This specific case (EXPO) is a grey area. I personally don't like overclocking, yet I've always enabled EXPO, for many reasons. First, because the producers o

This specific case (EXPO) is a grey area. I personally don't like overclocking, yet I've always enabled EXPO, for many reasons. First, because the producers of my RAM modules advertise it very clearly as feature; AMD advertises it quite loudly (https://www.amd.com/en/technologies/expo https://www.amd.com/en/technologies/expo) as well. I think (not 100% sure) that it's even often set in RAM benchmarks . Modern systems have very aggressive frequencies/dynamic frequency scaling, which blurs the limit of what constitutes overclocking. Intel sells unlocked models of CPUs that are supposedly can be "overclocked" (https://www.intel.co.uk/content/www/uk/en/gaming/overclocking-intel-processors.html https://www.intel.co.uk/content/www/uk/en/gaming/overclockin...). Many RAM producers sell modules based on their tolerance, so the fact that they're pushed to the limit - within the spec - is part of the sale. Having said that, I definitely draw the line to using voltages (or anything else) that are outside the specification, and I consider crossing it overclocking. Ultimately however, EXPO is a specification, so I don't consider it overclocking.