So at the very least, you can set it to 190/190W, the performance loss from that is virtually non-existent. This might actually less pronounced with a 12700K, as it doesn't use such an aggressive voltage-per-frequency setup as the 12900K. Going to 125/125W further improves the efficiency, and can still perform very competetively (almost the same) in all "lesser" full load such as gaming, but it will lose out a bit in fully multithreaded long rendering/encoding runs for example. In testing, I used only one which worked fine. The sweet spot is near 125 W, I'd say, but it also depends on the application."Įven going through the application performance results with a fine toothed comb, you can see that setting the power limits to 190/190W on a 12900K hardly loses any performance, but obviously needs 50W less power than the default 241/241W under very taxing load. The extra 8 pin connector is used to power added cards in the pci slots as well as added power for overclocking. Of course, such low limits will drastically reduce performance-you're trading longer runtime for lower overall power usage. ![]() The most energy-efficient configuration turns out to be 75 W, which would make the Core i9-12900K the second most efficient CPU in our test group, only beaten by the Ryzen 9 5950X. ![]() At 190/190, the 5600X can no longer keep up. So a CPU power connector will be either a 4+4-pin cable, or in some cases a complete 8-pin connector. While the default 241/241 configuration is less efficient than all Zen 3 CPUs, the Ryzen 7 5800X is beat as soon as you go below the 200 W limit. CPUs require 4, 8, 12 or 16 pins for power, which is why CPU connectors (12V EPS) are always possible to be diveded into 4-pins. If your OCD doesnt allow you to leave the empty connector block you can use the other cable with just one of the 4 pins connected. You can leave the other 4 pin block empty as it wont affect anything. "We also looked at power consumption and efficiency at these TDP limits and found that there's A LOT of efficiency to be gained at lower power limits. Id use only one of the AVX12V CPU cables, so a 4+4 pin connector installed into the one 8 pin connector block. This becomes clear when you read tests like this: ![]() In other words, as per usual in recent years, the higher-up CPU models are pushed quite far by default, and for the last little uplift in final performance, draw more power than necessary. Intel's only goal was to beat AMD in reviews when defining the MTP/PL, not to set a sweet spot that allows for the highest efficiency. You can even go lower than that with the limits. Hot 6 inch 2 x Molex 4 pin to 8-Pin PCI Express Video Card Pci-e ATX PSU Power Converter Cable - Molex to Pcie 8 pin Adapter. Click to expand.That is a sensible approach.
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