Bykski GPU Water Block For Asus ROG Strix / TUF RTX 4090 , Full Cover With Backplate PC Water Cooling Cooler, N-AS4090STRIX-X-V2
Bykski GPU Water Block For Asus ROG Strix / TUF RTX 4090 , Full Cover With Backplate PC Water Cooling Cooler, N-AS4090STRIX-X-V2
SKU:N-AS4090STRIX-X-V2_RBW_BK
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The Bykski N-AS4090STRIX-X-V2 full-cover water block is engineered specifically for ASUS ROG Strix and TUF RTX 4090 cards running sustained AI workloads—Stable Diffusion, LLM inference with Ollama, and local model training at 450W TDP.
Silence is mandatory, not optional. Stock triple-fan coolers scream at 50-60 dBA under sustained AI load; this water block drops operation below 30 dBA, making 24/7 bedroom or home office deployment actually tolerable. VRAM protection prevents throttling. GDDR6X junction temperatures spike past 90°C during hours-long inference sessions, causing clock drops and slower token generation. Full-cover copper construction presses directly on all 24GB of VRAM modules, eliminating thermal throttling entirely.
Built for continuous operation. Unlike gaming's bursty thermal cycles, AI inference demands stable temperatures for hours or days—this block delivers sustained thermal headroom that air simply cannot match. Multi-GPU scaling requires water. Dual RTX 4090 configurations (900W+) in a single case are thermally impossible with air; this block enables dense, local AI clusters without rack infrastructure. Nickel-plated copper base, G1/4 threading, integrated aluminum backplate for VRM cooling. Ships worldwide.
Frequently Asked Questions
Is this waterblock compatible with my RTX 4090?
This Bykski waterblock is designed for the RTX 4090. 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 4090 be with water cooling?
Stock RTX 4090 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 450W 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 4090?
- 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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