Bykski DDR4 Memory Heat Spreader - Black (B-MRCOV-X)
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Bykski DDR4 Memory Heat Spreader - Black (B-MRCOV-X)

B-MR-COV In stock in Boise, ID
$11.99USDFree shipping over $125

US import duties and tariffs are included in every price.

Ships the same business day on orders placed before 2:00 PM MST. Overnight delivery available at checkout.
Ships directly from our Idaho inventory. You avoid overseas sellers, processing delays, international shipping, customs hold-ups and additional fees.
Fits these 2 boards, and only these

This part is machined for the 2 boards listed below — nothing else. Board revisions and partner designs differ, so match your exact model against the list before you order.

  • Memory Type: DDR4 ONLY (Use B-MRCOV-X-V2 for DDR5)
  • NOTE: Dual sided DIMMS may require .5mm thermal pads (Sold Separately)
Not sure? Send us your model/part number and we'll confirm it for you.
or ready to checkout now
Fittings for this block

PrimoChill SX fittings for the G1/4 ports, in stock in Boise. Pick a finish and how many you need; 6+ in any mix and the price drops.

Pick a finish, then add quantities.
Building your first loop? Plan the rest of it
Why buy it here
US warranty, handled in Boise
Claims are settled here, by the people who sold it to you.
Custom watercooling since 2002
PrimoChill, from Boise, Idaho.

About this part

The Bykski B-MRCOV-X Memory Heat Spreader is a great way to improve the cooling of your DDR4 RAM. By installing a water block on top of the spreader, you can effectively transfer heat away from the sensitive components, and into the water block. This will help to keep your RAM running cooler and more reliably.

In the box
  • 1x Memory Heat Spreader - Black (B-MRCOV-X)
  • 2x 1.2mm Thermal Pad (For Single-Sided DIMMS only).
  • 3x M3 Install Screws

Warning: This product is designed for self-installation. The manufacturer is not liable for any damages resulting from misuse, including, but not limited to, improper installation or the use of incompatible hardware or fluids. By using this product, you accept all related risks.

If the gallery shows a parts diagram, that diagram is the source of truth for what ships.
Datasheet
ModelB-MRCOV-X
MaterialAnodized Aluminum - Black
SKUB-MR-COV

What buyers said

Left by people who bought this part here. Compatibility reports are the useful ones — if you installed it, say which board.

What installing it actually involves

Three steps, in the order that matters. The one people get wrong is the first.

01
Confirm the hardware

This block fits 2 boards:

    Match your exact model — not the family.

    02
    Mount it dry

    Thermal interface material as supplied. Even mounting pressure, correct bracket orientation, no over-torquing.

    03
    Leak test before power

    Run the pump on a bench supply with the rest of the system unpowered. 24 hours is the standard, an hour is the minimum.

    Custom water cooling is installed by you, at your own risk. We are not responsible for leaks, or for damage to your parts or system. If you're unsure at any step, ask before you power the loop.

    Questions people ask about this part

    Answers specific to B-MR-COV. If yours isn't here, ask — we'd rather talk you out of the wrong part than sell you one.

    What does this part fit?

    It is machined for 2 boards:

      These are machined to a specific hardware layout, so match your exact model rather than the family before ordering. Part number B-MR-COV.

      Is it in stock, and when will it ship?
      Yes — in stock in Boise, Idaho. Orders placed before 2:00 PM MST on a business day ship the same day — we do not ship weekends or US holidays. Overnight delivery is available at checkout.
      Can I return it if it turns out not to fit?
      Yes. Returns are accepted within 30 days and are easy to start in the support center. Unopened items can be returned for store credit with no restocking fee; other returns carry a restocking fee, higher for items that have been installed or used. So we would rather check the fit with you first: send us the model and we will check it against this part.
      Will I pay import duties or customs charges on delivery?
      Not on a US order. US import duties and tariffs are already included in the price, so nothing is collected at the door and there is no brokerage fee. Orders shipped outside the US may owe that country's customs fees and duties.
      Who handles the warranty?
      PrimoChill, from Boise, Idaho. Every claim is handled directly by our support team rather than returned to an overseas factory. Installation is at your own risk: we are not responsible for leaks or damage to other hardware.
      Is shipping free?
      Shipping is free on orders over $125 to addresses in the lower 48 US states.
      Are printed instructions included?
      No printed manual is included. Installation references are in the product gallery images, and the install guides on this site cover the process step by step.
      Do I need anything else to use it?
      A water block is one component of a loop: you also need a pump, a radiator, fittings, tubing and coolant. If you are starting from nothing, an AIO or a distro-plate kit is the shorter route — ask and we will spec it.

      Ask us before you order

      Send your exact hardware model and we'll confirm the right part before you spend $11.99 — or tell you honestly that this isn't the one.

      Returns are accepted within 30 days and are easy to start in the support center. Unopened items can be returned for store credit with no restocking fee; other returns carry a restocking fee, higher for items that have been installed or used.

      Ask about compatibility