Hello PARTH3
Thank you for posting your query on HP Support Forum
You can go with the following:
Intel Celeron 420 Processor (1.6-GHz, 512K L2 cache, 800-MHz FSB)
Intel Celeron 430 Processor (1.8-GHz, 512K L2 cache, 800-MHz FSB)
Intel Celeron 440 Processor (2.0-GHz, 512K L2 cache, 800-MHz FSB)
Intel Celeron dual-core Processors
Intel Celeron dual-core E1200 (1.6-GHz, 512K L2 cache, 800-MHz FSB)
Intel Celeron dual-core E1400 (2.0-GHz, 512K L2 cache, 800-MHz FSB)
Intel Pentium dual-core Processors:
Intel Pentium dual-core E2160 Processor (1.8-GHz, 1-MB L2 cache, 800-MHz FSB)
Intel Pentium dual-core E2180 Processor (2.0-GHz, 1-MB L2 cache, 800-MHz FSB)
Intel Pentium dual-core E2200 Processor (2.2-GHz, 1-MB L2 cache, 800-MHz FSB)
Intel Pentium dual-core E5200 Processor (2.5-GHz, 2MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo Processors:
Intel Core 2 Duo E4500 Processor (2.20-GHz, 2 MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E4600 Processor (2.40-GHz, 2 MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E4700 Processor (2.6-GHz, 2 MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E6550 Processor (2.33-GHz, 4 MB L2 cache, 1333-MHz FSB)**
Intel Core 2 Duo E6750 Processor (2.66-GHz, 4 MB L2 cache, 1333-MHz FSB)**
Intel Core 2 Duo E6850 Processor (3.0-GHz, 4 MB L2 cache, 1333-MHz FSB)**
Intel Core 2 Duo E7200 Processor (2.53 GHz, 3 MB L2 cache, 1066 MHz FSB)
Intel Core 2 Duo E7300 Processor (2.66 GHz, 3MB L2 cache, 1066 MHz FSB)
Intel Core 2 Duo E8200 Processor (2.66-GHz, 6 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E8300 Processor (2.83-GHz, 6 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E8400 Processor (3.00-GHz, 6 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E8500 Processor (3.16-GHz, 6 MB L2 cache, 1333-MHz FSB)
Inter Core 2 Duo E8600 Processor (3.33-GHz, 6 MB L2 Cache, 1333-MHz FSB)
Intel Core 2 Quad Processors:
Intel Core 2 Quad Q6600 Processor (2.40-GHz, 8 MB L2 cache, 1066-MHz FSB)
Intel Core 2 Quad Q6700 Processor (2.66-GHz, 8 MB L2 cache, 1066-MHz FSB)
Intel Core 2 Quad Q8200 Processor (2.33-GHz, 4 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Quad Q9300 Processor (2.50-GHz, 6 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Quad Q9450 Processor (2.66-GHz, 12 MB L2 cache, 1333-MHz FSB)
Intel Core 2 Quad Q9550 Processor (2.83-GHz, 12 MB L2 cache, 1333-MHz FSB)
You also can check on the following link:
http://www8.hp.com/h20195/v2/getpdf.aspx/c04287277.pdf?ver=2
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K B T 86
Although I am an HP employee, I am speaking for myself and not for HP