On Tue, 9 Sep 2008, Nic Larson wrote:

Need to buy fast computer for running R on. Today we use 2,8 MHz intel D cpu
and the calculations takes around 15 days. Is it possible to get the same
calculations down to minutes/hours by only changing the hardware?

No: you would need to arrange to parallelize the computations. I'd be surprised if you got a computer within your budget that was 3x faster on a single CPU than your current one, and R will only use (unaided) one CPU for most tasks (the exception being some matrix algebra).

Should I go for an really fast dual 32 bit cpu and run R over linux or xp or
go for an quad core / 64 bit cpu?
Is it effective to run R on 64 bit (and problem free
(running/installing))???

All answered in the R-admin manual, so please RTFM.

Have around 2000-3000 euro to spend
Thanx for any tip

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Brian D. Ripley,                  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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