Setting it above the factory default will increase clock speed (at least the clock speed that's reported to you), but that "increased" clock speed will not translate to any performance improvements at all.
This means that the multiplier is ineffective in driving the clock above its maximum default value. So the next time you see screenshots screaming something like "6.00 GHz" on air with the base clock at its default 100 MHz, don't be fooled, trust only those overclocking feats in which the multiplier is set at the maximum default (29.0x) or lesser, and in which the overclocker has increased the base clock among other things.
AMD A8-3850 has ineffective BClk multiplier due to BIOS glitch
Posted on Thursday, July 07 2011 @ 23:55 CEST by Thomas De Maesschalck