GTL Ref is not about performance, it's stability. Manually setting it puts you in control of what the motherboard sets, as I'm suspecting that the GTL Ref when left on AUTO scales with the FSB, and not with VTT, as it was supposed to. That may be why when left all on AUTO everything is more stable, as both the VTT and GTL Ref scale with the FSB, and are effectively in sync.
All theoretical of course.![]()




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