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itemId=nf2099-ekwb-ek-fc-terminal-x3-s-typeii-plexi|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=EKWB EK-FC Terminal X3 S (Type II) - Plexi|~|brand=EK Water Blocks|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=39.88|~|priceReg=44.89|~|priceSale=39.88|~|image=https://sep.yimg.com/ay/outletpc/ekwb-ek-fc-terminal-x3-s-type-ii-plexi-28.jpg

EKWB EK-FC Terminal X3 S (Type II) - Plexi

$44.89
$39.88
itemId=wf7231-xspc-raystorm-pro-waterblock-amd-am4-black|~|priceRange=1|~|orderable=T|~|orderCount=4|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Pro WaterBlock (AMD AM4) Black|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=5|~|ratingCount=4|~|price=69.23|~|priceReg=77.42|~|priceSale=69.23|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-pro-waterblock-amd-am4-black-155.jpg
4 Reviews

XSPC RayStorm Pro WaterBlock (AMD AM4) Black

  • High Performance Copper Base
  • G1/4" Threads
  • CNC Cut Acetal Top with Liquid Window
  • 2x 3mm LED holes with twin white LEDs
  • Supports AMD sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+
$77.42
$69.23
itemId=il8772-xspc-raystorm-cpuapu-waterblock-amd-am4-v3|~|priceRange=1|~|orderable=T|~|orderCount=2|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm CPU/APU WaterBlock (AMD AM4) V3|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=59.29|~|priceReg=77.78|~|priceSale=59.29|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-cpu-apu-waterblock-amd-am4-v3-155.jpg

XSPC RayStorm CPU/APU WaterBlock (AMD AM4) V3

  • High Performance Copper Base 56x56x3mm
  • G1/4" Threads
  • CNC Cut Acetal Top
  • 4x 3mm LED Holes
  • Supports AMD sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2
$77.78
$59.29
itemId=ta1446-xspc-raystorm-pro-rgb-waterblock-amd-am4-black|~|priceRange=1|~|orderable=T|~|orderCount=3|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Pro RGB WaterBlock (AMD AM4) Black|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=79.98|~|priceReg=82.39|~|priceSale=79.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-pro-rgb-waterblock-amd-am4-black-139.jpg

XSPC RayStorm Pro RGB WaterBlock (AMD AM4) Black

  • High Performance Copper Base
  • G1/4" Threads
  • CNC Cut Acetal Top with Liquid Window
  • 2x 2x5x5mm RGB LED Holes
  • Supports AMD Sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2
$82.39
$79.98
itemId=lf0979-xspc-raystorm-neo-waterblock-amd-am4-black-chrome|~|priceRange=1|~|orderable=T|~|orderCount=1|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Neo WaterBlock (AMD AM4) Black Chrome|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=4|~|ratingCount=1|~|price=77.98|~|priceReg=84.63|~|priceSale=77.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-neo-waterblock-amd-am4-black-chrome-152.jpg
1 Review

XSPC RayStorm Neo WaterBlock (AMD AM4) Black Chrome

  • High Performance Copper Base 56x56x3mm
  • High quality acrylic top with solid aluminium bracket
  • RGB LED Lighting (x2)
  • G1/4" Threads
  • Supports AMD sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+
$84.63
$77.98
itemId=mm4183-xspc-raystorm-neo-waterblock-amd-am4-chrome|~|priceRange=1|~|orderable=T|~|orderCount=0|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Neo WaterBlock (AMD AM4) Chrome|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=77.98|~|priceReg=84.63|~|priceSale=77.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-neo-waterblock-amd-am4-chrome-140.jpg

XSPC RayStorm Neo WaterBlock (AMD AM4) Chrome

  • High Performance Copper Base
  • High quality acrylic top with solid aluminium bracket
  • RGB LED Lighting (x2)
  • G1/4" Threads
  • Supports AMD sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+
$84.63
$77.98
itemId=pq4015-xspc-raystorm-neo-waterblock-intel-chrome|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Neo WaterBlock (Intel) Chrome|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=77.98|~|priceReg=84.63|~|priceSale=77.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-neo-waterblock-intel-chrome-118.jpg

XSPC RayStorm Neo WaterBlock (Intel) Chrome

  • High Performance Copper Base
  • High quality acrylic top with solid aluminium bracket
  • RGB LED Lighting (x2)
  • G1/4" Threads
  • Supports Intel sockets LGA2066, LGA2011, LGA2011-3, LGA1366, LGA1150, LGA1151, LGA1155, LGA1156
$84.63
$77.98
itemId=qa6596-coollaboratory-alpheos-liquid-cooler-amd-edition|~|priceRange=1|~|orderable=T|~|orderCount=0|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=Coollaboratory Alpheos Liquid Cooler Water Block - AMD Edition|~|brand=Coollaboratory|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=69.28|~|priceReg=87.92|~|priceSale=69.28|~|image=https://sep.yimg.com/ay/outletpc/coollaboratory-alpheos-liquid-cooler-water-block-amd-edition-17.jpg

