Archive for January 21, 2012

i7-2600K CPU Danger Den M6 Block Preview

Posted: January 21, 2012 in Blocks
Tags: , , , , ,

Welcome to my preview of the all new Danger Den M6 CPU block recently announced.  My last Danger Den block test included the acrylic top MC-TDX that I tested as part of my Q6600 CPU block round.  While the MC-TDX was a simple and effective two piece acrylic top and hold down design, the M6 steps it up several notches in a completely redesigned all metal 4 piece form of metal artwork.  In my experience Danger Den products have always been leaders in producing low restriction / high flow designs and the M6 continues that trend while also improving thermal performance significantly over the previous MC-TDX.  The all metal build and heft of the block is worthy of note and inspires confidence in purchasing a product that can take a beating with high mounting pressures.  The sample I received for testing was actually provided prior to the retail package being released and as part of this test, I have been working on evaluating a special shim/nozzle package that will compliment and further enhances performance. Rather than hold onto all the data until complete, I figured I’d release what I have so far and update as I complete evaluating more shims/nozzles.

Before getting started, I would like to give a special thanks to Jeremy & Dennis from Danger Den for sponsoring the preview sample as well as the prototype shims soon to also be regular products.

Before digging in on my own review, I thought I would quote the manufacturers specs info available:

Press Release

from Danger Den’s website:

Danger Den® introduces a new CPU Cooling Block – DD-M6 CPU Block™ the highest performing CPU block to date from Danger Den.


Astoria, OR – December 28, 2011, 7:16 PM Pacific Standard Time – Danger Den announced the release for sale the new highest performing CPU waterblock, the DD-M6 CPU Block™ with shipments beginning January 2nd, 2012.

The DD-M6 CPU Block™ replaces the long running MC-TDX block improving upon the performance and reliability.  Thermal performance is significantly improved while maintaining a low flow restriction design.  Available in solid copper and brass parts that are non-plated or nickel plated.  A new and improved mounting system is also part of the DD-M6 CPU block package allowing reliable mounting pressure in an attractive package.

“Danger Den released a CPU block that we are proud of.  Improved performance, built like a tank, and almost 100% produced in the US. The Top Plate, Mid Plate, Hold Down Plate, Hold Down parts are all machined in our facility or within 50 miles of Danger Den”, said Jeremy Burnett Danger Den’s President, adding “ The hold down package has been significantly improved for the LGA 2011 socket and previous socket versions.  It looks great and makes the mounting process simple for the consumer.”

Developing a solidly constructed CPU block was imperative to the Danger Den product line.  It provides the protection and reliability that customers demand.  Danger Den does intend to offer a lexan version for the customers that prefer the aesthetics of a clear block.

Stock and availability for the Intel Sockets including the LGA 2011 is January 2nd, 2012.  The AMD version is to follow in two weeks. 

MSRP & Product Page Links:

DD-M6 CPU Block – Brass: from $74.95

DD-M6 CPU Block – Nickel: from $79.95

Photo Gallery:


from Danger Den’s website:

  • 100% copper 110 Base with Micro Fins
  • EN Nickel Plated Mid Plate and Top
  • *NEW* Stealth Spring Mounting System
  • 1/8″ Powder Coated Steel Hold Down
  • Threaded fitting ports are G 1/4 BSPP
  • Complete Block with all O-Rings
  • Pressure Tested to 50psi
  • Fittings sold separately
  • Machine lapped and flat mirror polished
  • 58 Heat Dissipating Fins at a 0.5mm pitch and 0.25mm channel.Providing enhanced transfer of heat to the water and optimum coverage of the CPU
  • Significant temperature drops on high TDP processors and major Overclocks.  Observed over 7C drop versus MC-TDX.
  • Ready to install designed and tuned for your system for top performance
  • Anti-Tarnish coating applied to prevent finger print or environmental changes.  This specialized formula also has no effect on cooling potential.
  • Corrosion will not occur when used with other Copper and Brass parts.  Avoid using non-anodized aluminum (or all aluminum) if at all possible for maximum component life.
  • Verify proper mount before power up.  Check the thermal compound imprint and verify the block isn’t touching any capacitors.
  • Optional back plate is 1/8″ acrylic and covers the Intel back plate.  A gasket surround the Intel back plate for additional protection.

