Is this a good psu OCZ StealthXStream OCZ600SXS 600W ATX12V / EPS12V SLI Ready Active PFC Power Supply?

is this a good psu OCZ StealthXStream OCZ600SXS 600W ATX12V / EPS12V SLI Ready Active PFC Power Supply? for 4850 radeon and one hard drive and overclocking my phenom 9950 black edition?
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