On 20 Nov 2001, at 21:11, George Woltman wrote: > At 07:54 PM 11/20/2001 -0500, A & T Schrum wrote: > >I looked but hadn't found how an AMD XP 1600+ should identify > >itself within Prime95. It calls the processor a Cyrix 6x86 running > >at 144 MHz when it is running on a 1400 MHz motherboard. I set it > >to an Athlon at 1400, are the settings correct for an AMD XP 1600+? > > Yes. BTW, if someone wants to improve the code in prime95 to > properly identify AMD chips, I'd be glad to include it in a new > release. Contact me and I'll point you at the code that needs > tweaking.
I changed the CPU in one of my systems (running mprime) from Athlon 1200/266 to Athlon XP 1700+. I did nothing except change the CPU speed in the menu. The speed improved - by about 17%, which is about what is expected - and it's running 7C cooler, but that almost certainly has more to do with the fact that I also changed the cheap "AMD approved to 1.3GHz" CoolerMaster heatsink/fan for a Thermaltake unit (with the 26 cu ft/min YS fan, not the 38 cu ft/min Delta fan, which might do a better job of cooling but is _very_ noisy!) Is there an issue here in that Prime95 (& presumably NTPrime) detects the processor at startup but mprime doesn't? Or does the program only "guess" the CPU type & speed when the program is installed? BTW Athlon XP all run at 266 FSB. It looks as though the "speed rating" relates to the actual core speed as follows: Take "speed rating" (1600 in the case of an Athlon XP 1600+) Add 500 (2100) Divide by 1.5 (1400) Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
