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ZALMAN WB5 Water Cooler

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Learn more about the Zalman Tech Co., Ltd WB5


CPU Block


Block Compatibility
Intel (Socket 775)
AMD (Socket AM2/754/939/940)
Block Dim.
63(W) x 63(L) x 40(H)mm
Block Material
Pure Copper (Base)
Pure Aluminum (Cover)


Zalman’s creative dimple-type processing technology allows lightness in weight and excellent cooling performance.

Pure copper-base material water block provides excellent heat transfer, and anodized water block cover prevents corrosion.

Connection fitting for the hose is a single-body cover in the form of two connection structure types, which allows for various types of hoses to be used.

Manufacturer Warranty

30 days limited

Quick Info


  • Limited Warranty period (parts): 30 days
  • Limited Warranty period (labor): 0 day

Customer Reviews of the Zalman Tech Co., Ltd WB5

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  • Ricky H.
  • 1/19/2009 6:12:45 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggs

Pros: Great block for my AMD 7750 B.E.!!!

Cons: None!!!

Other Thoughts: Arrived next day before my other parts.
Ship all parts together please!!!

1 out of 3 people found this review helpful. Did you? Yes No

  • Daniel C.
  • 12/28/2008 5:06:53 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsAwesome and refined water block

Pros: Terrific value, super high quality construction, great mounting mechanism especially on AM2, and most importantly, cools as well as water blocks costing twice as much

Cons: won't fit 1/4 inch hose

Other Thoughts: Zalman proves once again that they know how to engineer things and refine them over time. The WB5 is worthy of just about any high end installation. Cools as well as a dtek fuzion, costs less, and has a much less complex mounting approach.

2 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 11/7/2008 7:23:41 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsZalman Support

Pros: Zalman stands behind their products like no other.

I purchased the WB3 a long time ago, then 9 months later upgraded to a AM2 (non-compatible w/ WB3). I searched their website for a new clip and discovered a typo in the FAQ that said the WB3 is compatible with AM2. I pointed this out to the Zalman support guy and he sent me a brand new WB4-Gold for their minor mistake.

Unfortunately the acrylic WB4-Gold leaked after a year. Acrylic and Metal water cooling products were in style at the time but generally suffered from leaks after a year or so. Undeterred by my lack of a receipt (due to it being gratis) or that I had overtightened the fittings (not the cause of the leak, but it did damage them), I requested a free upgrade to the WB5 because of the design defect. They didn't even put up a fight.

Cons: Zalman uses anodized Aluminum in all of their waterblocks. Even with the anodizing this metal will still corrode when other metals are used in the loop. You can partially prevent this by increasing the ratio of additive/distilled water. But of course a higher additive ratio results in decreased thermal efficiency and more costs.

The WB5 and it's predecessors are all medium performance blocks. They are fairly flow restrictive and offer average thermal transfer. But they are priced appropriately for their performance.

As I mentioned the WB4-Gold used an Acrylic metal combo. Rarely does that combo turn out to be a good thing. It lets you visually inspect the block with ease, but often results in leaks. Luckily the WB5 has no Acrylic.

Other Thoughts: If you are debating what part to buy I highly recommend the guide in the water cooling section over at Extreme Overclocking. It answers tons of questions and has performance reviews on everything.

7 out of 8 people found this review helpful. Did you? Yes No

  • Steven S.
  • 9/21/2008 5:34:39 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks Great

Pros: Installation was easy. Barbed fittings and clamps make it easy to match to any tubing (versus compression fittings). You do have to remove the motherboard, as with most coolers, but the instructions give plenty of detail.

Cons: Hold down clip alignment a little confusing for my 775-series Conroe, but figured it out (sort of an over/under cross-aligning of the clips).

Other Thoughts: I'm not an overclocker. This is for a server board, and it performs extremely well. My CPU is only several degress Centigrade above ambient, and I am only using a single 120mm radiator. I don't think you can beat watercooling for keeping CPU temps low, unless you go to the more exotic Peltier or phase-change coolers.

2 out of 2 people found this review helpful. Did you? Yes No

  • Chris W.
  • 9/20/2008 7:11:39 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat cooling block

Pros: All metal construction.
Fits well on my asrock x48 mobo.
Keeps my Q9550 CPU very cool.

Cons: I cant really think of any.

Other Thoughts: I ordered this as a replacement for the WB4 block that came with my zalman reservator 1 v2. I had managed to heat the WB4 block up enough that it lost the seal between the copper and plastic parts, which then leaked water inside my case.

1 out of 1 people found this review helpful. Did you? Yes No

  • Devin B.
  • 9/6/2008 1:00:34 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat water block

Pros: This water block is amazing. Congrats to Zalman on being the first company to release a decent water block for am2+ processors. This keeps my phenom 9950 under 120 degrees all the time.

Cons: None really, it does have one tiny little petty design flaw. In the product manual it tells you to install the block with the inlet nozzle above the outlet nozzle, but on my mobo you can only install the block with the nozzles side by side. I don't know if it makes a difference, it still keeps my cpu nice and chilly.

Other Thoughts: If you're looking for an am2+ water block, this one is a definite keeper. Included all the hardware I needed and all nozzles came tight upon delivery. Highly recommended.

1 out of 1 people found this review helpful. Did you? Yes No

  • France P.
  • 7/26/2008 1:03:16 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWILL FIT EVGA 780I BOARD

Pros: Excellant fit,High quality.

Cons: NONE


4 out of 7 people found this review helpful. Did you? Yes No

  • Anonymous
  • 7/3/2008 8:59:11 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsDoesn't fit EVGA 780i SLI

Pros: I'm sure it's a great working product because I've been running a ZALMAN ZM - Reserator1 V2 Water Cooling System on my PC for 2 years with no problems.

Cons: When I tried to install it onto the EVGA nForce 780i SLI MB, I couldn't latch the clip which goes over the water cooler because of the 4 black boxes next to the CPU socket.

Other Thoughts: From what I've seen, due to same configuration on the XFX MB-N780-ISH9 MB this problem would also most likely exist. So if you have one of these 2 MB's you might want to look into a different CPU water cooler.

10 out of 10 people found this review helpful. Did you? Yes No

  • Patrick C.
  • 4/27/2008 9:04:37 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsThis thing is COOL... haha

Pros: CPU goes above 100degF rarely even under Load... Awesome... Easy to install too

Cons: Should have bought this one the first time...

4 out of 4 people found this review helpful. Did you? Yes No

  • Jeremiah B.
  • 4/6/2008 3:42:29 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsNice Block

Pros: Excellent design, solid unit. It covers a LGA775 chip completely. I comes with all necessary adapters.

Cons: None, really.

Other Thoughts: This is hooked up to a Koolance watercooler and under a load, the CPU is around 28-30C.

2 out of 2 people found this review helpful. Did you? Yes No

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