H20-220 "Ultima XT" Series Liquid Cooling Kits

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Bulk shipping information: 4 Pcs/Ctn

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Designed in the USA
ROHS Compliant

The H20-220 "Ultima XT" Series Liquid Cooling Kits continue our long established tradition of bundling our top performing components to produce the best cooling kit the market has to offer.

Featuring what many consider as the world's best water-block, the Award Winning Apogee™ XT, the MCRES-Micro Revision 2, the classic MCP655-B pump and MCR220 dual 120mm radiator, the Ultima XT receives yet another quantum boost in both performance and versatility.

As a result of the substantial cooling headroom afforded by this combination of top performance components the Ultima XT kit will satisfy both extremes of the enthusiast market spectrum:
  • Overclockers in search of the lowest CPU temperatures AND Silent computing users in search of the lowest possible operating noise
Whereas an increasing number of cases can now accommodate dual 120mm radiators internally, users convenience was not forgotten, and the Ultima XT is shipped standard with our MCB120 "Radbox" Revision 2 which allows the radiator to be bolted-on at the back of practically any mid-or full tower cases. Overall thermal performance also clearly benefits from the use of our Radbox, demonstrated in a number of field tests .

The Kit comes in two versions:
  • H20-220 Ultima XT, for CPU cooling only and
  • H20-220 Ultima XT Plus, a complete system cooling solution, including CPU, GPU, and Chipset water-blocks.
The Ultima XT Plus includes everything that comes in the Ultima XT, "Plus" the MCW82 VGA waterblock, GT400 adapter, MC14 Ramsinks, MC21 Mosfet heatsinks, and MCW30 Chipset water-block.

Important notification to users: while the kit's CPU and GPU coolers are mostly universal with respect to mainstream components, there are too many variations among chipset retention mechanisms to establish a compatibility list. Users are advised to measure the distance between mounting points and/or check the existing retention mechanism on their particular motherboard, and check for compatibility against the MCW30 published data here.

Tab 1


Capturing the heat

  • The world's most advanced Apogee™ XT water-block is responsible for absorbing the heat generated by today's hottest CPU's with incredible efficiency.
  • Adjustable fan speed: the kit is delivered with 12V to 7V and 12V to 5V fan adapters, enabling users to reduce the fan speed -and noise, to whisper quiet operations (~25 dBA).

Moving the Heat around

  • The Extreme performance MCP655-B 12 Volts DC industrial pump pushes the coolant throughout the circuit at high velocity.
  • Larger 1/2" ID (3/4" OD) tubing is used to maximize the coolant flow rate inside the system.

Dissipating the heat into the atmosphere

Minimum toll on performance in "silent" mode

  • The MCR-220 QP copper and brass radiator doubles the surface area available for heat convection into the air compared to a single 120mm radiator, and uses two 72 CFM 120mm fans, at a reasonable* sound noise level of 37 dBA.
  • The MCB120 "Radbox" Revision 2 optimizes cooling by using fresh air from outside the computer, without adding any thermal load to other components.
  • The MCR-220 QP radiator fin density is optimized to reduce air noise and operate at high efficiency with low-flow fans.
  • At the lowest fan speed settings, the Ultima kit still delivers superb performance while allowing substantial overclocking. For example, at 100 Watts, the CPU temperature is only 3 °C higher than at the highest fan settings

Convenience and reliability features

  • Kit noise/performance ratio can be fine-tuned at the user leisure.
  • The 12 Volt DC MCP655-B pump plugs directly into computer power supply.
  • High-reliability, no-maintenance industrial pump is rated at 50,000 hour MTBF(Mean Time Between Failure) equivalent to 5 year lifetime.
  • The MCRES-Micro Revision 2 reservoir fits in any small space available in the system without sacrificing a CD-drive bay and can provides up to 18 month of continuous operations without refills.
  • An additional fill-port provides installation versatility by offering users multiple tube routing options and elaborate mounting brackets allow installation just about anywhere in the PC.
  • Optional remote fill-ports are also available to further enhance the versatility of the installation.
  • The Apogee™ XT water-block is compatible with all current Intel® desktop processors.
  • The MCR-220 QP radiator is completely self-bleeding in upright position, or when installed on it's side.
  • The MCB-120 "Radbox" Revision 2 provides a bolt-on mechanism to "hang" the radiator at the back of the case with minimum case modifications.

    *For reference, stock cooling solutions for current high-end CPU's are specified by manufacturers between 34 and 38 dBA.

Tab 2

Radiator/Fan configuration
Estimated average CPU Temp

Intel® Core i7 920 @ 4095Mhz & 1.392v at 22 °C ambient air
Fan Noise, dBA
(per specs, and est.*)
1 radiator x 2 120mm fans @ 12V
66.1 °C
1 radiator x 2 120mm fans @ 7V
69.5 °C
1 radiator x 2 120mm fans @ 5V
72.8 °C
* Fan noise estimate based on: "If the speed of a fan is reduced by 20%, the decibel level will reduce by 5 dB.", and "addition of a second equal source increases the sound level by ~3dBA".

Tab 3

Part Number
Apogee™ XT water-block, including 1/2" fittings & mounting hardware
MCR220 QP radiator, including 1/2" fittings & mounting hardware
MCP655-B 12 Volts DC pump, built-in fittings, & mounting hardware
MCRES-Micro Revision 2 reservoir, inl. 1/2" fittings & Mounnting Hardware
MCB120 "Radbox" radiator mounting adapter, including mounting hardware
1/2" ID x 3/4" OD tubing (6')

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HydrX coolant

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Fans, including fan guards, 5V adapter, and 7V adapter

See below

MCW82 VGA cooling kit (Ultima Plus version)
MCW30 chipset water-block (Ultima Plus version)


The MCR220-QP Radiator as delivered, including fans, fan guards, and 1/2" fittings:
Fan Specifications:
Bearing type: sleeve bearing (for low noise)
MTBF: 40,000 Hrs

Mfgr Model
RDM1225S @ 12 V
.23 2000 2.7 81.3 ~36


Tab 4

Platform Compatibility

  • All Intel® Core Desktop processor family (Core2, Quad, Duo, Extreme, i5, i7) in socket 775, 1155/1156 and 1366 form factors.
  • Intel® Server processor family (Xeon ) in socket 603, 604 and 771 form factors (free hold-down plate sent factory-direct on demand worldwide)
  • AMD® processors in their respective socket form factors - 754, 939, F, AM2 and AM3 (free hold-down plate sent factory-direct on demand worldwide)
Installation Guides

APEX ULTIMA XT English Installation Guide
APEX ULTIMA XT French Installation Guide
APEX ULTIMA XT PLUS English Installation Guide
APEX ULTIMA XT PLUS French Installation Guide

Tab 5

Browse thru the numerous reviews published over the years here

End User Reviews

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