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

To: Tenchusatsu who wrote (39827)	10/21/1998 9:12:00 PM
From: Steve Porter	Respond to of 1579130

Tench: No not really.. you can just drop and go with most of today's .25um Processors. Remember the PentiumMMX for mobile have a 2.1v core requirement. There is no reason to believe that exceptionally perfect K6s can handle a 2.1 core voltage. Hell the K6-2 in my machine right now is running at 2.1v.. infact is overclocks more stably at this setting than 2.2 (although it should be said that 2.1v on this motherboard is more like 2.15 but hey ;-).. You have to remember that the K6 and K6-2 aren't particularly power hungry devices. Especially the K6. Someone else can elaborate on teh details of the K6-M (mobile) since I don't have time to go back and search. But from what I remember it was concluded that core was 2.1v. Regards, Steve

To: Tenchusatsu who wrote (39827)	10/21/1998 9:24:00 PM
From: Ali Chen	Respond to of 1579130

Ten <why isn't there a K6-2 version for mobile computers?> I would guess because the notebooks are not supposed for playing 3-D shooting games. Just imagine, a CEO on a business trip in an airplane... shooting his own CFO in a deathmatch across a wireless network.. Not! Serious people prefer to use their $4000 notebooks for something more intellectual and relaxing - playing Hearts, of "alone in the dark-II" in the planes... Hugs to Hillsboro...

To: Tenchusatsu who wrote (39827)	10/21/1998 9:37:00 PM
From: Maxwell	Read Replies (2) \| Respond to of 1579130

Tenchusatsu: <<Then why isn't there a K6-2 version for mobile computers? I remember being told that the K6-2 has a high leakage current. I guess that says nothing about the K6, but it's still hard for me to believe that the cores in the desktop and mobile versions of the K6 are identical, and that the only difference is the package.>> For a give process the Idsat (saturation current) and Idoff (leakage current) are fixed. The Idsat and Idoff are related in the universal curve. The higher the Idsat the higher the Idoff. The higher the Idsat the faster you can make the chip runs (higher MHz). Low Idoff is good in mobile because of low power dissipation while in idle state. In active mode the amount of power dissipation is strongly depended on the chip architectural design. If you compare the PII and K6-2 the PII has higher power dissipation at same frequency and same Vcc. It is interesting to note that PII-300MHz at 1.8V dissipates about 8-9W while the K6 mobile at 300MHz of Vcc=2.1V dissipates only ~6W. The bottom line is that the notebook has a thermal envelop of about 8W-10W. Low leakage is good but not a prerequisite. The most important thing is how much the CPU dissipate while it is active. Low Vcc is good since Power=CfVcc^2 where C=total capacitance and f=frequency. There are many notebook vendors which use just PGA K6/K6-2 for their notebooks. Special packaging only reduces footprint. Maxwell