OCZ HydroFlow HF-MK1 CPU Waterblock
Author: Zahn Funk
Editor: Shawn Knight
Date: 11-16-2008
Provided by: OCZ Technology

I will be using the OCZ Hydroflow on my Phenom 9850 quad core processor, so I reassembled the block using the AMD top bracket making sure to orient the base pin pattern correctly for proper flow. The 3/8" barbs were installed to match the rest of my other water cooling hardware. As I was laying out the remaining components and reviewing the instructions I came across a problem. The updated AMD guide insert instructs the use of four special spacer washers on the reverse side of the motherboard, however these washers do not fit over the base of the standoffs. And the other set of standoffs, intended for Intel installations, are not long enough to secure the backplate to the motherboard.

OCZ includes twelve of the paper washers, which are intended to be used on the top of the motherboard, so I opted to double up the unused ones on the under side. This complicates the process of trying to get both washers over the threads while inserting the standoff through the motherboard hole and holding the backplate in place at the same time. And as I came to find out, they are completely unnecessary since the unthreaded portion of the standoffs prevents them from being overtightened anyway. I suspect that OCZ may have originally manufactured a standoff with a much longer threaded section, thus requiring the spacer washer and guide page update, but then had new standoffs made to work without the spacer. In any case, I did get the backplate on and ready for installation of the block.

Of course it is always recommended that any time liquid cooling components are assembled you perform a leak test prior to putting them to use on a live system. In this case I've put the HydroFlow block in my water cooling loop with a Swiftech MCR220 radiator and MCP350-based pump with nominal discharge of ~116gph. Tubing and barbs are 3/8" throughout the system. One item noticeably absent from OCZ's HydroFlow bundle are clamps, although as shown, zip ties make for an effective alternative. The spring-loaded thumbscrews apply the correct amount of tension on the CPU without danger of overtightening.

Let's perform some testing and conclude this review.

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