The IBM QS21 is the second generation Cell BE blade product to come from IBM for the open, IBM BladeCenter® standard for managed server chassis. Cell/B.E. processors offer extreme performance to accelerate compute-intensive tasks such as image processing, signal processing and graphics rendering. Single-wide blade form factor provides extraordinary computing density—up to 6.4 TFLOPS in a single BladeCenter H chassis.

Board Specs	product specs
Dual Cell BE Processors	PPE core, IBM®64-bit Power Architecture™
Memory	(each processor) 1 GB XDR DRAM, 2 channels each (2 GB per blade)
Hard Disk	Integrated IDE busmaster
IO Subsystems	Serial ports (2)
Expansion Options	Daughtercard 2 InfiniBand cards
System Management	H8 environmental monitor
Operating System	Yellow Dog Enterprise Linux
Size	Length 429.9 mm (16.925 in) Width 245.3 mm (9.657 in) Height 58 mm (2.283 in)
Power	IBM QS21 Dual Cell Blade total power Conforms to open BladeCenter requirements
Compliance	board/displayless operation FCC Class A European Directive 2002/95/EC (RoHS Directive) Safety UL 60950-1 and IEC 60950-1 EMC EN 55022, EN 61000, EN 55024:1998

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