This item, 509319-B21, is the HP retail number for the product described as Intel Xeon X5570 (2.93 GHz, 8MB L3 Cache, 95W, DDR3-1333, HT, Turbo 2/2/3/3) BL490c G6 Processor Option Kit. Further details below.HP Option Part #: 509319-B21
HP Spare Part #: 506012-001
Note: This CPU kit comes complete with heatsink part# 511703-001 and any other parts necessary for installation.
Compatible with BL490c G6
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