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Rectangular electroplated copper block with clear acrylic top and black anodized aluminium backplate

Bykski

Bykski N-ST3090PGF-X full-cover GPU water block for Zotac RTX 3080/3090 PGF OC diy cooling

SKU CH-4W56-WA4XE MPN N-ST3090PGF-X

Full-cover water block directly cools GPU, memory and VRM on compatible Zotac RTX 3080 and 3090 PGF OC cards

  • Product typeCPU Block
  • Full GPU, memory and VRM cooling
  • Electroplated high-purity copper resists oxidation
  • Clear acrylic top shows coolant flow
  • Standard G 1/4in threads simplify loop builds
  • Black anodised aluminium backplate adds rigidity

Precision Fit for Zotac PGF OC

The Bykski N-ST3090PGF-X is a full-cover water block engineered exclusively for the Zotac RTX 3080 and RTX 3090 PGF OC graphics cards. It cools the GPU, memory and VRM through a single electroplated copper cold plate. A clear acrylic top reveals the flow path while standard G 1/4in threads accept common fittings.

Suited for Custom Loop Builders

This block serves enthusiasts building a hard-tube or soft-tube loop around a compatible Zotac PGF OC card. It is not for owners of reference or other partner models, nor for builders who need an air cooler or an all-in-one solution. Buyers without an existing custom loop infrastructure should look elsewhere.

Loop Integration

The block installs directly on the supported Zotac PCB and includes a black anodized aluminum backplate that does not contact coolant. Top and bottom G 1/4in ports allow serial or parallel plumbing across multiple blocks. High-flow internals keep restriction low so a single pump can drive several components in series.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $178.99
Pricier than about 91% of the 609 comparable items (median $15.99).

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Specifications

Product
Product typeCPU Block

Questions about this item

Will this block fit my Zotac RTX 3080 PGF OC without modifications?

Yes, the N-ST3090PGF-X is designed for the Zotac GeForce RTX 3080-10G6X PGF OC and the RTX 3090-24G6X PGF OC, covering the GPU, memory and VRM directly.

Can I keep my existing G 1/4 inch fittings when installing this block?

The block uses standard G 1/4in thread ports on both top and bottom, so your current fittings will connect without adapters.

How do I verify the block is cooling the VRM and memory after assembly?

Monitor GPU core, memory junction and VRM temperatures under load; all three should run below stock air-cooled levels if the block is seated and flow is correct.

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