No, 650 watts isn't sufficient for an I5 12600K with an RTX 3070 Ti.
No, 650 watts isn't sufficient for an I5 12600K with an RTX 3070 Ti.
The Corsair CX650-F fits the i5 12600K with no overclocking, but the PSU you found is suitable for this setup. Your choice between the two options depends on budget and priorities. Upgrading to the RM850X would cost more and may not be necessary if your needs are limited. Stick with the CX650-F unless you want a gaming-focused system.
Since boosting the 12600k isn't feasible on a b660 board, seeking another perspective would make sense. Keep in mind you might be limiting performance with a 12400 alongside the 3070 ti. Another choice could be selecting a more affordable power supply. You could try the first idea but opt for an EVGA PSU like this one and cut costs by $50 on the PSU instead of the CPU.
650W on a 3070 Ti might be feasible but could cause instability. For consistent performance, I recommend 750-850W units for gaming. The processor selection is largely up to you and depends on your game preferences. The 12600 offers a significantly higher base clock, which becomes beneficial in newer titles that utilize more than four cores—though the boost clock drops unless you overclock. I’d choose the 12600k and pair it with a robust PSU. If budget is limited, the case and motherboard options can still impact your build.
Which of these parts have you bought already? The reason I ask is because the 3070 Ti tends to be very overpriced while being a little over 3070 performance (5% faster than 3070 at 1440p, 7% faster at 4k according to TechPowerup) but with 3080 level power consumption, so it's not something I'd really be considering buying unless you found just an absolute killer deal. Or if you already have it of course. The RX 6800 outperforms the 3070 Ti, uses like 60W less power (more in line with the 3070), has 16GB of VRAM vs the 3070 Ti's 8GB, and might be cheaper for you too. Also that board is great for the 12600k, but if you go with a 12400F instead you don't need that hefty a board unless you're planning on a later upgrade on the socket. Which I don't recommend doing, just buy the cpu you need from the beginning. But the B660m Mortar will handle the 12900k fine without throttling. If that kind of upgrade isn't in your future plans you can save a few bucks on board though if you go with the 12400F instead of the 12600k.
The prices for those graphics cards are generally higher than the 3070 Ti. The RX 6800, RX 6800 XT, RTX 3070, and RTX 3080 tend to cost more, especially when compared to the 3070 Ti you're considering.
I don’t have experience with other chips, but the 12600k has boosted my r23 by nearly 15% with only a small overclock. My goal was to suggest buying a more affordable 750w PSU for $80 before getting the 12600k. I realize now I didn’t explain that idea clearly.
It seems the right power is around 650w according to the official suggestion. I used Silverstone's 650w SFX with my 12900K and 3080ti without any problems. Depending on your financial plan, I might suggest a larger unit for more upgrades. Extra capacity also helps with energy efficiency and noise control.