From the Pervasive web site:
Pervasive.SQL V10 "Summit"Pervasive PSQL Summit v10 supports both the 32-bit and 64-bit editions running on a supported 64-bit operating system and x64 processors with either a 32-bit or 64-bit application.
Pervasive.SQL V9.5Pervasive PSQL v9.5 and higher supports applications running in 32-bit mode on a supported 64-bit operating system and x64 processors.
Pervasive.SQL V9.1 and earlierPervasive PSQL v9.1 and prior (including Pervasive.SQL V8) support applications running in a 32-bit mode on the supported 32-bit operating systems and x64 processors.
More informationVisit the Pervasive knowledge base article
hereUsing Service Accent on a 64 bit CPUPlease read the following article:
 | | Title: Service Accent compatibility with Microsoft Windows Solution ID: 0404231425525 |