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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Tenchusatsu who wrote (47634)	1/28/1999 2:41:00 AM
From: Paul Engel	Read Replies (1) \| Respond to of 1571690

Tenchusatsu - Re: " How much power does the Dixon mobile processor consume?" It looks like Dixon runs at 9.5 watts maximum at 366 MHz and 6.6 watts typical. This is at 66.66 MHz FSB with 66 MHz SDRAMs. The Maximum is a little higher than the Pentium II because the chip now has to "power" the 256K L2 cache. However, overall SYSTEM power drops because the CPU now powers down the L2 cache (since it is part of the CPU) when the processor enters the SMM - System Management Mode: "The mobile Pentium II processors 366 MHz have a thermal design power of 9.5 watts, consume just 6.6 watts when running typical applications, and support Intel's Quick Start technology. Quick Start reduces power to 0.4 watts in a low power state in power managed systems, for example between keystrokes in a word processing application. This low-power state helps extend the battery life of mobile PCs. " The DIXON design team spent a lot of extra time fine tuning DIXON to get very high yields at the 366 MHz/1.6 volt corner of the speed/Vcc spectrum. As for the K6-2, I don't know how much power it will dissipate. Re: " And do laptops with the mobile K6-2 or K6-3 run on a 100 MHz bus with PC100 SDRAM? YES. Re: "If so, does that 100 MHz bus consume significantly more power than a 66 MHz bus?" For the K6-2, YES - because the L2 cache is now clocked at 1.5 x the speed of the 66 MHz SRAMs. So, expect 50% more power for the "cache budget". The K6-3 may or may not have an external L3 cache. Without that cache, the performance DECREASES DRAMATICALLY - as per Anand's Benchmarks. So, AMD is BOXED IN - they go with lower power and lower performance - no L3 external cache - or they opt for high performance but will have to eat a lot of power clocking 1 or 2 MegaBytes at 100 MHz (maybe they compromise at 512 K ?) No matter which way they slice it, AMD will have to make some trade offs in their "mobile K6-3 offering" - HIGH PERFORMANCE and HIGH POWER or LOW PERFORMANCE and lower power. The notebook makers are going to think twice about this especially because Intel offers them HIGH PERFORMANCE at LOW POWER ! Paul