Ah, from what you're describing right there with locking or disabling powerplay states in Wattman, just be aware that ClockBlocker probably will not do better than what you're seeing (unless you're explicitly encountering a bug in the driver power-management). More likely than not your observing "power-throttling" (something that ClockBlocker does not try to bypass), so to keep your card's clocks up at the P7 maximum (across all games) you may need to reduce voltage or do a soft powerplay edit (see hellm's post on this) and increase the maximum power limits. Suggest checking in GPU-Z to see what's happening first and monitoring GPU power-draw. As always, increasing power-limits is overclocking ... so be sure that you really want to do this. It'd be better (thermals, card lifespan, etc) to reduce voltage if you can run stable at a lower voltage first. EDIT: To be clear, it IS worth it to get clocks stable in terms of the best gameplay experience and best frametime consistency. Sometimes this may mean capping your clocks at less than the maximum if you're finding the constant clock-changes are causing visible stuttering. Some games are worse offenders than others of course, some have absolutely no troubles at all despite the clock-changes ... so this is a trial and error type of thing. Far as ClockBlocker, give this bundle a try here. You may also want to attempt toggling the power-management option in Radeon Global Settings and disabling ULPS with either Afterburner or RadeonMod. ClockBlocker's Helper Module is 32bit, YAP's is 64bit. Both have similar implementations of their compute approach, though may of course have different results. Roger that, did find a new bug in the process with speculating the cause though . Which OS are you on right now? Also give that repackaged version and the suggestions above a try. If not, I'll likely need to make a version with more debug verbosity to get some insight into what's happening.