There should be no problem then. RB does not take up more than 80mb of RAM when pushed too its limits. You didn't mention your Proccessor speed,
However here are a few things which will help if you are on a slow machine:
1.) Reduce Screen Refresh Rate (In Preferences)
2.) Reduce amount of detail on Maps
3.) Select one picture download only
4.) Unselect viewing the vertical tracking view
5.) Unshow photo and details
6.) Untick network flights
Support
My earlier post on this seems to have gone over people's heads. I have a 5 year old PC with 256mB of RAM and RB is a happy bunny BUT this wasn't the case from day 1.
If someone with anything older than a new PC is not regularly 'cleaning' their PC, especially getting rid of temporary internet files, any application, such as RB requiring significant processor load
and internet access, will slow the machine down so bad that it will struggle to keep up. In fact, RB is a good gauge of your PC's health.
Until the PC is tuned up and has all the junk stripped out, including replacing RAM sapping anti virus software with less demanding products you can tick and untick all the boxes you like in RB and it won't make a blind bit of difference.
Just Google your anti virus software and it won't take too long to see what problems it's capable of producing.
My machine has a 2.8GHz P4 with 256 mB RAM and ran all day today on V1.4 from 7.00 am to 11.00 pm, sharing data, downloading 2 photos with not so much as a skipped heartbeat and I would say that there hasn't been a big improvement in performance speed over V1.3. If people are having problems with slow running of RB look elsewhere - as far as I am concernced the program runs fine, even on my old crock.