3GHz P4 which likely would blow Atom completely out of the water and keep up with slow Turions in AMD64 mode. Pete

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