EVGA Z490 DARK (131-CL-E499)
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Component Legend Descriptions
1. CPU Socket 1200
This is the interface for the Central Processing Unit (CPU), and supports 10
th
Gen. Intel Core i3, i5, i7 and i9 models compatible with the Intel
®
LGA1200
Socket, based on Comet Lake-S architecture.
2. Intel
®
Z490 PCH
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 92 for more in-depth PWM breakdown and PWM
controls within BIOS/UEFI.
These headers also support 12v. DC fans. However, DC 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. PWM/DC Fan Headers
These ports may be used with both DC and PWM fans, and may be controlled
via Smart Fan or manually within the BIOS.
5. DDR4 Memory Slots
The memory slots support up to two 288-pin DDR4 DIMMs in Dual-Channel
mode. Dual-Channel mode will be enabled only upon using two sticks of
supported memory; using one stick of memory will lower the board to Single-
Channel mode, which may significantly lower performance. 64GB of RAM is
supported in a 2x32GB configuration. At the time of this manual’s release, this
motherboard officially supports up to speeds. These speeds cannot
be guaranteed, however, because Intel
®
only certifies the speed of the memory
controller up to 2933MHz for Comet Lake-S processors.