Is it 8gb or 4gb ram? I see conflicting information on the page.

4gb, I also thought it was more.

is it ethernet or wifi?

as far as i remember it has both

Questions & Answers: Refurbished: Lenovo ThinkCentre M92z All-in-One Computer Core i5 i5-3470T 2.9GHz - 20in LCD Desktop - 4GB DDR3 Memory - 500gb HD - Windows 7 PRO - 3291B8U8 Business Black

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Lenovo ThinkCentre M92z All-in-One Computer Core i5 i5-3470T 2.9GHz - 20in LCD Desktop - 4GB DDR3 Memory - 500gb HD - Windows 7 PRO - 3291B8U8 Business Black

Intel Core i5 Processor Speed 2.90 GHz Processor Model i5-3470T
Standard Memory 4 GB Memory Technology DDR3 SDRAM 500 GB HDD
20" LCD
Windows 7 Professional

$279^.00 –