I own a IMAC (20-INCH MID 2007) -- i believe i have 1GB memory. does that compare with the 256G i can get today with new Mac? B

You have not clearly identified the model Mac you wish to compare with the 2007 iMac. Check these bench test scores and you might be able to determine the relative performance of the Macs you are interested in.

https://browser.primatelabs.com/mac-benchmarks

Ciao.

You also appear to be interchanging random access memory (RAM) with disk storage. Both are now measured in GB but are two different things. No current Mac can handle 256GB of RAM but many have that much (or more) in storage.

Your 1GB must be RAM as the very first iMacs shipped with 4GB disk storage. This article may help:

http://www.tucows.com/article/2052

PDBmac wrote:

I own a IMAC (20-INCH MID 2007) -- i believe i have 1GB memory. does that compare with the 256G i can get today with new Mac?

PDBmac,

You are comparing RAM (your current 1GB) to Storage on a new Mac. Your current iMac has 1GB of RAM, the minimum sold on iMacs now is 8GB. Regarding storage, current iMacs can have up to 3TB of storage.