Of particular interest to me is the .25mm channels and while it’s not noted here the fins are skived rather than machined allowing this micro structure.  The block really is a totally new design over the previous generation.

Welcome to my review of the Aqua Computer’s Flow Meter. While I have typically relied on my King Instruments analog flow meters for most of my test purposes, trying to fit a 14″ tall flow meter into your case isn’t very practical. For computers we need something smaller in size that can send an electronic signal to be processed digitally. Aqua Computers has taken a popular and high quality Digmesa sensor and fabricated a new water cooling specific housing and flow chamber for it.  We all like our G1/4 fittings and like a clean look which is the transformation that was done.

I would like to thank Shoggy from Aqua Computer for this review sample that was included for Aquaero review, thanks!


While flow meters are not a necessary part of a water cooling loop, and they do add restriction, they also provide some information that can be used in a few different ways:

Clean Health Indicator – The tubes and blocks in your system are like veins and arteries in your body and can plug due to a variety of reasons.  Plasticizers, flux, corrosion, and sedimentation of chemicals or some dyes can all be contributing chloresteral if you will.  If you plan to keep the same loop operational for longer than 3-6 months, a precision flow meter can be a great piece of before and after information on yoru system and give you that indication that all is well without tearing everything down.  Consider it a blood pressure cuff for your water cooling system.

Emergency Shut Down – In the event that a pump fails to start, quit, or begin failing..a flow meter is one way to monitor that and shut down a system due to flow rates being too low.  I have seen at least one DDC pump loose part of it’s circuitry yet it still operated.

Complex Pump Setups & Parallel Loops – I have seen people connect up bay reservoirs incorrectly with two pumps in series such that only one was actually doing work.  Both pumps were moving and water was moving in the reservoir, but they had no idea that allowing the reservoirs to be shared essentially eliminated all work by the first pump(no pressure differential).  People are also beginning to experiment with parallel loop systems which can be an advantage but much more tricky to design properly when most parts out there don’t include basic restriction pressure drop info.  While not likely, it is possible to build a parallel system that could be a pretty bad idea if the restriction levels are too unbalance.  In parallel it is also possible to completely block one path of flow and not know it. Flow meters would again provide confirmation that things are operating as intended and continue that way.

Testing/Tinkering – This is of coarse why I like them.  While flow rate effects are generally small, I consider it taboo to test or review something thermally without also comparing restriction in some form or another.  Even if it’s not for comparison and just for information, a meter completes the package of information that is easily collected for the end user to have and think about.

I have used flow meters in the past for most of my testing work and have also used them for a couple of long term loops that I ran for over two years without cleaning, so I also see the health indicator being a value for me as I typically do like to push maintenance intervals to their maximum and generally only tear things down when upgrading.


  • Digmesa Impeller & Sensor
  • Flow rate range: 0.67-10 l/min (LPM) / 0.18 – 2.64 GPM
  • Tolerance ± 2.0%
  • Poll value: 169 impulses per liter (Small ID Fittings)
  • Supply voltage: DC 5V 5-13 mA
  • Input-output threads: G 1/4 BSP nozzles
  • Materials used: plastic, stainless steel
  • Internals Accessible For Cleaning
  • Large 3 pin connector (larger than normal fan connector)
The specifications look promising in both flow rate sensitivity as well as voltage since an ordinary PC power supply also has 5VDC.

Plug and Play Compatibility:

If you just want to plug in the unit and have speed data converted to flow values, using an AC cable and one of the following will do that for you:
  • aquaero 5 XT / PRO / LT
  • aquaero 4.00 USB Fan-Controller
  • aquaero LT 4.00 USB Fan-Controller
  • aquaero 3.07 USB Fan-Controller
  • aquaero LT 3.07 USB Fan-Controller
  • poweradjust USB
  • poweradjust USB Version LT
  • aquastream XT USB Ultra-Version
  • aquaduct 240 Pro mark III
  • aquaduct 360 eco+
Both specifications and compatibility are good. We’ll take a closer look at the package you get next.