Thread: AMD K6-2 Problem

Hello, I have an old PC (Packard Bell) who has a 75Mhz Cyrix M II Socket 7 so I bought an AMD K6-2 400MHz that I installed in the computer and when I start it, it starts very well I can go into the bios, the CPU is recognized but it does not boot CD, SD Memory Testing after page and Co.

That makes me a black screen with a bar and I think as soon as I put the boot Cyrix all very well, I also try to put a PI 100Mhz but that he does not even recognize.Thank you in advance.

A K6-2/400 is supposed to work on a Super Socket 7 motherboard manager of a bus at 100 MHz with PC100 SDRAM. If you have a motherboard that can not handle this frequency is through the BIOS to manually set the CPU frequency in MHz x 66 X history to have an approximate value of 400 MHz.

If you did not coeff above 5.5, placing it on 2 the CPU interprets as 6 which will give 400MHz with a bus at 66 MHz. In any case I think is a minimum of SDRAM (PC66 at least). Aveec Memory FPM, EDO or BEDO it does not work if my memories are good.

Yes it is this one and I thought He was a 75Mhz. So the ram is the very first (small). The maximum coeff (jumpers) is x5.5. I can also set the vcore to 2.2, 2.8, 2.9 and 3.2V. And the FSB 75Mhz max. Finally CPUCLK y 'marked.

The type of ram c "is the SIMM and not SDRAM.

The K6-2 400 can be set to 66x6 or 100x4. Given your motherboard, I advise you obviously 66x6. Therefore in the bios that you find a setting FSB (which must be over 75 now ... or auto) and you put it on 66. Then we must find a parameter CPU Multiplier and put it on x6.

So there's nothing in the BIOS should fix everything with the jumpers, in my case I can do since I only 66x5.5 up 5.5 coeff. For the current setting is in 75x3 resulting in 225 and VCore 2.9. Yes it is and the SIMM is an old PC. I re-stated that the Cyrix works very well.

Try thus 66 * 5.5. (Vcore 2.2). If it works is that you do not need to put your bios update. If it's OK, you can try 75x5.5. In theory it should work (slight overclock of 12MHz is not bad!) In theory, anyway. For replacing the cyrix by the K6 / 2 without changing anything in your jumpers, it should also work. That may be the vcore in 2.9 that has not loved. I hope he has not taken a hit. It also set by jumpers or the Vcore is self?

Thank you for your answers. So yes by all jumpers. I think it is seen that the HS PC starts, detects the CPU and I can navigate the BIOS. He just does not boot the SD or CD. It makes me a black screen.

You can do a 6x66 MHz (400 MHz) by adjusting the coefficient of 2 (the CPU interprets as 6) and I already wrote above. If it does not work (for whatever reason) then put it in 5.5x66 MHz (366 MHz). Since your MB supports FSB 75 MHz, you can try the 5x75 MHz (375 MHz) or 5.5x75 MHz (412.4 MHz) => slight O / C that may require a voltage of 2.3 V (but I doubt it strongly). AFX is a K6-2/400 or AHX? (It's written on it).

I confirm the above post, I had (I always) an Asus P55T2P4 with a K6-2 400 and FPM or EDO SIMMs.The core voltage was set to 2.2 V (max 2.5 on the K6-2) was achieved by positioning a jumper cable (not documented) on the normal jumper block (2 jumpers instead of one). The coefficient was chosen in the position which gave X2 X6 with a K6-2 to CTX core.It worked well, with a bios that recognized the K6-2.