Coollaboratory Alpheos Liquid Cooler Water Block - AMD Edition

$87.92
$69.28
itemId=rx2437-coollaboratory-alpheos-liquid-cooler-intel|~|priceRange=1|~|orderable=T|~|orderCount=1|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=Coollaboratory Alpheos Liquid Cooler CPU Water Block - Intel Edition|~|brand=Coollaboratory|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=69.28|~|priceReg=87.92|~|priceSale=69.28|~|image=https://sep.yimg.com/ay/outletpc/coollaboratory-alpheos-liquid-cooler-cpu-water-block-intel-edition-14.jpg

Coollaboratory Alpheos Liquid Cooler CPU Water Block - Intel Edition

$87.92
$69.28
itemId=mf2059-ekwb-eksupremacy-evo-acetal--nickel|~|priceRange=1|~|orderable=T|~|orderCount=5|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=EKWB EK-Supremacy EVO - Acetal + Nickel|~|brand=EK Water Blocks|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=4|~|ratingCount=4|~|price=96.98|~|priceReg=105.78|~|priceSale=96.98|~|image=https://sep.yimg.com/ay/outletpc/ekwb-ek-supremacy-evo-acetal-nickel-142.jpg
4 Reviews

EKWB EK-Supremacy EVO - Acetal + Nickel

  • Unmatched Thermal Performance - more than 2.2°C better performance on most popular LGA-1150 & LGA-2011 processors.
  • Very High-Flow Design - low hydraulic restricion allows this product to be used in setups using weaker water pumps.
  • Modular Design - using various inserts and jets the performance can be further fine-tuned to unleash maximum performance by ensuring the optimal contact with the CPU integrated heat spreader (IHS).
  • Nickel Acetal
  • AMD & Intel Sockets
$105.78
$96.98
itemId=kk5080-xspc-raystorm-pro-waterblock-intel-black|~|priceRange=1|~|orderable=T|~|orderCount=1|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Pro WaterBlock (Intel) Black|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=4.5|~|ratingCount=3|~|price=79.89|~|priceReg=109.78|~|priceSale=79.89|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-pro-waterblock-intel-black-220.jpg
3 Reviews

XSPC RayStorm Pro WaterBlock (Intel) Black

  • High Performance Copper Base
  • G1/4" Threads
  • CNC Cut Acetal Top with Liquid Window
  • 2x 3mm LED holes with twin white LEDs
  • Supports Intel Sockets 1150, 1151, 1155, 1156, 1366, 2011 and 2011-3
$109.78
$79.89
itemId=pe7001-xspc-raystorm-pro-waterblock-intel-white|~|priceRange=1|~|orderable=T|~|orderCount=2|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Pro WaterBlock (Intel) White|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=74.82|~|priceReg=109.78|~|priceSale=74.82|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-pro-waterblock-intel-white-260.jpg

XSPC RayStorm Pro WaterBlock (Intel) White

  • High Performance Copper Base
  • G1/4" Threads
  • CNC Cut Acetal Top with Liquid Window
  • 2x 3mm LED holes with twin white LEDs
  • Supports Intel Sockets 1150, 1151, 1155, 1156, 1366, 2011 and 2011-3
$109.78
$74.82
itemId=va4776-xspc-raystorm-pro-waterblock-intel-red|~|priceRange=1|~|orderable=T|~|orderCount=2|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Pro WaterBlock (Intel) Red|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=2.5|~|ratingCount=5|~|price=69.89|~|priceReg=109.78|~|priceSale=69.89|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-pro-waterblock-intel-red-272.jpg
5 Reviews

XSPC RayStorm Pro WaterBlock (Intel) Red

  • High Performance Copper Base
  • G1/4" Threads
  • CNC Cut Acetal Top with Liquid Window
  • 2x 3mm LED holes with twin white LEDs
  • Supports Intel Sockets 1150, 1151, 1155, 1156, 1366, 2011 and 2011-3
$109.78
$69.89
itemId=bw0250-xspc-raystorm-neo-waterblock-intel-black-chrome|~|priceRange=1|~|orderable=T|~|orderCount=2|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Neo WaterBlock (Intel) Black Chrome|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=92.98|~|priceReg=114.63|~|priceSale=92.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-neo-waterblock-intel-black-chrome-139.jpg

