ekwb EK-PRO GPU WB RTX A4090 User manual

USER GUIDE
GPU WATER BLOCK
EK-PRO
GPU WB RTX A4090

Before you start using this product, please follow these basic guidelines:
Carefully read the manual before beginning with the
installation process.
Remove your graphics card from the computer for the safest
mounting process to prevent any possible damage to your
GPU or its circuit board (PCB).
EK Fittings require only a small amount of force to screw
them firmly in place since the liquid seal is ensured with the
rubber O-ring gaskets.
The use of quality market-proven corrosion-inhibiting
coolants is always strongly recommended for any liquid
cooling system.
Do not use pure distilled water as a cooling liquid! For best
results, EK recommends the use of EK-CryoFuel Coolants.
Make sure to bleed air out of your water block thoroughly in
order to reach optimal performance.

- 3 -
TABLE OF CONTENTS
BOX CONTENTS 4
WATER BLOCK DIMENSIONS 5
TECHNICAL SPECIFICATIONS AND WATER BLOCK PARTS 6
PREPARING YOUR GRAPHICS CARD 7
CUTTING AND PLACING THERMAL PADS 7
REMOVING THE STOCK COOLER 7
CLEANING THE PCB 7
APPLYING THERMAL COMPOUND 8
INSTALLING THE WATER BLOCK 8
PLACING THE BLOCK ON THE GRAPHICS CARD 8
CHECKING THE CONTACT IN CASE OF HIGH TEMPERATURES 10
ATTACHING THE BACKPLATE 10
INSERTING THE GRAPHICS CARD INTO THE CHASSIS 11
TESTING THE LOOP 11
SUPPORT AND SERVICE 12
SOCIAL MEDIA 12

- 4 -
120 mm
24 mm
120 mm
24 mm
120 mm
24 mm
120 mm
24 mm
BOX CONTENTS
Zotac RTX Pro Backplate (1x)
106362
Screw M2.5 x 4 AX1 (7x)
9047
EK-Pro GPU WB AMP-Trinity RTX 4090 Ni+Inox
Thermal PAD G 0.5mm - (120 x 24 mm)
(3x)
Thermal PAD G 1mm - (120 x 24 mm)
(2x)
Thermal PAD G 1.5 mm - (120 x 24 mm)
(2x)
Thermal PAD G 2.0 mm - (120 x 24 mm)
(3x)
Screw M2.5 x 7 AX1 (6x)
9049

- 5 -
WATER BLOCK DIMENSIONS
245.9 mm
234.5 mm
180.3 mm
151.9 mm
135.7 mm
32.5 mm 87.1 mm
23.2 mm
15.6 mm

- 6 -
TECHNICAL SPECIFICATIONS AND WATER BLOCK PARTS
Position EAN Description Quantity
1106474 088 - baker - Zotac RTX 4090 Pro Coldplate TT (Ni) 1
2106133 TOP Plexi - Vector
2
Insert R5 1
3106475 088 - kovina - Zotac RTX 4090 Pro top TT 1
4103089 vijak M3 x 5 ISO 14581 TX INOX 22
5103988 Distancer M4-M2.5 x 3 mm Vector
2
(Nickel) 7
6106359
088 - kovina - Pro GPU WB RTX 4090 IO Bracket (Nickel) 1
7106357 Distancer M3-M2.5 x 12.3 Medenina Ni (female) 7
8106439 Top Acetal - Pro Terminal GPU 45 deg G1-4 v2 1
95155 OR 15 x 1 EPDM50 (FC Terminal) 2
10 5111 OR 143 x 2 1
11 100006 Vijak M4 x 27 DIN7984 1
12 9023 Vijak M4 x 6 DIN7984 2
7
11
6
10
5
3
4
12
1
8
2
9

- 7 -
PREPARING YOUR GRAPHICS CARD
STEP 1
REMOVING THE STOCK COOLER
Place your graphics card on the flat surface and carefully remove the
stock cooler. Do not forget to unplug all the LED and fan connectors.
Pay attention to the following steps in order to install the EK-Pro GPU
RTX 4090 – Nickel + Inox water block onto the graphics card.
STEP 2
CLEANING THE PCB
Wipe off the remains of the original thermal compound using a
nonabrasive cloth or Q-tip, as shown in the sample image, until the
components and circuit board are completely clean. EK recommends
the use of denatured alcohol for removing TIM leftovers. After that,
remove all remaining stock thermal pads from the PCB.
STEP 2
CUTTING AND PLACING THERMAL PADS
STEP 2
Your GPU water block comes with un-cuted thermal pads to cover
all the VRM components, such as COILs, MOSFETs and drivers.
Please use thermal pads which should be placed on the PCB as
ilustrated below.
You must remove the protective foil from both sides of the
thermal pad before installation.
Thermal Pad - 120 x 16 x 1.0 mm
F1
Thermal Pad - 120 x 16 x 1.5 mm
F1.5
Thermal Pad - 120 x 24 x 0.5 mm
G0.5
F1
F1.5
F1.5
F1.5 F1.5
F1.5
F1.5
G0.5
G0.5
G0.5
G0.5
G0.5
G0.5 F1 F1
F1

