The i9 9980XE packs 18 cores into Intel’s LGA 2066 high-end desktop socket, and Intel ships it without any cooler. Finding a current cooler that still lists LGA 2066 is harder than it sounds. This guide to the best CPU coolers i9 9980XE workstations can use covers six options with verified LGA 2066 support.
Quick verdict
For a 9980XE workstation, the Noctua NH-D15S chromax.black is the strongest pick here: a 160mm dual tower with a 140mm fan and LGA 20xx support via Noctua’s NM-i20xx kit, about $110 on Amazon US as of November 2026. On a budget, the Thermalright Peerless Assassin 120 lists LGA 2066 for about $34.
| Cooler | Type | Height or radiator | Fans | LGA 2066 support | Best for | Amazon US price, Nov 2026 |
|---|---|---|---|---|---|---|
| Noctua NH-D15S chromax.black | Asymmetric dual tower | 160mm | 1 x 140mm | Square ILM with NM-i20xx | Quiet heavy workloads | about $110 |
| Thermalright Peerless Assassin 120 | Dual tower | 157mm | 2 x 120mm (listing) | Yes, in the box per maker | Best value | about $34 |
| Thermalright Phantom Spirit 120 EVO | Dual tower | 157mm | 2 x 120mm, 2,150 RPM | Yes, per listing | More airflow headroom | about $47 |
| Noctua NH-U12A chromax.black | Single tower, dual fan | 158mm | 2 x 120mm | Square ILM with NM-i20xx | Narrower premium option | about $120 |
| Noctua NH-U12S chromax.black | Single tower | 158mm | 1 x 120mm | Square ILM with NM-i20xx | Light-duty or stock use | about $100 |
| Cooler Master MasterLiquid ML240L RGB V2 | 240mm AIO | 277 x 119.6 x 27.2mm | 2 x 120mm | Yes, per listing | Liquid with listed 2066 support | about $90 |
How we selected LGA 2066 coolers
This is a research-based guide, not a lab test. We searched Amazon US listings collected on November 11, 2026, and kept only coolers whose listing or manufacturer page names LGA 2066 or LGA 20xx. Many popular current coolers dropped the socket, so the list is shorter than usual.
Intel’s specification page lists the i9-9980XE at 18 cores and 36 threads, a 3.0GHz base, a 4.4GHz turbo and 4.5GHz with Turbo Boost Max 3.0, a 165W TDP and an 84C junction limit. That 84C figure is lower than the 100C limit on many desktop chips, which leaves less room before throttling.
We excluded several coolers after checking the details. Thermalright’s Frozen Notte 240 Black ARGB V2 listing stops at LGA 1700 and 1851 with no LGA 2066, and the Frozen Warframe 360 SE lists only LGA 115x through 1851. We found no 360mm AIO in our data with verified LGA 2066 support and a meaningful ratings base.
Best CPU coolers i9 9980XE builds can mount
The six picks are ordered by suitability for sustained 18-core loads. Each section covers who the cooler suits, verified specs, how it mounts on LGA 2066 and the trade-offs. Ratings and prices come from Amazon US as of November 2026. Check your board’s retention type before you order any of them.
Noctua NH-D15S chromax.black
The NH-D15S chromax.black is the pick for a 9980XE that renders, compiles or simulates for hours. It is the largest heatsink in this guide, and its single 140mm fan can move a lot of air at low speed, which suits workstations that run under heavy load but share a room with people.
The Amazon listing gives a 160mm height, six heat pipes and one NF-A15 140mm PWM fan with a Low-Noise Adaptor, rated up to 1,500 RPM. Its asymmetric layout leaves 65mm of RAM clearance and avoids the top PCIe slot on most boards, which helps on X299-class boards with eight DIMM slots around the socket.
Noctua’s compatibility table on the listing marks LGA 20xx square ILM as supported with its NM-i20xx kit, and narrow ILM as unsupported. Confirm whether the kit is in your box. It was listed around $110 on Amazon US and rated 4.8 out of 5 from about 2,100 ratings as of November 2026, with a six-year warranty.
- Pro: largest air cooler here, with a quiet 140mm fan
- Pro: 65mm RAM clearance on crowded boards
- Pro: six-year warranty and room to add a second fan
- Con: LGA 2066 mounting depends on the NM-i20xx kit
- Con: not compatible with narrow ILM boards
Buy if you want quiet, pump-free cooling for long all-core workloads and have a square ILM board. Skip if your case clears less than about 165mm.
Thermalright Peerless Assassin 120
The Peerless Assassin 120 is the value pick. Unlike the newer SE version, Thermalright’s page for this original model lists LGA 2011, 2011-3 and 2066 directly, so no extra kit is needed. It suits 9980XE owners who want a big dual tower for very little money on an older workstation.