XSPC RayStorm Neo WaterBlock (Intel) Black Chrome

  • High Performance Copper Base 56x56x3mm
  • High quality acrylic top with solid aluminium bracket
  • RGB LED Lighting (x2)
  • G1/4" Threads
  • Supports Intel sockets LGA2066, LGA2011, LGA2011-3, LGA1366, LGA1150, LGA1151, LGA1155, LGA1156
$114.63
$92.98
itemId=wm2374-alphacool-eisblock-xpx-cpu-intelamd--silver-matte|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=Alphacool Eisblock XPX CPU - Intel/AMD - Silver Matte|~|brand=Alphacool|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=5|~|ratingCount=5|~|price=74.57|~|priceReg=116.07|~|priceSale=74.57|~|image=https://sep.yimg.com/ay/outletpc/alphacool-eisblock-xpx-cpu-intel-amd-silver-matte-142.jpg
5 Reviews

Alphacool Eisblock XPX CPU - Intel/AMD - Silver Matte

  • CPU waterblock for PC watercooling application
  • Highest cooling performance
  • Elegant aluminium cover in silver matte
  • Intel CPU Compatibility: 775 / 1056 / 1155 / 1150 / 1151 / 2011 / 2011-3
  • AMD CPU Compatibility: AM2 /AM2+ /AM3 /AM3+ / FM1 / FM2 / FM2+ /AM4
$116.07
$74.57
itemId=tm3994|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC RayStorm Neo WaterBlock (AMD AM4) Red|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=101.98|~|priceReg=124.16|~|priceSale=101.98|~|image=https://sep.yimg.com/ay/outletpc/xspc-raystorm-neo-waterblock-amd-am4-red-62.jpg

XSPC RayStorm Neo WaterBlock (AMD AM4) Red

  • High performance copper base High quality acrylic top Solid aluminium bracket
  • Low flow restriction RGB Lighting 2 x 2x5x5mm LED holes
  • G1/4? threads Compatible with most compression fittings Supports AMD sockets AM2, AM2+, AM3, AM3+, AM4, FM1, FM2, FM2+
  • Supplied with mounting hardware, RGB controller, two RGB LED, allen key, and K3 thermal paste.
$124.16
$101.98
itemId=vn7456|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=Swiftech Apogee Drive II CPU Waterblock & Pump for AMD CPUs (AM4 Compatible)|~|brand=Swiftech|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=127.92|~|priceReg=150.49|~|priceSale=127.92|~|image=https://sep.yimg.com/ay/outletpc/swiftech-apogee-drive-ii-cpu-waterblock-pump-for-amd-cpus-am4-compatible-25.jpg

Swiftech Apogee Drive II CPU Waterblock & Pump for AMD CPUs (AM4 Compatible)

  • CPU Waterblock with supplemental pump for AMD CPUs (AM4 compatible)
  • Best thermal and hydraulic performance
  • Compact form factor
  • Adjustable inlet and outlet ports
  • Illuminated logo in 3 colors: red, blue or green
$150.49
$127.92
itemId=aj0347-ekwb-ek-fc-geforce-gtx-fe-nickel|~|priceRange=1|~|orderable=T|~|orderCount=0|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=EKWB EK-FC GeForce GTX FE - Nickel|~|brand=EK Water Blocks|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=3.5|~|ratingCount=49|~|price=139.89|~|priceReg=163.08|~|priceSale=139.89|~|image=https://sep.yimg.com/ay/outletpc/ekwb-ek-fc-geforce-gtx-fe-nickel-62.jpg
49 Reviews

EKWB EK-FC GeForce GTX FE - Nickel

  • High Performance Copper Base
  • G1/4" Threads
  • Top: CNC Machined Acrylic
  • Base: Mirror Finish Nickel-plated Copper
  • Compatible with all reference design GeForce GTX 1060, GeForce GTX 1070, GeForce GTX 1080, GeForce GTX 1080 Ti, GeForce Titan X Pascal and GeForce Titan Xp based graphics cards
$163.08
$139.89
itemId=wr4574|~|priceRange=1|~|orderable=T|~|orderCount=1|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC Razor Neo - GTX 1080 / 1080 Ti (Chrome + Tempered Glass)|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=149.9|~|priceReg=168.79|~|priceSale=149.9|~|image=https://sep.yimg.com/ay/outletpc/xspc-razor-neo-gtx-1080-1080-ti-chrome-tempered-glass-62.jpg

XSPC Razor Neo - GTX 1080 / 1080 Ti (Chrome + Tempered Glass)

