Hello,
I have my current Mac Pro which is a Harpertown 3.0(3.2) 8-core with the radeon 4870 hd + 8GB of memory DDR2 800. I also sold my machine yesterday for 2000.00 and put it towards the purchase of the 2.66 Quad-core 2009 Mac Pro which has the single processor in it.
Question: Will performance on the 2009 be much better than on the 2008 Harpertown 3.00 I once had? I did move all my 4 1TB drives over to the new system + I moved my radeon 4870HD over - I ditched the GT120. I also installed 8GB of memory in my new system.
I don't use pro-apps and money is tight as to why I couldn't afford even a refurb 2.26 8-core. But I assume that the refurb 2.66 I bought with its hyperthreading under Snow leopard can make a difference.
For gaming, the 2.66 will be quicker then the 2.26 and might be marginally faster then the machine you sold (8 core will not help for gaming). Do a google search for the gaming benchmarks for the different systems.