Sun 375-3203 SunPCi IIIpro 1.6Ghz Co-Processor Card, with 256MB Memory – X2136A
375-3203 - SunPCI IIIpro Card Specifications Option Number: X2136A. (included). Install SunPCi IIIpro in Slot 2 for optimal cooling. Install XVR-100 in Slot 3 and SunPCi IIIpro in Slot 2 when installing these two cards.