• FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards
  • FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards (view 2)
  • FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards (view 3)
  • FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards (view 4)
  • FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards (view 5)
  • FormulaMod Bykski RTX 3090 full-cover GPU waterblock — silent AI revival for used cards (view 6)
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Bykski GPU Water Block For GALAX GeForce RTX 3090/3080Ti HOF Extreme, Full Cover Cooler with Backplate, N-GY3090HOF-X

Bykski GPU Water Block For GALAX GeForce RTX 3090/3080Ti HOF Extreme, Full Cover Cooler with Backplate, N-GY3090HOF-X

$131.94 USD
$131.94 USD
Sale Sold out
Shipping calculated at checkout.
Lighting System
Option

N-GY3090HOF-X_RBW

Compatibility:

(Including but not limited to the following models)
Galax RTX 3090 HOF Extreme Limited Edition
Galax RTX 3090 HOF Extreme 
Galax RTX 3080 Ti HOF Extreme 

After narrowing your selection, please check the entire PCB picture to ensure compatibility. If you have any questions, don't hesitate to contact support for confirmation.
Compatibility based on this(these) PCB designs only.
Inlet/outlet port size: G1/4" thread.

Frequently Asked Questions

Is this waterblock compatible with my RTX 3090?

This Bykski waterblock is designed for the RTX 3090. Check the product title for specific card brand compatibility — non-reference PCB designs (ASUS Strix, MSI Suprim, etc.) require model-specific blocks. Reference/Founders Edition cards use a different block.

How much quieter will my RTX 3090 be with water cooling?

Stock RTX 3090 coolers run at 45-65 dBA under sustained AI workloads like Ollama or Stable Diffusion. A full-cover waterblock reduces noise to under 30 dBA — quieter than a refrigerator. VRAM temperatures also drop from 90°C+ to 60-70°C, preventing thermal throttling during long inference sessions.

What else do I need for a complete loop?

Besides this waterblock, a complete custom loop needs: a radiator (360mm minimum for 350W TDP), a D5 or DDC pump with reservoir, G1/4 fittings (8-12 pieces), tubing (soft or hard), and coolant. FormulaMod carries all components — browse our AI Workstation Cooling collection for complete setups.

Can I run this 24/7 for AI inference?

Yes. Water cooling is designed for sustained loads, unlike air coolers which rely on fan speeds that create noise. A properly maintained loop can run 24/7 indefinitely with coolant changes every 12-18 months.

Does FormulaMod ship to the USA and Europe?

Yes. We ship worldwide from our Shenzhen warehouse. USA and EU orders typically arrive within 7 days. All products are covered by our return policy.

Why Water Cool the RTX 3090?

350W TDP under AI load
24GB VRAM (throttles at 92°C)
<30dB With water cooling
- CRITICAL: backside GDDR6X memory modules have no heatsink contact on reference PCB — junction temps hit 104-110°C under sustained load, the root cause of the infamous '3090 VRAM throttle at 92°C' — full-cover waterblocks directly resolve this
- Thermal pads on 2-4 year old used 3090s are degraded; installing a waterblock = complete thermal reset, revives ex-mining/ex-gaming cards for AI duty
- 350W sustained for 24/7 Ollama inference = 55 dBA fan noise from the triple-fan FE cooler — unacceptable for home office/bedroom
- Dual-3090 builds (700W total GPU) are the cheapest path to 48GB VRAM for 70B LLMs — water cooling is the only way to fit both in a normal case
- #1 target for FormulaMod — the largest used-GPU waterblock upgrade market in existence

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

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