So the title is a little obvious, but here's the gist. I'm currently running a Supermicro 6027-DTRF dual node chassis as a home kubernetes cluster. I'm always trying to optimize my home equipment to use less power (I pay ~45c/kWh during peak), so I'd like to try and dial this down a bit, if possible. Each node came with 2x 2630V2 processors, for a total of 4 processors, and 8 sticks of DDR3. Specs on the processors:
2630v2: 2.6Ghz (3.1Ghz Turbo) @ 80W TDP
There are some good deals on E5-2643 v2's on Ebay right now, so I'm thinking of picking up 2 of them, and swapping the 4 processors for 2. Specs on the E5-2643 v2:
2643 v2: 3.5Ghz (3.8Ghz Turbo) @ 130W TDP.
95% of the time, my dual 2630's in each node are sitting around 5-10% usage. I should be fine going from 2x hex cores (24 threads) down to 1x hex-core (12 threads), and still keep that usage under 25 or so. The only time it ever really peaks is when I transcode video, then it goes to about 80%, but 3.5Ghz might help that somewhat. So my question is really this: Even though the 2643 V2 is higher TDP, the fact that it will idle most of the time (albiet a little higher idle than dual 2630 v2s) should result in less power consumption than running dual 2630v2's at 80w TDP, correct?
Edit: Yes I'm aware that TDP != power consumption. I'm asking if going to a single cpu that idles slightly higher will consume more electricity than 2x cpus that are idling slightly lower.
CPU usage on one node for last 24 hours:
2630v2: 2.6Ghz (3.1Ghz Turbo) @ 80W TDP
There are some good deals on E5-2643 v2's on Ebay right now, so I'm thinking of picking up 2 of them, and swapping the 4 processors for 2. Specs on the E5-2643 v2:
2643 v2: 3.5Ghz (3.8Ghz Turbo) @ 130W TDP.
95% of the time, my dual 2630's in each node are sitting around 5-10% usage. I should be fine going from 2x hex cores (24 threads) down to 1x hex-core (12 threads), and still keep that usage under 25 or so. The only time it ever really peaks is when I transcode video, then it goes to about 80%, but 3.5Ghz might help that somewhat. So my question is really this: Even though the 2643 V2 is higher TDP, the fact that it will idle most of the time (albiet a little higher idle than dual 2630 v2s) should result in less power consumption than running dual 2630v2's at 80w TDP, correct?
Edit: Yes I'm aware that TDP != power consumption. I'm asking if going to a single cpu that idles slightly higher will consume more electricity than 2x cpus that are idling slightly lower.
CPU usage on one node for last 24 hours: