Hey Cryptocurrency Miners 👷‍♂️⛏ Most of the FPGA mining cards available in the market right now require waterblocks to cool down their FPGA chip. DimasTech️❄️is one of the two waterblock makers for VU9P FPGAs️ and we are fortunate enough to get our hands on their waterblock. Without further ado, let's start the review!

Installing the DimasTech Waterblock

We understand that our fellow miners have done a lot of changes to the original way of installing the waterblock. Hence, we want to make sure everyone understands that we installed the DimasTech waterblock onto the BCU1525 exactly the same way as the instruction had provided. No extra thermal pads. However, the thermal pads we cut might be inaccurate in size.

We had to cut the thermal pads into different sizes (varying from 3x3mm to 82.4x12.4mm) and place them onto the waterblock. It took us around 20-25 minutes to finish cutting the thermal pads into 24 pieces 😭

How we installed the thermal pads.
DimasTech Waterblock on BCU1525.

You can read the full thermal pads instruction here.


We're trying to see from the core temperature which one is better at cooling the FPGA chip. We're not saying our methodologies and test results are the most accurate and precise, but this is what we got.

We tested the DimasTech️ Waterblock and TUL Waterblock on two separate BCU1525s, each mining the RB2 bitstream from 🔥Whitefire. Both are set in the same environment. We tested them individually one by one, with only one board running at a time. Here's the environment of the test:
- Room temp: 25C
- VCC: 0.87V
- Frequency: 650Mhz

TUL Waterblock DT❄️ Waterblock
Core Temperature 38C 44C
Water Flow Restricted Flow Smooth Flow
LTC Temperature 84.4C 84C
Idle Waterblock Temp
Idle Backplate Temp
Mining Waterblock Temp
Mining Backplate Temp

From our test result, the TUL waterblock cools the FPGA chip better than DimasTech (6C difference), but the DimasTech waterblock has a better flow rate compared to the TUL.

This is because the TUL waterblock has many extremely dense fins inside the waterblock that can dissipate heat well. Additionally, the LTC temperature for both backplates is pretty much the same. For the water flow rate, we did a qualitative measurement for both of the waterblocks. From how it looks, the DimasTech waterblock has a better flow rate compared to the TUL waterblock.

We already confirmed our test result with DimasTech.

Conclusion: FPGA.guide and DimasTech test results are the same.
FPGA Guide

Your Guide to FPGA Mining


  • 👮🏻‍♂️Made of Copper. No risk of galvanic corrosion for copper-based water cooling system.
  • 💧 Better Water Flow Rate. No restrictive fins inside the waterblock.
  • 💦 No Leak. This waterblock is made of metal, so there is no chance of leaking from the waterblock cracks.
  • 🌎 Ships Immediately Worldwide. (In Stock)


  • ☹️ Not User-Friendly. We have to cut our own thermal pads into small pieces, which is a pretty painful process.
  • ☃️ TUL Waterblock Cools Better. Because of its dense fins, TUL's waterblock is able to dissipate heat better.

Company Background

DimasTech USA❄️ is a global player in providing custom case and cooling solutions for electronics and computers. Their products range from Professional Tech-Stations to Custom Cases and Cabinets; they are also able to make a custom cooling system/source custom components for their customers.

Their key values are:
- Agile and dynamic structure
- Customer feedback based R&D department
- Quality, user-oriented products
- Customization service made easy

DimasTech❄️ sells some other useful components for your FPGA mining needs such as bench table, mining case and many more. You can check them out in their shop.

Website: shopusa.dimastech.com
Address: 850 Saint Paul Street, suite 26 Rochester, NY 14605 USA
Tel. (585) 434-3173
Skype: dimastechcooling

You can also find DimasTech❄️representative on Discord under nickname DimasTech_laverdad_crypto#0071.