Den TDX CPU Block Review
Welcome to my review of the Danger Den TDX CPU waterblock.
This is the Danger
Den standard TDX model which is designed for single or dual core
processors. Danger Den's other model the MC-TDX is designed for dual or quad core
They both utilize the same type of casting construction and tops,
but they have different pin matrix designs, coverage areas, and nozzle
components. Let see more of this block and see how it
enjoy our typical "opening up a new present" moment and see what you
get as part of the packaging. First off my box of Danger Den
goodies arrived via FedEx in a well packaged box, and the delivery
person even range my doorbell to hand deliver the package, that was a
nice pleasant surprise! I received several products that were
boxed nicely in a standard box with packaging peanuts and it was
professionally packaged box in a box style double protection.
Specifications & Features
- Accelerator Plate #1
- 100% copper 110 material
- Acrylic and brass top options
- Threaded fitting ports are G 1/4 BSPP for use with any similar spec
- Complete Block with O-Ring
- Pressure Tested to 50psi
- High flow 1/4", 3/8", or 1/2" Chrome Plated Fittings
- Machine lapped and flat mirror polished
- Stainless steel hold down
- Anti-Tarnish coating applied to prevent tarnis from finger prints or environmental changes.
This specialized formula also has no affect on cooling potential.
- All Copper - No aluminum or coated aluminum that can have
galvanic corrosion, all materials are copper, brass, stainless steel,
- Preassembled block and barbs - No waste in plastic barbs you won't use and perfect barb installation.
- LGA 775 Only Custom top - Provides a more custom look, rather than a univeral hold down with many leftover holes.
Here are several pictures I've taken at different angles and distances
to give you a good viewing of the block for yourself. I'm mixing
a few others within the entire review as well, but here is a large
majority of the pictures for your viewing pleasure. (Click
thumbnails to enlarge):
Integrated Accelerator Nozzle Seat and Nozzle Plate
The Danger Den TDX CPU block is designed specifically to run a nozzle.
Water cooling and water block design is a careful balance of
restriction vs thermal performance. While a completely open
cavity block may have very little restriction, it's not going to
perform very well. You need an adequate amount of heat transfer
surface contact area, and you need high turbulence.
Let me try to explain what occurs in a water block nozzle. A
nozzle provides a reduced cross sectional area and increases
velocities. Because water and most fluids are considered
incompressible, you have the same flow rate in all parts of the system
in a close circuit like we have in water cooling. Because flow
rate is a constant, when the cross sectional area is reduced, the fluid
must travel at a higher velocity. Assuming your system flow rate
is 1.5 gallons per minute the Danger Den TDX nozzle would increase
velocity in the fluid something similar to this:
as you can see the nozzle is producing a jet stream that is almost
3X the speed of the coolant in 1/2" tubing. This increased
velocity improves the scrubbing effect of the waterblock base and floor
of water crashes through the channels and impacts the internal floor of
the water block where it is needed most. The nozzle plate also
the flow more equally into each of the serpentine channels that
of the TDX block. Finally this increased velocity provides
turbulence or a mixing of the water in this critical area, this
ensures that colder water molecules in the center of the jet stream
have a better chance at coming into contact with the channel walls and
absorbing heat generated by the base.
Additional Accelerator Nozzles Available
Danger Den also has a TDX 5 nozzle kit available at thier site
One big advantage of a nozzle setup for waterblocks is the
ability for the user to utilize different nozzles depending on the user
needs. Depending on your particular pump, your particular
CPU, and what else you may or may not be cooling in this same
cooling loop, you may find
one of the other nozzles to provide better performance than the
standard nozzle #1. Danger Den provides 5 nozzles, 4 of which are
premade, and 1 blank for you to design your own.
Construction, Materials, Quality, and Aesthetics
Overall construction of the block and attention to detail is superb.
The base is very finely cast from C110 copper and having seen some
casting problems in past on other blocks, I was pleasantly suprise that
I could not find any.
The TDX utilizes a combination of chanels and drill hole dimples
to create an array of serpentine channels so water will encounter
changes in shape and cross section as it flows through these channels.
The serpentine shape will mean more water will change directions
and mix and impact the walls. To the right you can see a macro
view of thes channel construction and note the nozzle holder wall on
each side specifically designed to accomodate nozzles.
