One advantage of the dual core cpu is that it should run cooler when its not being worked too hard so the fan will run slower, I think theyre variable speed dependant on how hot the cpu is.
A bit like the turbo analogy of a car again, when you dont need the power it just trickles along not using much of the available power, then when you put it under load or put your foot down in the car the turbo kicks in to boost the power
The medion has speakers built into the monitor so they would only be stereo and probably not very good.
The 630 CPU is a cheaper one than the 650, its still a 64 bit but its a single core cpu, again ebuyer.com price :
Intel Pentium 4 630 3 Ghz Socket 775 800Mhz 2mb Retail Boxed
£155.24
£182.41 inc VAT
Slightly faster but not a dual core.
I read a comparison review on dual core v single core but with faster cpu speeds last week.
For a dedicated gamer the single core had a slight advantage over the slower rated dual core, I guess its a bit like turbo lag to use the car analogy again.
For general use, especially if multi tasking then the dual core was the one to go for.
The Dell is good value as well but hasnt got a few things that the medion has such as the digital tv tuner card, dont know if thats something youd use or want but it would swing it for me along with the dual core cpu as I am not a gamer but do lots of multitasking
I suppose its handy for a standby one in case your cash doesnt come in time for the medion Michelle and you dont fanct waiting for another medion special offer from either toys r us or aldi or lydl