Quick Answer

AIO cooler socket compatibility terms refer to the physical connector interface between the CPU and motherboard. The four current mainstream sockets are AM5 (AMD Ryzen 7000/9000), AM4 (AMD Ryzen 5000 and earlier), LGA1851 (Intel Core Ultra 200-series), and LGA1700 (Intel 12th to 14th gen). Each requires specific mounting hardware, though AM5/AM4 share the same hole spacing, as do LGA1851/LGA1700.

The Four Current Sockets and What They Mean 🔧

AM5 is AMD's current platform, used by Ryzen 7000-series (Zen 4) and Ryzen 9000-series (Zen 5) processors. The socket uses land-grid array (LGA) contacts on the motherboard rather than pins on the CPU, a departure from AMD's historical pin-on-CPU design. AM4 is the previous AMD platform, covering Ryzen 1000 through 5000-series, and remains active in the market due to the enormous installed base of budget and mid-range builds. LGA1851 is Intel's current socket for Core Ultra 200-series (Arrow Lake) processors, and LGA1700 covers Intel's 12th, 13th, and 14th-generation Alder Lake, Raptor Lake, and Raptor Lake Refresh chips. SA builders on Ryzen 9000-series or Core Ultra 200-series use AM5 and LGA1851 respectively; anyone upgrading from an older system may be on AM4 or LGA1700.

Mounting Hardware Terminology Decoded 🔩

AIO cooler mounting kits include a backplate, standoffs (threaded posts that attach to the backplate), and a mounting bracket that attaches to the cold plate and tightens onto the standoffs.

Less Common Sockets You May Encounter 📋

Beyond the four main sockets, some AIO coolers also list compatibility with TR5 (AMD Threadripper 7000-series, a large workstation socket), sTRX4 (older Threadripper), and LGA2066 (Intel X-series, largely discontinued). These are workstation and high-end desktop (HEDT) platforms that require entirely different mounting hardware and typically cannot use the standard AIO cold plate due to their much larger IHS footprint. If you are building a Threadripper workstation, you need an AIO specifically designed for TR5, not a standard AM5/LGA1851 unit.

TIP

Socket Verification Before Installing ⚡

Before you even open your cooler's mounting kit, run CPU-Z on your existing system or check your CPU's box to confirm the exact socket. AM5 and LGA1700 motherboards look similar at a glance but use completely different mounting hardware. Installing the wrong backplate on LGA1700 versus LGA1851 can result in incorrect clamping force and poor thermal contact even if the screw holes physically align.

FAQ

Why does AM5 need different hardware if it shares the same hole spacing as AM4?

AM5 changed from a pin-on-CPU (PGA) to a contact-on-board (LGA) design. While the PCB hole spacing is the same, the socket height and spring tension requirements differ. Using AM4 mounting hardware on AM5 can result in insufficient cold plate pressure on the CPU's new LGA-style IHS, leading to higher than expected temperatures.

What does "LGA" stand for and why does it matter?

LGA stands for Land Grid Array. It describes a socket design where the contact pins are on the motherboard socket rather than the CPU package. Intel has used LGA since the mid-2000s; AMD adopted it with AM5 in 2022. LGA designs are generally considered more durable since CPU pins (which bend easily) are replaced by flat contacts, but the motherboard socket becomes more vulnerable to damage if a CPU is mishandled during installation.

Can a single universal mounting kit really support all four current sockets?

Yes. Because AM5 and AM4 share hole spacing, and LGA1851 and LGA1700 share hole spacing, a cooler with two mounting kit variants (one AMD, one Intel) covers all four platforms. The differences are in backplate design and standoff height, not in completely separate systems.

Not sure which socket your next build uses? Evetech lists every CPU cooler with its full socket compatibility table, so you can match the cooler to your platform before purchasing.