Extremely Slow Data Transfer in Win7 x64 with 82567LF adapter

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Extremely Slow Data Transfer in Win7 x64 with 82567LF adapter

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I have multiple Lenovo T500 laptops that are getting horrible data transfer rates while on Win7 x64. These work fine when running WinXP. I have tried the latest drivers on both the Intel and Lenovo support sites. Also tried a couple previous versions with no luck. Has anyone seen this issue or have a work around to resolve?

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