Summary: MAKE SURE YOU HAVE MATCHED STEPPING CHIPS IF RUNNING WIDOWS 7, WINDOWS 8, WINDOWS 8.1. WITH MORE THAN 1 CPU. The Dell 690 workstation I put this into only blue screens if I try to run both Quad Cores I bought and right now I can only run one and that works great, it is a good improvement over the 2 Dual Cores @ 1.86 MHz.
Summary: Purchased this as a matched pair of processors as an upgrade to my Intel mac with 2 dual-core 2.66 processors. Install was fine and Apple's case design aside was smooth and easy. There's nothing I don't like about this processor. The only reason I would purchase another set of these processors is if I were upgrading another first gen Intel Mac Pro tower.
Summary: compared to the xeon 5365 the 5355's are a cheap and very worthwhile upgrade, my geekbench score doubled going from 2 dual cores to 2 quad cores. The install is easy, you will need a 9 inch 3mm hex tool and some thermal paste, be sure to tighten the heat sink bolts lightly or you will get hotspots, also apply more paste than recommended.
Summary: I ordered 2 of these and expected new in box processors. They came in a small plastic case and were very obviously used cpus, however they worked great and seller discounted the items for the mistake.
Summary: I've used a pair X5355 to upgrade my Quadcore Mac Pro 2006, 2.66Ghz to an eightcore machine. It went out very well. The geekbench result raised from the 5300 mark to 9400 points. A great upgrade for a very fair price.
GREAT PRICE! PERFECT PROCESSOR UPGRADE FOR MAC PRO 1,1
8 August 2012
Summary: i have a Mac Pro 1,1 with two 3.0GHz Dual-Core Intel Xeon processors. I wanted to upgrade to two "Quad-Core" processors. I purchased two of these Intel 2.66GHz Xeon X5355 processors after intensive research on which processors would work in my application. I am pleased to report that these replacements work just fine! The replacement process was a breeze and the first boot after was normal.
Summary: I have two of these CPUs on an Intel S5000Xvn motherboard and they are BEASTS! I get about 25,000 points a day at World Community Grid folding@home. I can have two or three modern PC games open at once and easily alt-tab between them in just a couple seconds, literally. The CPU usage will run about 40% with Batman, Bioshock 2, and Left 4 Dead 2 open all at once with absolutely ZERO stuttering. The CPU headroom is just insane.