Is this waterblock compatible with my RTX 4090?

This Bykski waterblock is designed for the RTX 4090. Please check the product title for specific card brand compatibility (ASUS, MSI, Gigabyte, etc.) as non-reference PCB designs require model-specific blocks. If you are unsure of your card's PCB variant, contact FormulaMod support at customermanager@formulamod.net before ordering.

Will this reduce noise on my RTX 4090 during AI workloads?

Yes. Stock RTX 4090 air coolers run at 45-65 dBA under sustained AI inference loads (Ollama, Stable Diffusion, ComfyUI). A full-cover waterblock like this mounted to a 360mm radiator typically reduces noise to under 30 dBA while also lowering VRAM temperatures from 90°C+ to 60-70°C, preventing throttling during long generation runs.

What else do I need for a complete water cooling loop?

A complete custom loop requires: this GPU waterblock, a radiator (360mm recommended for single GPU, 480mm for GPU+CPU), a D5 or DDC pump with reservoir combo, G1/4 fittings, tubing, and premixed coolant. FormulaMod sells complete kits starting at $249 USD including pump, radiator, and fittings.

Does this waterblock cover the VRAM and VRM chips?

Full-cover waterblocks cool the GPU die, VRAM modules, and VRM components simultaneously via a single block with an integrated cold plate. This is essential for AI workloads where sustained 100% VRAM utilization can cause memory junction temperatures to exceed 110°C on air cooling. The full-cover design distributes coolant flow across the entire PCB thermal zone.

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Bykski All-in-one GPU water cooling, For ASUS TUF/ROG, Water Cooling System Liquid Cooler, 240 360 Radiator, B-FRD-AS4090STRIX

$367.50 USD

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Size 360mm 360mm Thick row(Dual Graphics Cards)

Color Black

SKU:B-FRD-AS4090STRIX-360

Bykski B-FRD-AS4090STRIX All-in-One Liquid Cooler for ASUS ROG Strix and TUF RTX 4090 with 360mm Radiator

TL;DR: AIO liquid cooler for ASUS TUF Gaming GeForce RTX 4090、ASUS ROG STRIX GeForce RTX4090、ASUS ROG STRIX GeForce RTX4090 O24G WHITE、ASUS ROG STRIX RTX4090 O24G GAMING、ASUS ROG MATRIX RTX4090 Hyper-Tech、ASUS ROG STRIX GeForce RTX4090D 24G GAMING. . Nickel-electroplated copper with acrylic and black anodized aluminum backplate (not in coolant). G1/4 threa

Common Applications

AIO liquid cooler for ASUS TUF Gaming GeForce RTX 4090、ASUS ROG STRIX GeForce RTX4090、ASUS ROG STRIX GeForce RTX4090 O24G WHITE、ASUS ROG STRIX RTX4090 O24G GAMING、ASUS ROG MATRIX RTX4090 Hyper-Tech、ASUS ROG STRIX GeForce RTX4090D 24G GAMING. . Nickel-electroplated copper with acrylic and black anodized aluminum backplate (not in coolant). G1/4 thread. Includes mounting hardware, thermal grease, 2 stop fittings, 5V ARGB element. 360mm or 360mm thick-row.

Frequently Asked Questions

Q: Compatible cards?

A: ASUS TUF Gaming GeForce RTX 4090、ASUS ROG STRIX GeForce RTX4090、ASUS ROG STRIX GeForce RTX4090 O24G WHITE、ASUS ROG STRIX RTX4090 O24G GAMING、ASUS ROG MATRIX RTX4090 Hyper-Tech、ASUS ROG STRIX GeForce RTX4090D 24G GAMING.

Q: Materials?

A: Nickel electroplated copper with acrylic; black anodized aluminum backplate not in coolant.

Q: RGB?

A: 5V Addressable RGB (RBW). Not compatible with 12V RGB.

Why Water Cool the RTX 4090?

450W TDP under AI load

24GB VRAM (throttles at 92°C)

<30dB With water cooling

- 450W sustained AI load = 50-60 dBA from the massive triple-fan coolers — unbearable in bedroom/home office
- 24/7 Stable Diffusion inference pushes VRAM to 90°C+ junction; full-cover waterblocks eliminate throttling
- Dual-4090 builds (900W total GPU) are physically impossible in normal cases without water cooling — 3-slot air coolers block each other
- The #1 used-GPU-to-waterblock conversion target — buyers snagging secondhand 4090s want silent 24/7 AI rigs

Full-cover water blocks cool GPU die + VRAM + VRM simultaneously — unlike air coolers that only target the GPU die.

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Bykski All-in-one GPU water cooling, For ASUS TUF/ROG, Water Cooling System Liquid Cooler, 240 360 Radiator, B-FRD-AS4090STRIX