- 8 -
Thermal Grease
Apply the enclosed EK-TIM Ectotherm thermal grease (thermal
compound) on the GPU heat spreader – IHS – as shown in the
image. The layer of the thermal compound must be thin and even
over the entire surface of the IHS.
The excessive or uneven application of thermal grease
may lead to poor performance!
APPLYING THERMAL COMPOUND
For this step, you will need:
INSTALLING THE WATER BLOCK
STEP 1
STEP 1
PLACING THE BLOCK ON THE GRAPHICS CARD
This procedure is the same for all full-cover water blocks. Carefully
position the water block with preinstalled standoffs on the graphics
card. During this process, make sure you have aligned mounting
holes of the PCB with holes of the water block.
Pay attention not to use too much force when pressing
the block down to the PCB since chip dies are prone
to cracking.
Mount it with (7) M2.5 x 4 AX1 screws.

- 9 -
STEP 2
STEP 3
STEP 2
Install 0.5 mm, 1.0 mm and 1.5mm thick thermal pads on the PCB,
as illustrated below to ensure better connection between graphic
card and coldplate. EK made sure to provide you with more than an
adequate quantity of thermal pads to complete this Step.
STEP 3
Install 2.0 mm thick thermal pads on the BP, as illustrated below to
ensure better connection between graphic card and backplate. EK
made sure to provide you with more than an adequate quantity of
thermal pads to complete this Step.
Thermal Pad - 120 x 16 x 1.0 mm
F1
Thermal Pad - 120 x 16 x 1.5 mm
F1.5
Thermal Pad - 120 x 24 x 0.5 mm
G0.5
F1
F1.5
F1.5
F1.5 F1.5
F1.5
F1.5
G0.5
G0.5
G0.5
G0.5
G0.5
G0.5 F1 F1
F1
Thermal Pad - 120 x 24 x 2.0 mm
G2
Thermal Pad - 120 x 16 x 2.0 mm
F2
G2
G2G2
F2 F2

- 10 -
STEP 4
ATTACHING THE BACKPLATE
Use six (6) M2.5 x 7 AX1 screws. Tighten the screws evenly using
the Phillips head screwdriver.
The screws must be present on the places marked below:
STEP 4
CHECKING THE CONTACT IN CASE OF HIGH TEMPERATURES
If necessary, temporarily remove the water block to check for
uniform surface contact between the block and components.
Pay special attention to the VRM section of the graphics card.
Check whether the water block makes contact with the intended
integrated circuit. Then repeat Steps from the previous section to
re-attach the block.
In case you fail to obtain good contact, please check
again or contact our support service at
https://www.ekwb.com/customer-support/.

- 11 -
INSERTING THE GRAPHICS CARD INTO THE CHASSIS
Carefully lift your graphics card with the installed water block and
insert it into your PC’s motherboard PCI express expansion slot.
Please keep in mind that your graphics card is heavier than before it
was equipped with the water block.
You need to be very careful when handling the
graphics card. Avoid all unnecessary manipulation
of the water block assembly that might damage your
card or water block.
To ensure the installation of EK components was successful, we
recommend you perform a 24-hour leak test.
When your loop is complete and filled with coolant, connect the
pump to a PSU outside your system. Do not connect power to any
of the other components. Turn on the PSU and let the pump run
continuously.
Inspect all parts of the loop, and in case the coolant leaks, fix
the issue and repeat the testing process. To prevent possible
damage, please ensure all hardware is dry before the system is
powered on.
TESTING THE LOOP

In case you need assistance or wish to order spare parts or a new
mounting mechanism, please contact:
https://www.ekwb.com/customer-support/
For spare parts orders, refer to the page with “TECHNICAL
SPECIFICATIONS AND WATER BLOCK PARTS” where you can find
the EAN number of each part you might need.
Include the EAN number with quantity in your request. Mounting
Mechanism EAN can be found under “BOX CONTENTS”
Thermal pads are readily available in the EK shop
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SUPPORT AND SERVICE
SOCIAL MEDIA