RAM 256MB DDR 266MHz

[Jobber]

Currently my machine has 2 No 256MB DDR at 266MHz, with a spare slot.
Will it support 3 No. 512MB DDR at 333MHz?

[0iD]

It probably will, but it'll try and run it at 266 and not 333, owing to the fact that the ram slots all run from the same bus.

[Jobber]

Thanks, I'll give it a try. Do you think that I will notice much difference?

[0iD]

Unlikely you'll notice much tbh

[Jobber]

Thanks again, still undecided about buying more RAM. Maybe look at other measures to speed up slow PC. For some reason I cannot enter the BIOS.
I press F2 at boot up which normally works, but windows starts up.

[MattBee2k2]

Thanks again, still undecided about buying more RAM. Maybe look at other measures to speed up slow PC. For some reason I cannot enter the BIOS.
I press F2 at boot up which normally works, but windows starts up.

Try pressing delete rapidly from the start.

[Joe of Loath]

You say your system is slow, how long since the last Windows (which I assume you're using) reinstall? Windows collects loads of cruft through use, unless you're an expert at keeping it clean. A reinstall starts you off with a clean slate, and often boot times are slashed in half.