Thermalright lists 125 x 135 x 157mm, 750 grams, six 6mm heat pipes and TL-C12 120mm PWM fans rated at 1,550 RPM, 66.17 CFM and 25.6 dBA. The Amazon title describes two fans. The page does not state a warranty term; it links to a general Thermalright warranty page instead.
Socket support on the manufacturer page covers Intel 115x, 2011, 2011-3, 2066, 1200, 1700 and 1851 plus AM4 and AM5. It was listed around $34 on Amazon US and rated 4.7 out of 5 from about 500 ratings as of November 2026, a fraction of the Noctua prices.
- Pro: LGA 2066 listed by the manufacturer
- Pro: dual tower for about a third of Noctua’s price
- Pro: moves to current Intel and AMD sockets later
- Con: warranty term not stated
- Con: 1,550 RPM fans limit peak airflow for heavy all-core work
Buy if you want strong cooling on a budget and need LGA 2066 hardware in the box. Skip if quiet operation under sustained load matters more than cost.
Thermalright Phantom Spirit 120 EVO
The Phantom Spirit 120 EVO is the higher-airflow alternative to the Peerless Assassin. Its seventh heat pipe and much faster fans give more headroom for long all-core loads on an 18-core chip, at the cost of extra noise when the fans run near their maximum speed.
The Amazon listing gives 125 x 135 x 157mm with fans, seven 6mm heat pipes and two TL-K12 120mm PWM fans rated at 2,150 RPM, 69 CFM and 27 dBA. The listing says Thermalright provides mounting plates or fasteners for each platform it supports, so LGA 2066 hardware should be in the box.
The listing’s socket support covers Intel LGA 1700, 1150, 1151, 1155, 1156, 1200, 2011 and 2066 plus AM4 and AM5, and the title adds LGA 1851. It was listed around $47 on Amazon US and rated 4.8 out of 5 from about 520 ratings as of November 2026.
- Pro: seven heat pipes and the fastest fans here
- Pro: LGA 2066 named on the listing
- Pro: high Amazon rating
- Con: louder at full speed than the Noctua picks
- Con: warranty not stated on the listing
Buy if you want the most air-cooling headroom per dollar for an 18-core chip. Skip if noise under load is your main concern.
Noctua NH-U12A chromax.black
The NH-U12A chromax.black suits 9980XE builds where a 140mm-class dual tower is too wide, such as boards with tall RAM in all eight slots or cases with tight side panels. It packs seven heat pipes and two fans into a 120mm-wide tower, which Noctua says rivals many 140mm coolers.
The Amazon listing gives 158mm of height and two NF-A12x25 120mm PWM fans with Low-Noise Adaptors, rated up to 2,000 RPM, plus NT-H1 paste and SecuFirm2 mounting. A retailer spec page lists seven heat pipes. The slim footprint does not overhang RAM on most current boards.
Noctua’s compatibility table for the NH-U12A marks LGA 20xx square ILM as supported with the NM-i20xx kit and narrow ILM as unsupported. It was listed around $120 on Amazon US and rated 4.8 out of 5 from about 2,800 ratings as of November 2026, with a six-year warranty.
- Pro: high capacity in a narrow 120mm tower
- Pro: two quiet NF-A12x25 fans
- Pro: six-year warranty
- Con: most expensive pick here
- Con: LGA 2066 depends on the NM-i20xx kit
Buy if you need a narrow, quiet tower with real capacity. Skip if your case and RAM allow the NH-D15S, which costs less.
Noctua NH-U12S chromax.black
The NH-U12S chromax.black is for 9980XE systems that run mostly light or bursty work, such as development machines, or are kept at stock settings with modest all-core loads. It is quieter and smaller than the larger coolers above but has less capacity for hours of 18-core rendering.
The Amazon listing gives a 158mm height, five heat pipes and one NF-F12 120mm PWM fan with a Low-Noise Adaptor. It is designed not to overhang RAM or block the first PCIe slot on most ATX and Micro-ATX boards, and it accepts a second fan for push-pull if you need more airflow later.
Its compatibility table marks LGA 20xx square ILM as supported with NM-i20xx and narrow ILM as unsupported. It was listed around $100 on Amazon US and rated 4.9 out of 5 from about 5,800 ratings as of November 2026, the highest rating in this guide, with a six-year warranty.
- Pro: highest Amazon rating here
- Pro: quiet and compact
- Pro: optional second fan
- Con: least capacity of the picks for sustained 18-core loads
- Con: costs nearly three times the Peerless Assassin
Buy if the workstation mostly idles or runs short bursts and quiet is the priority. Skip if you render or simulate for long periods.
Cooler Master MasterLiquid ML240L RGB V2
The ML240L RGB V2 is the liquid option for a 9980XE whose case or board makes a large tower awkward. Its listing names LGA 2066 and LGA 2011-v3 directly, which few current AIOs do, and it has the largest ratings base of any AIO in our Amazon US data set from November 2026.
