Originally Posted by climber
I actually don't mind the processor power since I only do 3d stills and having to wait 1 or 2 hours just means a break for my eyes but the Vcard is weak once you get over a million polygons..... again faster is better!
How does the current i5's stand up to what I have ..Core i7" I7-870 (Lynnfield) 2.93
I think any Vcard in the new macs would squash what I have so I will assume that question is answered
The i5 and i7 can be compared here:
The new iMac is 11,111 for multi-core 64-bit, your old one is 8994 so around 24% faster. This means if you waited for 1 hour on the old one, you'd wait 1/1.24 = 48 minutes on the new one, saving 12 minutes. There was a time when CPUs improved roughly 50% every year but not in recent years. A fair comparison would be the top-end i7, which scores 14,705 so 63% improvement for the same price in 3 years. This averages out to be 15-20% improvement yearly.
To really cut render time significantly, you'd need a Mac Pro or a cloud computing service. OpenCL can cut times dramatically if they can figure out a way to use it.
The GPU comparison is the 1GB NVidia 775M vs 1GB Radeon 5750. Apparently what Apple called the 5750 was specced like the 5850M so it's:
They have CAD viewport tests. The 770M is the only one with the tests but is about double in some viewport tests. There are a few of the tests that come out the same though so it depends on the software. It'll run cooler though.
There's a cheaper refurb of that one too:
You can buy RAM separate. You just can't get an SSD option if you wanted it and they glued the screen on but if you wanted the 1TB anyway, it's a good deal.
For selling old models, you can use a 25% depreciate as a guide so a 2010 model that cost $2199 would be worth around $927. It's a bit easier if you check eBay though and just use iMac 2010 and show completed listings. Then you know what people have paid for one in the last few months. The lowest one seems to be $1223 and highest $1595. That's quite a good resale value if you only lose $604 in 3 years. You can start your sale above $1600 and let people send offers. You might even be able to pay for a refurb 2013 model with a full warranty entirely from the sale.