DellPowerEdge R510 Technical Guide 376 ProcessorsR510 can operate in either single-processor or dual-processor mode. However, since the memory controller isembedded in the processor, when only one processor is installed in the system, it supports 4 DIMMs, withminimum memory of 1GB and maximum memory of 32GB (based on the 8GB module). When two processorsare installed in the system, it supports 8 DIMMs, min. 2GB and max 64GB (based on the 8GB module).Table 12. Supported ProcessorsModel Speed Power QPI L3 Cache FeaturesDDR3MemoryBusSpeedCoresX5570 2.93 GHz 95 W 6.4 GT/s 8 M Turbo, HT up to1333MHz 4X5560 2.80 GHz 95 W 6.4 GT/s 8 M Turbo, HT up to1333MHz 4X5550 2.66 GHz 95 W 6.4 GT/s 8 M Turbo, HT up to1333MHz 4E5540 2.53 GHz 80 W 5.86 GT/s 8 M Turbo, HT up to1066MHz 4L5530 2.40 GHz 60 W 5.86 GT/s 8 M Turbo, HT up to1066MHz 4E5530 2.40 GHz 80 W 5.86 GT/s 8 M Turbo, HT up to1066MHz 4L5520 2.26 GHz 60 W 5.86 GT/s 8 M Turbo, HT up to1066MHz 4E5520 2.26 GHz 80 W 5.86 GT/s 8 M Turbo, HT up to1066MHz 4L5506 2.13 GHz 60 W 4.8 GT/s 4 M – 800MHz 4E5506 2.13 GHz 80 W 4.8 GT/s 4 M – 800MHz 4E5504 2.00 GHz 80 W 4.8 GT/s 4 M – 800MHz 4E5502 1.86 GHz 80 W 4.8 GT/s 4 M – 800MHz 2QPI or Quick Path Interconnect: A point-to-point processor interconnect developed by Intel which is defined usingGigatranfers per second (GT/s), referring to a number of data transfers or operations.Turbo: Feature that increases the speed of the processor on demand (from OS) if the CPU is operating belowpower/thermal specifications.HT: Intel Hyper-threading technology.