Topic on Glossary talk:Overclocking
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Putting aside having to know the quirks behind one's CPU, we have:
AMD
- AMD Overdrive shouldn't be used on >K10 CPUs.
- BCLK overclock is known to screw up with the SATA controller, requiring to disable AHCI and enable IDE mode for all but the most timid adjustments. This doesn't seem to happen when using AMD's own SATA controller driver in place of Windows's.
- BCLK cannot really be touched on AM4 boards, unless using a high-end motherboard with an external clock generator
- IGP overclocking may even be pointless for performance, at least with regard to some games on slower DDR3 platforms
- Forcing "directly" any IGP frequency will nuke any kind of idle state and power saving measure. This is not necessarily a deal-breaker, but it probably adds up to the number of reasons "practical overclock" should pass through the SMU-hacking tools.
Intel
- XTU and ThrottleStop, end.
General
- HPET.
- If for some reason you need to maximize memory frequency/bandwidth (whatever the crazy benchmark or the IGP troubles above), but memory multipliers aren't granular enough, one crafty expedient is to play with the BCLK
- Put aside the no-brainer improvements that always come with undervolting, in thermally cramped systems (especially low end laptops that may have a single heat pipe and fan for all components) additionally underclocking the CPU to afford more overclock headroom for GPU, or viceversa, can be a winning strategy depending on the application/game.