IBM Aptiva 2193-422 with AMD K6-2/533

Hi all,

I've an IBM Aptiva with a motherboard provided to support up to AMD K6-2 550 ; mine comes with an AMD K6-2 533.

Well, the default jumpers show : a multiplier of 5.5 and a bus frequency as 97/129 (CPU/SDRAM); the SDRAM installed are PC133.

The possibilities of multiplier are : 3.5 to 6.0 per step of 0.5.

The possible combinations about bus are : 95/95, 95/126, 97/97, 100/100, 97/129, 100/133.

Well, as first tiny stage, I've increased the bus frequency to 100/133. So, now, I got 100 x 5.5 = 550MHz without any problem ; just +3.5% increasing

All the test about stabily are passed. All test show around 548MHz. Just some benchmarks like the SiSoft Sandra ones say the some performance in speed are lower ; for example CPU:773MIPS, CPU/Multimedia:MMX1355it/s, CPU/Memory bandwidth:99MB/s.

I've done nothing about voltage. I've added Rain 1.0 for software cooling. Fan and radiator seems to be nice dimensionned from the beginning.

Now, what's the next stage ?

I can't go further on bus frequency (see the combination above). I've just the choice to change the multiplier from 5.5 to 6.0.

Thus, I will got 100 x 6 = 600MHz !

Does-it's not a little bit too high for an AMD K6-2 533 ? What's the risk ?

Also, I've not find any voltage jumper in the "Hardware Maintenance Manual" downloadable in the IBM site and dedicated to the Aptiva 2193-422 ; because of course, the original User Manual delivered with the PC doesn't provide any line about jumpers and they just say : don't touch or the warranty will goes away

To finish, I've read in some ng that the AMD were internally locked about multiplier. Does-it's true (in this case, the 6.0 will be rejected) or a bogus-information ?

Thanks to share your experience
Cordially
Eric