[R] Hardwarefor R cpu 64 vs 32, dual vs quad

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Sep 9 17:17:38 CEST 2008

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,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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