  • Ultra clear tempered glass window
  • RGB lighting and controller
  • Pure copper base with nickel plating
  • Coolant flow path free from aluminium
  • Supports Nvidia GTX 1080, GTX 1070, 1080 Ti, 1070 Ti and Titan X Pascal cards (Nvidia reference designs and founders edition only)
$168.79
$149.90
itemId=td2241-xspc-full-cover-razor-gtx-980-980ti-water-block|~|priceRange=1|~|orderable=T|~|orderCount=1|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=XSPC Full Cover Razor GTX 980 / 980Ti Water Block|~|brand=XSPC|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=89.89|~|priceReg=176.78|~|priceSale=89.89|~|image=https://sep.yimg.com/ay/outletpc/xspc-full-cover-razor-gtx-980-980ti-water-block-128.jpg

XSPC Full Cover Razor GTX 980 / 980Ti Water Block

$176.78
$89.89
itemId=gf2930-ekfc1080-gtx-ti-strix-acetalnickel|~|priceRange=1|~|orderable=T|~|orderCount=3|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=EK-FC1080 GTX Ti Strix - Acetal+Nickel Water Block|~|brand=EK Water Blocks|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=157.98|~|priceReg=187.78|~|priceSale=157.98|~|image=https://sep.yimg.com/ay/outletpc/ek-fc1080-gtx-ti-strix-acetal-nickel-water-block-138.jpg

EK-FC1080 GTX Ti Strix - Acetal+Nickel Water Block

$187.78
$157.98
itemId=qx8569-swiftech-apd2amd-apogee-drive-ii-with-pump-for-am|~|priceRange=1|~|orderable=T|~|orderCount=|~|call-to-order=|~|call-for-price=|~|hasOptions=T|~|isOrganic=F|~|isNew=F|~|bestseller=|~|name=Swiftech APD2-AMD Apogee Drive II with Pump for AMD Sockets|~|brand=Swiftech|~|cpuBrand=|~|ramIncluded=|~|type=|~|rating=0|~|ratingCount=0|~|price=138.58|~|priceReg=189.95|~|priceSale=138.58|~|image=https://sep.yimg.com/ay/outletpc/swiftech-apd2-amd-apogee-drive-ii-with-pump-for-amd-sockets-70.jpg

Swiftech APD2-AMD Apogee Drive II with Pump for AMD Sockets

  • Improved Thermal Performance
  • NO Flow Restriction
  • Speed-adjustable
  • Compact form factor
  • Fine-tuned Retention Mechanism, with universal Desktop Processor Compatibility
$189.95
$138.58
Top






Best Selling Blocks

  1. EK-FC1080 GTX Ti Strix - Acetal+Nickel Water Block
  2. XSPC RayStorm Pro WaterBlock (Intel) White
  3. XSPC RayStorm CPU/APU WaterBlock (AMD AM4) V3
  4. XSPC RayStorm Pro WaterBlock (Intel) Black
  5. XSPC RayStorm Pro WaterBlock (AMD AM4) Black
  6. Alphacool Eisblock XPX CPU - Intel/AMD - Silver Matte
  7. EKWB EK-Supremacy EVO - Acetal + Nickel
  8. XSPC RayStorm Pro RGB WaterBlock (AMD AM4) Black
  9. XSPC Full Cover Razor GTX 980 / 980Ti Water Block
  10. XSPC RayStorm Neo WaterBlock (Intel) Black Chrome
A water cooling blocks act as the heatsink equivalent for a liquid cooled system. With water acting as the heat conductor this provides for excellent thermal transfer rates to keep your cpu, gpu, and other components at low temperatures. Copper and aluminum blocks are among the most popular for their high thermal conductivity. We carry blocks compatible with both AMD and intel builds and much more to come.

FAQ & Section Info
What type of block should I use?

As a rule of thumb it is best to stick with aluminum or copper. Copper is a better conductor of heat so keep that in mind when choosing the block for your system. We recommend sticking to those two metals to prevent galvanic corrosion. The more metals you introduce to your loop the more prone it will be to corrosion.

What is galvanic corrosion? Galvanic corrosion is an electrochemical process where one metal corrodes to another when in electrical contact via an electrolyte. In layman terms this means when using one or more type of metal with distilled water there is a potential for one metal to corrode the other.

What is the purpose of the CPU block in a water loop?

The CPU block is the interface between the processor and the loop. They are typically made of a highly conductive metal (such as copper) and will be designed to mount to your socket. The base of a CPU block touches the processor and the opposite end connects to your loop to drive the heat away. These blocks fit different sockets so be sure to check the descriptions to match your motherboard type - including LGA2011, LGA1151, LGA1150, FM2, AM3, and all future releases.

What company makes the best CPU block?

This can really vary as every block is unique and can fit different needs. We recommend going with some of the big names out there - Alphacool, Swiftech, EK, and XSPC.

Do I need a water block for my loop?

Yes! The waterblock is what connects your loop to your CPU, graphics card, or whatever other device you are trying to cool.