EVGA Z390 FTW User Manual page 13

EVGA Z390 FTW (123-CS-E397)
Component Legend Descriptions
1. CPU Socket 1151
This is the interface for the Central Processing Unit (CPU), and supports Core
i3, i5, and Core i7 models compatible with the Intel
Lake-S architecture.
2. Intel Z390 PCH (Southbridge)
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The Platform Controller Hub (PCH) handles the role that was previously held
by the South Bridge. The PCH has 4 PCIe Gen 3 lanes and allocates bandwidth
to smaller PCIe slots, M.2, USB, audio, etc. In simplified terms, the PCH works
as a hub for peripherals that are less bandwidth-intensive.
3. PWM Fan Headers
4-pin fan headers that control the fan speed based on a configurable curve or
static percentage. PWM (Pulse-Width Modulation) works by pulsing power to
the fan at a constant rate and sending the RPM signal to the fan's controller via
a Sense cable, rather than adjusting fan speed by increasing and decreasing
voltage. This method is preferable because it eliminates voltage-based fan stall
points. Please see Page 86 for more in-depth PWM breakdown and PWM
controls within BIOS/UEFI.
These headers also support 12v. fans. However, fan speed is based on
decreasing voltage to the fan, starting at a default of 100%/12V. When using a
12v. fan, the minimum speed will vary depending on the motor because most
fan motors require a set amount of voltage before stalling.
4. DDR4 Memory Slots
The memory slots support up to four 288-pin DDR4 DIMMs in Dual-Channel
mode. Dual-Channel mode will be enabled only upon using two or four sticks
of supported memory, according to the installation guide above; using one or
three sticks of memory will lower the board to Single-Channel mode, which
may significantly lower performance. Some Quad-Channel kits *MAY* work;
however, the kit will continue to run in Dual-Channel mode due to the
limitations of the CPU's memory controller. 64GB of RAM is supported in a
4x16GB configuration; 32GB modules are *NOT* officially supported. At the
time of this manual's release, this motherboard officially supports up to
4133MHz+ speeds. These speeds cannot be guaranteed, however, because
Intel only certifies the speed of the memory controller up to 2666MHz for
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Coffee Lake-S processors.
1151 Socket and Coffee
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