Linked by Amjith Ramanujam on Thu 31st Jul 2008 20:51 UTC, submitted by snydeq
Hardware, Embedded Systems While using an AMD Barcelona server to create a portable benchmarking kit, InfoWorld's Tom Yager discovered something unexpected: "I could incur variances in some benchmark tests ranging from 10 to 60 percent through combined manipulation of the server's BIOS settings, BIOS version, compiler flags, and OS release." Yager put this matter to AMD's performance engineers and was told he was seeing an effect widely known among CPU engineers, but seldom communicated to IT - that the performance envelope of a CPU is cast in silicon, but is sculpted in software. "Long before you lay hands on a server," Yager writes, "BIOS and OS engineers have reshaped its finely tuned logic in code, sometimes with the real intent of making it faster [...] sometimes to homogenize the server to flatten its performance relative to Intel's."
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RE[5]: The idea?
by IanSVT on Sat 2nd Aug 2008 03:11 UTC in reply to "RE[4]: The idea?"
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That's known as "flashing the chip". You're basically playing with the air, fuel, and timing variables among other things. It's the modern day equivalent of changing your timing and setting up your carb(s) for a particular setup. The problem is, while you strive for perfomance gains, you can potentially sacrifice gas milage or hurt your engine(and void your warranty!)

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