The specifications below were provided by Pervasive tech support for a DBA/Evo user with a 30 seat license.  
 
I would recommend a dual-core or quad-core CPU, the speed really does not matter because most Btrieve-based applications tend not to be very CPU intensive.  If you are running many SQL queries, then a little more CPU power is recommended.
 
For memory, I would recommend about 4 GB RAM.  This assumes that the server will be dedicated to running PSQL.  Since you (the customer this recommendation was made for) have only 1.5 GB of data, you should be able to set Cache Allocation large enough to cache all of your data, which will result in improved performance.
 
For the operating system, you can choose Windows Server 2003 or 2008, but I recommend you choose the 64-bit version.  You will also want to go with the 64-bit version of PSQL v10.10 Server.  Your 32-bit application will work fine with the PSQL 64-bit back end, and the PSQL 64-bit engine has a much, much higher limitation on the amount of memory that can be assigned to our database Cache.  If it matters to you, PSQL v10 (and v10.10) is certified on Windows Server 2008 (64-bit).  We sent engineers out to Redmond to work with Microsoft on the certification process.
 
Typically, I recommend a separate server for Terminal Server.  This would mean running the PSQL v10.10 Client on the Terminal Server, then using another server to host PSQL v10.10 Server.  If you want to run it all on one server, then I recommend you double the amount of RAM (from 4 GB to 8 GB).

Quote from awaretech on 10/01/08 at 12:59:51:

 
Sure can.