On Fri, 2005-01-28 at 14:09, Paul Johnson wrote: > Hi, > > > "After a short look at our benchmark results the conclusion is clear: > > AMD's Sempron is able to outperform Celeron D in most applications." > > Except one on my machine - actually working! > > It has the updated BIOS for the semperon. If I turn the clock down so > it's identified as a 1500+ rather than 2400+, it gets through happily to > the desktop and works. Bang it back to being a 2400+ and it won't hit > the desktop. > > Remove rhgb and things go a bit further (roughly boots halfway - gets to > applying iptables and then gives that annoying 2 tone oscillating > noise). Put it back on and as soon as it gets past mounting the drives, > annoying 2 tone noise. > > Doesn't matter which kernel version it is either. > Sounds very strange indeed Paul. Things to try maybe: - Tried resetting the CMOS and configuring the BIOS from scratch? Might be some obscure setting left over from when the Celeron was living on the board. - Can you run memtest86+? This could also be a faulty DIMM (or maybe even the motherboard itself) - What's the core temperature on the CPU (if this is available in the BIOS)? Could be bad cooling. I've never come across this "2 tone oscillating noise" you mention though - are you able to identify it's exact source? Best of luck, -- Tarjei