First post, by Eleanor1967
hey folks
I've owned this nice LS-486e rev D motherboard (picture from the internet) for quite some time now, and I always remember it being a bit unreliable, at least when using a Cyrix 5x86. A month or two ago I was playing around with it, testing different CPU's and stuff, trying to get it stable. In the heat of battle, swapping out different CPU's left and right, I inserted a CPU 90 degrees turned in the socket. Luckily, the CPU and the board survived and at least the CPU is still working perfectly, but the board is performing quite bad ever since. It is very slow, speedsys detects the CPU at 53 MHz even though it is jumpered to 100. Memory throughput (with a single 16MB of EDO) is only 16,6 MB/s. VGA memory throughput is shit too, you get the idea. Interestingly, the performance stays exactly the same when I put a jumper on the turbo switch.
So question is: Does anybody have an idea what I could have possible grilled that it would behave this way? Is their a likelihood that I can fix it, just by replacing a component/chip or two?
In other, slightly unrelated news the Cyrix 5x86 QFP chip I posted about in the bought this hardware thread is working perfectly (at 53 MHz) in this board, so that was a nice surprise this evening. 😀
Cheers, Eleanor1967