6 p5-550 Technical Overview and Introduction Two USB 2.0 ports Two HMC ports Two remote I/O (RIO-2) ports Two SPCN portsIn addition, the p5-550 features one internal Ultra320 SCSI dual channel controller,redundant hot-swap power supply (optional), cooling fans, and up to two processor powerregulators.The system supports 32-bit and 64-bit applications.1.3.1 Processor card featuresThe p5-550 accommodates 2-way processor cards with state-of-the-art, 64-bit,copper-based, POWER5 microprocessors running at 1.65 GHz that share 1.9 MB of L2 onchip cache, 36 MB of L3 cache, and eight slots for memory DIMMS using DDR1 technology.This processor card (FC 5237) is a Capacity on Demand (CoD) processor card, which meansit provides the physical processor resources, but an additional activation is needed to use theprocessors. Different options for activating them are available; see Table 1-3.An initial order of the p5-550 system must contain the FC 5237 and at least two processoractivations (2x FC 7871 or FC 7871 and FC8450).The permanent activation options are Permanent CUoD (shipped from manufacturing asactivated, or for later activation of available non-activated processors through the HMC) andno-additional-charge CUoD (one processor at no additional charge, if the initial orderqualifies for the Value Pak options, see Table 1-7 on page 10). Temporary activations ofprocessors are provided by Reserve CoD (prepaid 30 day reserve), and On/Off CoD. See 3.1,“Capacity on Demand” on page 48 for further details about CoD activation concepts.Table 1-3 contains all the available feature codes for processor cards, at the time of writing.Table 1-3 Processor card and processor activation feature codesEach processor card features one POWER5 chip, with two processor cores that share1.9 MB of L2 cache on-chip, 36 MB of L3 cache, and eight slots for memory DIMMs usingDDR1 memory technology.Processor card FC Description5237 Two processors, 0 activated, 1.65 GHz, eight DDR1 DIMM socketsOne processor activation for base FC 5237CUoD (permanent) 7871No-additional charge CUoD(Value Pak)8450Reserve CoD (30 days) 7934On/Off CoD activation (oneday) billing7931 (requires one FC 7930 to enable On/Off CoD)