January 5, 20242 yr Currently have an 11900t (11th gen i9 supposedly 35w) but obviously tdp is bollocks and they boost up to 150w. So just wondered if anyone who has real world experience with a 12 / 13 / 14th gen intel cpu & HBA lsi card can talk about their Cstate/s & CPU boosts. Generally with a HBA cart the C states get limited to c2 which means the cpu stays boosted more than is needed. But what I want to know is how this works with these efficiency cores on the new cpu's? Basically if I did go and swap to a newer cpu would their be a noticeable drop in power usage or would it stay boosted like currently. Anyone got some data? Thanks
January 5, 20242 yr 3 hours ago, dopeytree said: Currently have an 11900t (11th gen i9 supposedly 35w) but obviously tdp is bollocks and they boost up to 150w. Intel refers to TDP as average power dissipation at base frequency which is 1.50 GHz for the i9-11900T. The processor is capable of boosting up to almost 5 GHz and therefore dissipating much higher levels of power than the stated TDP number. 3 hours ago, dopeytree said: Basically if I did go and swap to a newer cpu would their be a noticeable drop in power usage or would it stay boosted like currently. I don't think the word "boosted" is the right one to use in the context of idle states. I'm not aware of any big changes being implemented to the idle state tech within the last decade leading me to think that there's not much of a difference within the recent Intel CPUs, as long as they're allowed to fall back into the highest C-state. I suspect the reason we see for the systems containing HBAs not being capable to enter higher than C2 state is due to the HBAs firmwares that've not been optimized for efficiency therefore holding up the rest of the system from highest idle states. Power efficiency is not the biggest priority in the enterprise world. Recently Gamers Nexus (youtuber) in one of his latest CPU power consumption under workload videos has mentioned of his intention to also run an Intel/AMD CPU idle power comparison tests. That test (if completed) could provide some empirical evidence to discuss. Edited January 5, 20242 yr by Lolight
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