Confused about what cpu M571 mobo will accept!

[Callas]

I have a Eurone M571 mobo. Specs say it will take an AMD k6 2, but don't say how high. On Pricewatch.com, sellers say it will take up to 450. If the 450 has an internal clk spd of 100, and the board only has 66,75 and 83 available, with multipliers up to 5.5, how must you set the jumpers to achieve 450? Would this board also allow overclocking?

[otheos]

The K6-2 remaps the 2x multiplier to 6x.
I have a M570 PCCHIPS motherboard (very similar to yours) that supports max 83Mhz FSB and 5.5x max
I run a K6-2 450MHz at maximum setting for the board, 6x83=500 @ 2.2V runs really great.
Go for the k6-2 450AFX (2.2V version) of the k6-2 500. Before you buy it make sure you can actually run your motherboard @ 75 or 83Mhz because other hardware is stressed at these settings since the PCI and AGP is overclocked quite seriously (the AGP to 83 from 66 and the PCI to 41 from 33 when FSB @ 83 - PCI=FSB/2 AGP=FSB). Some hard drives, AGP cards and other hardware cannot take it.
Do a test, run your current CPU @ a setting where it clocks the same as now but with FSB 75 and 83 and lower multipliers. This way you will know that any problems will be due to other hardware and not the CPU since it makes little difference to the CPU what mutlixFSB you run it to as long as it runs at specified MHz (not overclocked). This will be true for the new CPU. The K6-2 500 will perform the same whether it run @ 6x83 or 5x100 or 4x125. It is the other hardware and notably the memory that runs at lower than 100Mhz that will cause your system to be slower than if you had a 100Mhz FSB option. At this time it is a bad idea to buy a new ss7 motherboard, so as long as 75 or 83 FSB works get the K6-2 and clock it to 6x83 and be sure you will be marginally slower than if you'd spend another $70 for a new 100Mhz (or higher) motherboard. Get some memory (total of at least 64MB or 128MB) instead, this will give you a boost by not having the HD swapping all the time.

oops I got carried away.....

Good luck

[Callas]

Boy... am I glad you dropped in ... more help than I expected. I did like you said. I tried both 83 and 75 clock settings, but couldn't find any settings that would do a clean boot. I didn't fool around with any voltage changes. Since I'm using an AMD k6 266, when I went back to the 66 setting, I decided to try the 4.5 multiplier to see if it would run at 300. Seems to be running fine. Heatsink is cool. ... The question now is, should I forget about the k6 2/450, and go for the 400 or even a 350, so I can stay at 66mhz? What settings are available for the 400? 350? What else should I try? ... Thanks a bunch for your concern.

[Callas]

... I failed to mention that I have a combination of ram ... 1 stick of 32mb PC100, and 16mb EDO 60ns. Would this cause problems in booting up at 75 and 83 clock speeds? I can put 64mb of PC100 in and try agian, if you think it would make a difference.

[Callas]

Okay otheus ... You did it. You got me movin' on down the road in style. ... I did just as you advised and tested the hardware by setting the bus speed at both 83 and 75, to see if the hardware could handle it. NOT. ... Decided to back off and keep the setting at 66mhz and put in an AMD k6 2/400. The key, of course, was your tip on using the 2x multiplier and let the CPU switch to 6x, thus yielding the needed 6 x 66. It worked! 400mhz is just fine with me. Plenty fast for a budget PC. ... I owe you. Thanks a bunch.

[cpucook]

I ran my k6-2 450 on a M571 mobo. The settings I ran were 5.5x83fsb @ 450. I had no problems.

cpucook