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Rectangular nickel-plated copper water block with clear acrylic top, aluminium cover plate and digital-RGB lighting

Phanteks

Phanteks Glacier G4090 GIGABYTE PH-GB4090GB_CR01_BP diy cooling

SKU CH-9W93-EFW8A MPN PH-GB4090GB_CR01_BP

Full-cover water block cools GIGABYTE AORUS MASTER and GAMING RTX 4090 cards with 10 mm copper base and digital RGB sync

  • Block dimensions11.51 × 4.94 × 1 in (292.31 × 125.47 × 26 mm)
  • Cooling block materialAluminum
  • Product typeVGA Block & Cooler
  • Full-coverage water block cools entire PCB directly
  • Nickel-plated copper base transfers heat efficiently
  • Digital-RGB lighting synchronises with Phanteks D-RGB and motherboard Addressable RGB
  • Viton rubber washers maintain seal force to prevent leaks
  • Designed for GIGABYTE AORUS MASTER and GAMING RTX 4090 cards

Full-Cover Water Block for Gigabyte RTX 4090

The Phanteks Glacier G4090 GIGABYTE water block fits the AORUS MASTER and GAMING RTX 4090 cards. A 10 mm copper base contacts the GPU die while the aluminium cover spans the full PCB. Digital-RGB lighting syncs with Phanteks D-RGB gear and motherboard addressable headers. Block dimensions are 11.51 x 4.94 x 1 in (292.31 x 125.47 x 26 mm).

Upgrade from air cooling when thermals throttle

Swapping the stock cooler for this full-cover block removes the factory heatsink and fans, replacing them with a direct-die copper cold plate and extended fin array. The Viton rubber washers maintain seal force under pressure cycles. The jump is worth it when sustained loads push the card past its thermal target and you have a custom loop ready.

Loop flow and clearance set the practical limits

The block adds 26 mm to the card profile, so case and motherboard spacing must accommodate the extra height. Digital-RGB control requires a 5 V addressable header or a Phanteks D-RGB controller. Fittings are not included; buyers must supply compatible G1/4 ports and tubing. First listed by the manufacturer in 2023.

How it compares

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

Price $226.99
Pricier than about 92% of the 609 comparable items (median $15.99).

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Specifications

Product
Brand namePhanteks
Model nameGlacier G4090 GIGABYTE Water Block Bundle
Part numberPH-GB4090GB_CR01_BP
Product typeVGA Block & Cooler
Size & build
Block dimensions11.51 × 4.94 × 1 in (292.31 × 125.47 × 26 mm)
Cooling block materialAluminum
Shipping weight2.04 kg
Package size356 × 191 × 76 mm

Questions about this item

Will the 292.31 mm by 125.47 mm block clear the mounting holes on my GIGABYTE AORUS MASTER RTX 4090?

Yes, the water block is designed specifically for that card and covers the full PCB, so the mounting pattern matches the AORUS MASTER and GAMING models.

Which step do builders most often miss when fitting the nickel-plated copper base to the GPU die?

Many forget to remove the protective film from the copper cold plate before applying thermal paste, which prevents proper contact and leads to high temperatures.

How often should the Viton rubber washers be replaced to keep the seal reliable?

Inspect the washers each time the loop is drained; replace them if they show any flattening or cracking, typically every two to three years in continuous use.

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