Use an i9 13900K in combination with the Corsair iCUE H170i Elite LCD 420MM with 6 Noctua NF-A14 140MM 3000RPM fans in push-pull configuration. These can still keep the processor at a maximum of 99°C with a 10-minute FPU stress with Aida64, which is somewhat comparable to Prime95 in terms of load and temperature.
That is with a room temperature of roughly 21°C where the video card is not even warm (GTX1080Ti to 320W).
At peak times, the processor consumed about 310W with an undervolt of -0.04v (Global Core SVID voltage), because it does not reach 100°C, the clock speed then simply remains at 5.5Ghz/4.3Ghz.
It now runs completely stable at an undervolt of -0.06, a friend even has it set to -0.07v without any problems, then the consumption drops to ~280-290W and I think the peak temperatures are around 95°C while in much more realistic normal scenarios I actually don’t see it getting above the beginning of the 80°C degrees in games like GTA V, World of Warcraft and Halo Infinite, of course the wattages are around 90-110W and 100-170W.
That is with the fans at 3000RPM (well, they get 2750~ on the rad) and ~2450RPM for the pump (balanced profile), now the fan profile has been adjusted to about 1750-2250RPM since it doesn’t make much difference anyway at higher speeds but a lot quieter.
I think I was able to achieve peaks of 360-370W via Prime95, but there was no undervolt at the time, but then you quickly hit 100°C and it starts to throttle. The undervolt gives less power consumption, less heat, gives the cooler more space to prevent throttling and you have more net performance.
Even with the -0.06v undervolt managed to get the highest score in Cinebench R23, higher than without undervolt. (single-run 40839 to 40856 points from 300-318W to ~290W).
Now you would say, why such a processor? Been on an i7 3930K (which dates back to 2011) since 2013 but with Windows 10 things have gotten a bit sluggish with everyday use, but it had to use a lot of its max capacity on some games and even Halo Infinite was constantly on 100% with frame rates of 30-60 or even lower, that’s now more than doubled (~100-130+) despite the 1080Ti being loaded at 99% even on low settings (1440P/120 FOV).
The i7 3930K has a TDP of 130W and even at 4.4Ghz overclocking under Windows 10, it was still far from achieving the Windows 7 performance with 3.8Ghz, but it could achieve that consumption where almost full load was required. (up to 180W under FPU stress test).
The i9 13900K is so efficient that it is actually not even inferior in terms of consumption compared to the old processor, in fact it has so much power that you can do much more often with much less power consumption because at idle it also drops to 25W, your games would frame -limits comparable to what the 3930K would reach (whether the 165Hz ceiling is reached with less CPU power) then the final consumption will simply be lower than the old system, so it is not so black and white and completely dependent on the user circumstances.
And you often hear that it is much better to upgrade your video card for gaming, without a good basis as a processor you can still put such a powerful video card in it, but you will sooner run into the problem that the video card cannot be fully utilized and the frame pacing lousy due to hard lag spikes due to limited CPU capacity.
The upgrade from an i7 3930K to 13900K is, despite the 1080Ti, a world of difference both in maximum achievable frame rates and frame pacing that is a lot more consistent / smooth, and where programs used to take time to load, now almost everything is almost instant , with a regular 840 Pro SSD, also starting and running a virtual machine is just tripled in terms of boot times, etc.
And where the old system drew about 600-650W in peak moments, it is more likely to reach 650-700W if you were to put a heavy load on both components, but during gaming more likely 400-550W on the new system, while the old one certainly continued to draw 550W in the heavier games. Good thing that will be more in the future with a heavier GPU, only the games that now draw full power no longer need that on the new one, can also end up lower.
And to think that instead of 7 fans (including CPU) there are now a total of 14 in the system.
[Reactie gewijzigd door CriticalHit_NL op 12 januari 2023 21:07]
