EVGA Z590 FTW WIFI (121-RL-E597)
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There are four tiers of temp control, with Level 4 fan speeds generally recommended to
be set at Max. The example above uses a fairly aggressive fan curve, but you can set this
as high or low as you wish. Make sure, however, to stay below 5-10C of the Max safe
load temp for your specific processor, which can be found at Ark.Intel.com. All Smart
Fan Settings have the same controls and can be setup the same way.
When monitoring temperatures vs. fan speed, you may notice a variance in ramp
up/down temps; this is due to a function EVGA hardcodes into the BIOS called
Hysteresis. Hysteresis builds in a buffer to control fan speed behavior. This feature
prevents a constant ramp up/down from happening when your system sits exactly at the
temp you set for SMART fan controls. For example, if your setting is at 30C and you hit
31C, the fan will ramp up and cool down to 29C, letting the fan slowdown, which lets
the system heat back up to 31C again, repeating indefinitely and causes the system to
sound like it’s breathing. Hysteresis adds a 4C +/- buffer for CPU and PWM, and 2C
+/- for SYS. This means that once a fan based on the CPU or PWM temp brings you
down to 30C, it will not ramp back up until 34C, so you have a buffer. If you base the
fan control on the SYS temp, you will only see 2C variance.
