DailyTech has a roundup of 10 different reviews of the NVidia GeForce GTX275.
NVIDIA GeForce GTX 275
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via DailyTech – 4/2/2009 Daily Hardware Reviews — NVIDIA GeForce GTX 275 & ATI Radeon HD 4890 Edition.
Although HardOCP does not technically give a full-blown review to the NVidia GeForce 275, they do include it in their review of the AMD’s new Radeon HD 4890.
http://enthusiast.hardocp.com/article.html?art=MTYzNiwxLCxoZW50aHVzaWFzdA==