The DirectCU H2O cooler that comes with the Poseidon Platinum is an entirely new
designed hybrid cooler, the first of its kind. The DirectCU H2O allows users to
choose whether they want to chill their graphics card using air, water or even
both at the same time. The cooler is made of three different parts, there is a vapor chamber, the
fin stack and the face-plate with two fans. The vapor chamber is milled from copper and it's surrounded by an aluminium part that chills all the memory
chips, the MOSFETs from the main power design and the core and memory voltage
regulation chips via thermal pads. On top of that there are three nickel plated
copper heatpipes - two with 6mm and one with 8mm diameter - that are connected to the vapor chamber
and the aluminium fin stack. The fin stack
which is being provided with fresh air via two 90mm fans. The fans carry the model number FDC10H12S9-C. The water channel that features
standard G1/4" threaded fittings goes through the vapor chamber forming a U.
Overall the cooler is very well made. With the face-plate, it would have been a
good idea if ASUS had put another screw roughly where the PCI-Express power
plugs go because on our sample the face-plate was a bit loose (can be moved up
and down). Comparing this face-plate with the one on the MARS 760 there is quite a
difference in quality. We would have appreciated if ASUS was to use the same
kind of material as on the MARS 760.
The thermal paste used is of pre-applied type.
Like most of ASUS' recent high-end cards the PCB has been completely
reworked and the power design beefed-up. A closer look at it shows a 10 phase
power implementation for the main power design where the GPU gets eight (there
are five on the reference card) and the memory two phases. The PCB design is looking
very much alike the one you get with the GTX 780 and GTX 780 Ti DirectCU II. The
card also features a full backplate to prevent bending and protect the card at
the same time.
Component wise ASUS makes use of high
quality, so called Super Alloy Power, parts. Last but not least,
located at the rear of the PCB there are several voltage reading and
modification points but unfortunately they are not labelled.
the voltage regulation chip we find a digital multi-phase controller labelled
Digi+ ASP1212 for the GPU, probably a rebranded CHiL 8228 or 8318, and one
unidentified Richtek 2-phase controller labelled 02=FE A1B for the
The memory chips used are made by Elpida and carry the model number
W2032BBBG-60-F. They are specified to run at 1'500 MHz (6'000 MHz effective).