The Amazon listing gives a 277 x 119.6 x 27.2mm radiator, two SickleFlow 120mm RGB PWM fans rated up to 1,800 RPM and a third-generation dual-chamber pump. Lighting is RGB rather than addressable, so check your header type. A 240mm radiator is a modest size for 18 cores under long all-core loads.
Intel support covers LGA 2066, 2011-v3, 2011, 1366, 1200, 1151, 1150, 1155 and 1156, plus LGA 1700 with a separate kit, and AMD AM4 and older sockets. It was listed around $90 on Amazon US and rated 4.6 out of 5 from about 9,600 ratings as of November 2026, with a two-year warranty.
- Pro: LGA 2066 named directly on the listing
- Pro: very large ratings base
- Pro: frees space around the socket and RAM
- Con: 240mm capacity is limited for sustained 18-core work
- Con: two-year warranty and no AM5 support listed
Buy if you want liquid cooling and a cooler that clearly lists LGA 2066. Skip if your case fits the NH-D15S, which offers more capacity without a pump.
Buying guide for an i9 9980XE cooler
Cooling an 18-core HEDT chip is about sustained heat, mounting hardware and case space. Confirm the socket kit first, then size the cooler for long all-core loads rather than short bursts, and check clearance around eight DIMM slots. The sections below draw on the specs gathered for the picks above.
Sizing the best CPU coolers i9 9980XE loads need
Intel rates the 9980XE at 165W TDP with an 84C junction limit. Long renders and compiles keep all 18 cores busy, so pick for sustained load: the NH-D15S, Phantom Spirit 120 EVO or Peerless Assassin 120 first, with the NH-U12S reserved for lighter use.
We found no verified temperature tests for these coolers on a 9980XE, and we did not find a sourced figure for its power draw when overclocked. If you plan to overclock heavily, treat every cooler here as a starting point and watch temperatures closely against the 84C limit.
LGA 2066 mounting and ILM type
LGA 2066 boards use an integrated retention mechanism, or ILM, in either a square or narrow layout. Noctua’s tables list square ILM as supported with the NM-i20xx kit and narrow ILM as unsupported for the three Noctua picks. Check your motherboard manual for the ILM type before buying.
The Thermalright towers and the ML240L list LGA 2066 or LGA 2011 directly. On these sockets the cooler screws into threaded posts on the ILM rather than using a backplate, so make sure the right standoffs are included and tighten evenly in a cross pattern.
Case and RAM clearance
Heights here run from 157mm to 160mm. Many full-size cases suit HEDT builds: Fractal lists the Meshify 2 at 185mm of cooler clearance, Lian Li lists the Lancool III at 187mm and Fractal lists the Torrent at 188mm. Older or compact cases may not clear 160mm, so check first.
X299-class boards often place DIMM slots on both sides of the socket. Narrow towers such as the NH-U12A and the asymmetric NH-D15S, with 65mm of RAM clearance, reduce conflicts. For the ML240L, confirm a 240mm mount in the front or top of the case.
Noise, warranty and budget
Faster fans give more headroom but more noise. The Phantom Spirit 120 EVO fans reach 2,150 RPM, while the Noctua fans top out between 1,500 and 2,000 RPM. Set a PWM fan curve that ramps on CPU temperature so the workstation stays quiet at idle and between jobs.
Noctua gives six years of warranty, the ML240L listing gives two years, and Thermalright did not state a term on the pages we checked. Prices run from about $34 to $120 as of November 2026, small next to the cost of an 18-core workstation.
FAQ
These answers cover what 9980XE owners ask when replacing or upgrading a cooler. They rely on Intel’s specification page and the manufacturer data gathered above, so they line up with the picks and the buying guide rather than general advice written for mainstream desktop sockets.
Does the i9 9980XE come with a cooler?
No. Intel’s specification page states that the boxed i9-9980XE does not include a fan or heatsink. You need a cooler that supports LGA 2066, which rules out many current models that only list LGA 1700, LGA 1851, AM5 and AM4 sockets on the box or listing.
Can I use an LGA 2011 cooler on LGA 2066?
Usually, if it supports the square ILM, because coolers for LGA 2011 and 2011-3 are commonly listed together with LGA 2066, as on Thermalright’s Peerless Assassin 120 page. Check the specific cooler’s compatibility list, and confirm whether your board uses a square or narrow ILM.
Is a 240mm AIO enough for an i9 9980XE?
For stock use with mixed workloads it can be, but 240mm is a modest radiator for 18 cores under hours of all-core load. A large air cooler such as the NH-D15S offers more capacity in this list. We found no 360mm AIO with verified LGA 2066 support and a solid ratings base.
Conclusion
Buy the Noctua NH-D15S chromax.black for an i9 9980XE workstation, after confirming your board uses a square ILM and that you have the NM-i20xx kit. It is the largest, quietest cooler here for sustained 18-core work. If budget matters, the Thermalright Peerless Assassin 120 lists LGA 2066 in the box for about $34.
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