The base bottom is very adequate in finish, you can see by the
photo above in the gallery how it is a nicely finished base nearly a
mirror in reflection and a straightedge test proved flatness to be
fairly common knowledge that lapping a base much beyond 1000 grit no
longer yields additional performance gains, so the specified 1200 grit
The top is fabricated of 3/8" (9.3mm) thickness acrylic sheet and is
very precisely CNC machined and the edges are nicely finished.
Some folks may not prefer the use of Acrylic (Lucite) due to
durability concerns. Fortunately for you all metal block-heads
out there, Danger Den has produced the same top in a brass option for
you to choose from and it's at a very reasonable price. Go for a brass top if you want that added durability.
The barbs are nickel plated brass, (no flimsy cheap plastic barbs
here!). Using my digital calipers the inside diameter is a heavy
10.15mm, that's as bored out as it gets for G1/4 threading. The
barbs have all been installed and the block pressure tested at 85psi,
so no worries about leaks, you shouldn't have to touch these barbs,
they come preinstalled and pressure tested. On some of my other
blocks that came with plastic barbs, I had a hard time getting tubing
back off of them and getting tubing onto them without the barbs turning
on me, brass barbs don't have that problem. Danger Den has also
sent me some samples of their new barbs they plan on incorporating that
are a fantastic compliment and significant improvement over the ones
shown in the above photos. See the new barbs on my review page here.
The block screws as previously noted are a stainless round-head type
screw that appears to be a nice 6-32 screw dimension and the head
itself receive a standard 2mm allen head. All of the remaining
mounting hardware appears to be in good order, nice larger brass
thumbscrews and the necessary studs, springs, nuts and washers and
appear to be in the 4-40 threading form.
The block is very nice to look at with a high level attention to detal.
due to the transparent top, or perhaps it's
the design of the copper mini pin matrix base and all that surface area
for heat conductivity. I
also appreciate the integrated hold down and top. A personal
preference of mine is to have a top that looks custom. The block
exceed my expectations in this area, but I encourage you to look more
at the pictures and decide for yourself.
Pressure Drop Testing
most scientific way to determine a blocks hydraulic resistance is to
test pressure drop. Pressure drop is a measurement of pressure loss
across a block that varies with flow rate. This is basically a
measurement of energy loss, and directly influences how much flow rate
you will have.
The pressure drop testing results were very good, about the same as a
D-Tek Fuzion WITHOUT a nozzle (with washer), and
even better than most cross flow blocks like the Apogee GTX.
It's also substantially better than most nozzled type CPU blocks as you can see below:
- Dwyer Digital Manometer 475 Mark III - Accuracy .5% of Full Scale. Range 0-200" W.C., Resolution .1" W.C.
- King Instruments 7520 Series 0-5GPM, 250mm scale - Accuracy 2% of Full Scale. Range 0-5GPM, Resolution .1GPM (can be interpolated to .02GPM)
- Water Source - Household water pressure - 50PSI at >5GPM
- Because flow rate readings are instantaneous, household tap water and
water pressure are a good and powerful source for pressure drop testing.
Therefore overall pressure drop on Danger Den's TDX is VERY GOOD in
general and EXCEPTIONAL for a nozzled block! The TDX and nozzle
#1 is not very
restrictive at all and would do well in multiple block loops where too
much CPU restriction could affect performance of other blocks.
You can see just how much lower the pressure drop is than a D-Tek
with a 4.4mm nozzle and washer.
The DD TDX with Nozzle #1 has 7X Less restriction than a D-Tek Fuzion with 4.4mm nozzle and washer
Very impressive pressure drop for a nozzled block!
Installation on an Evga 680i
The installation on the 680i was not a problem at all. I actually
preferred the larger 6-32 threading of the TDX kit over my previous
4-40 bolts from my D-Tek Fuzion kit. Very basic and
Testing In Progress....Coming Soon
To provide some sort of recommending criteria, I'm establishing the following with a 0-10 scale of excellence.
||It's a good design, and unigue from other blocks
||I'm very impressed by the flawlessness of all parts included
||This is specified as a "Universal" block, so it was not specifically designed for the 680i
||Multiple top options make this a 10.
||The NEW KING of Nozzled CPU blocks!
||Testing in progress
So far so good, just need to do some thermal testing to wrap this up..
Where to buy
Danger Den's Website