Haswell-E CPU socket

This is Socket 1120-3 for Haswell-E CPUs.


X99 motherboard DDR4 memory slots. There are four additional slots on the other side of the CPU.


Note the barrier or "key" in the slot that aligned with the notch in the memory module. Be careful to properly align the module.

Also, in this photograph, note the CPU alignment markers on the CPU socket (arrow or diamond) upper right, the M.2X4 memory module socket, and the 24-pin motherboard power plug connector. The 24-pin plug only goes in one way - orient the tabs.

Upper is a x16 PCIe slot and a smaller x4 PCIe slot. The key in PCIe slots properly orients any card. This allows the placement of a smaller PCIe card into a larger slot.

Note also the heatsink and heatpipe over the CPU voltage supply just above the x16 PCIe slot.

PCH (South bridge chipset) with a large white heatsink with heatpipe.

SATA ports are to the right of the heatsink.

Many accessory headers are located along the bottom edge of this board. Not all boards are so convenient. ASUS makes a very good board.

Observe the red CMOS reset button at the bottom of the board. Front panel USB2 and USB3 headers are also here. A USB3 plug is twice as long as the USB2 plug, a USB3 port is twice as fast as a USB2 port.

CPU socket showing PnP (Pick and Place) cap. Do not throw this away...ever! You will need to replace it before shipping a motherboard for service.

This is Socket 1120-3 for Haswell-E CPUs.

Note: This photograph is upside-down compared to the above photographs of the LGA-2011-3 socket. But the PnP cap is not upside-down. Why, your CPU may fit with the lettering apparently reversed from the "proper" orientation of the board. Don't let this deceive you. What is up anyway? Where is down?

ASUS' Q-Connector helps sort and install panel cables for power switch, reset switch, and LEDs.

Hard drive showing SATA power and SATA data cable ports.


Note also pins for inserting a "jumper." These most often go unused.

SATA Express power (left three sockets) and SATA device data cable sockets to right.

The SATA Express' SATA data cable ports can be used for more common SATA devices that are not SATA Express devices.

SATA data cable. The 90 degree bend at the end of this SATA cable is helpful in a tight space.

SATA Express plug for SATA Express (SATAe) device. This may be a SATA hard drive, a SATA SSD (Solid State Drive) or a SATA optical drive (Blu-ray/DVD player).

Cooler Master CPU heatsink adjacent to a double fan assembly over memory modules. This is a cool machine but the cables need a little tidying up. The Corsair full-Tower case provides plenty of room to work and allows components to breathe.

Two SATA 3.0 Drives mounted vertically in slot with a lot of room to vent heat.

Fans mounted at the top of a case with a flat top for mounting fans. Is that redundant?

Ventilation fans are typically 120mm or, larger, 140mm.

SATA power and data cables. Note one SATA power cable is serving several SATA hard drives.

A closeup of Corsair's memory module fan assembly shows the dedication to detail that has made Corsair a name respected in PC components.

SATA power and data cables attached to optical drives... SATA is convenient.


The GTX 570 is venerable. PCIe power cables fit PCIe video cards but be certain your power supply has a proper supply of cables for the video card that has fallen in love with you.

Note that the panel header cables have not yet been attached. The header sits, looking bald, in the motherboard's lower right corner.

The massive video card has gobbled up several PCIe slots...such is life.


The 24-pin cable will only fit into the large motherboard socket. Never "hot-plug" motherboard cables. Always turn off and unplug a computer before inserting or removing power cables.

In years past, motherboard cables were color coded by voltage, not anymore. Cables are fashionably black this year and next year Marketing will make them yellow. The engineers scratch their heads at such antics and some miss their slide rules.

Note the flange on the plug. This prevents improper alignment of the plug in all but the most determined hands.






Copyright Ed Ruth 2015.

The book "Building Your Own High Performance Computer - The Big Book of Computer Components and Assembly, is available at: Amazon Kindle

Copyright 2014 Ed Ruth