On Thu, 14 Aug 2008 20:32:22 +0200 Joachim Steiger <[EMAIL PROTECTED]> babbled:
> qrazi wrote: > > The test referred to are with the nettop version of the Atom, the Atom N230. > > That CPU is paired with a standard 945GC chipset, which consumes between 15 > > and 20 Watt. Hence the high power draws in those reviews. > > > > Intel also has the Z series, which include speedstep for even lower > > powerconsumption for the CPU itself, but they are also to be used with the > > Intel US15 mobile chipset. For a 1.6 GHz Z530 Atom, with the US15 chipset, a > > maximum draw of 5 Watt is reported. That is way lower then the combination > > that PC Perspective has tested. > > > > Although probably still not low enough for use in a phone. That however > > might come in future generations, since Intels plans are to include more, if > > not all, of the chipset functions into the cpu itself. > > > > thanks for summarizing it so well > thats also my conclusion: x86 is not ready yet for really mobile use. > we should evaluate it more when they can punch the '<1W when in use' limit. > > for comparison: our cpu currently uses <90mA when in use. > add the chipset, the lcm and interfaces (don't forget wifi, bt and gsm) > and then see battery sizes and capacity -> for a reasonable standby AND > talk time we need to not peak far beyond 1W when in use and be far > beyond that all the rest of the time. > also things like high-clocked ram (ddr compared to simple sdram) or > internal usb connections are energy suckers (thats why sdram with > <200mhz and things like sdio/spi/i2c/cmoslevel-serial is preferred to > usb and ddr ram. > > its always getting things into a tricky balance to have something usable > at the end (and not a 'see how fluid it moves the icon' - 'oh.. batter > is empty' - showcase ;) aye - and even so. arm-based solutions are cranking up the power. omap 3xxx and qualcomm's snapdragon are not slow-pokes. and they are far beyond anything intel has in performance-per-watt when you are in the 1watt (give or take) world. indeed you are very right - when intel have scaled DOWN to the existing embedded world.. we can talk, but as such an x86 phone is only a "development convenience" compared to arm (no cross-compiling from an x86 desktop). though we need to accept that we need to move beyond SDR into DDR/DDR2 ram and higher clockrates anyway - we need more performance to do the things people want, we just need to do it with the right generation of SOC that has reigned these power requirements in a bit... and well - maybe accept we need a meatier battery :) -- Carsten Haitzler (The Rasterman) <[EMAIL PROTECTED]> _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
