CPU Cooler Check

Intel Core Ultra 200S · LGA1851  /  240 mm AIO liquid cooler

Does the Lian Li Galahad II Trinity 240 fit the Core Ultra 5 245K?

Yes. The Lian Li Galahad II Trinity 240 fits the Core Ultra 5 245K with 101 W of thermal headroom; we estimate 72 °C under sustained load and 51 °C while gaming, an excellent match.

Reviewed by Farrukh Sufyan SarwarHow we estimate temperaturesPublished Prices verified Model v1.2 · data updated

Full load

72°

Gaming

51°

Idle

32°

Excellent fit

Safe at 72 °C full load

28 °C below the 100 °C junction limit under a sustained all-core load.

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The Lian Li Galahad II Trinity 240 is an excellent match for the Core Ultra 5 245K, with 101 W of headroom above its 159 W boost ceiling. We estimate 51 °C in games and 72 °C under a full all-core render, leaving quiet-fan-curve room.

01

Thermal estimate

Both figures assume a 35 °C case-internal ambient and the cooler's sustained rating; the CPU's own junction limit caps the full-load figure.

Estimated core temperature35 °C case ambient
Estimated CPU temperatures for Core Ultra 5 245K with Lian Li Galahad II Trinity 24020°40°60°80°100°TjMax 100 °CIdle: 32 °C32 °CIdleGaming: 51 °C51 °CGamingFull load: 72 °C72 °CFull load
Estimated temperatures
LoadEstimate
Idle32 °C
Gaming51 °C
Full load72 °C
Junction limit100 °C
0–85 % comfortable
85–100 % fans ramp
100 %+ throttles
Thermal headroom
+101 W
CPU boost / gaming draw
159 W / 90 W
Cooler sustained rating
260 W
Junction limit
100 °C
Cooler height
52 mm
RAM clearance
Unrestricted
Sockets in the box
AM4 · AM5 · LGA1200 · LGA1700 · LGA1851
02

What the numbers mean for this build

  • 01

    101 W of sustained headroom

    The Core Ultra 5 245K uses 61 % of the Lian Li Galahad II Trinity 240's rated capacity at its 159 W ceiling, which means the fans can run a relaxed curve and stay quiet even in Cinebench.

  • 02

    240 mm radiator placement

    Mount the radiator with tubes at the bottom (front) or the pump below the top of the radiator (top mount) so air pockets collect away from the pump. Total stack is 52 mm with fans, so check top-mount clearance above the motherboard VRM heatsinks.

03

Will it physically fit?

Drag the sliders to your memory height and case limits. The schematic moves with you and shows where the Galahad II Trinity 240 clashes.

44 mm

Liquid coolers leave the DIMM slots clear.

  • RAM heightFits

    Liquid coolers leave the DIMM slots completely clear.

  • Pump blockFits

    Pump block height is negligible; only the radiator mount matters.

  • Radiator mountFits

    Case supports up to 360 mm radiators; 240 mm fits.

Overall Fits for the Galahad II Trinity 240 with your inputs.

CASE MOUNT 360 mmRADIATOR 240 mm + fans

Schematic, not to product scale.

04

Buy it, or compare the alternatives

Three tiers picked for this exact CPU: the cheapest tower that passes, the quietest liquid option per dollar, and the best low-profile heatsink.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

05

Related reports

Other coolers on the Core Ultra 5 245K

Lian Li Galahad II Trinity 240 on other CPUs

Terms used on this page

Thermal headroom
The cooler's sustained dissipation rating minus the CPU's boost power limit, in watts. Positive headroom lets fans run slower and quieter; 25 W or more is rated Excellent here.
TjMax
The maximum junction temperature the maker allows, typically 95–100 °C. AMD lists 90 °C for the Ryzen 7 5800X3D, 89 °C for the 7800X3D and 95 °C for the 9800X3D. At TjMax the CPU throttles clocks to stay in place; it will not overheat, but it will lose performance.
PL1 / PL2
Intel's two power limits. PL1 (Processor Base Power) is the sustained draw the CPU settles at; PL2 (Maximum Turbo Power) is the short-term boost ceiling. Many desktop boards run PL2 indefinitely, so a cooler must be sized for PL2, not PL1.
Thermal throttling
Automatic clock reduction when the CPU hits TjMax. A pairing is flagged as a throttling risk when the modelled full-load temperature reaches the junction limit or the cooler is rated 15 W or more below the CPU's boost power.
RAM clearance
The tallest memory module that fits under an air cooler's front fan in its stock position. Dual-tower coolers with less than 42 mm clash with tall RGB kits (typically 44 mm) unless the fan is raised.
CPU cooler height
The installed height of an air cooler from the motherboard, compared against the case's published CPU cooler clearance. Coolers at or above 160 mm exclude many compact Micro-ATX and tempered-glass mid-towers.
AIO liquid cooler
A sealed closed-loop liquid cooler with a pump block and a 120–420 mm radiator. Radiator length determines case compatibility; thickness plus fans determines top-mount clearance above the VRM heatsinks.
06

Frequently asked questions

Will the Lian Li Galahad II Trinity 240 keep the Core Ultra 5 245K from thermal throttling?

Yes. The estimated full-load temperature is 72 °C, 28 °C below the 100 °C throttle point.

What temperature should I expect while gaming on the Core Ultra 5 245K with this cooler?

Around 51 °C with a 35 °C case ambient, because GPU-bound games only draw about 90 W from the CPU package. Cooler rooms and better case airflow lower that figure.

What radiator mount does the Lian Li Galahad II Trinity 240 need?

A 240 mm mount in the top or front of the case, with about 52 mm of depth for the radiator and fans.

Is the Lian Li Galahad II Trinity 240 compatible with the LGA1851 socket?

Yes, LGA1851 hardware is included. Supported sockets: AM4, AM5, LGA1200, LGA1700, LGA1851.

Hubs: Core Ultra 5 245K · Lian Li Galahad II Trinity 240 · LGA1851