Bykski GPU Block With Active Waterway Backplane Cooler For RTX 3090/3080 Reference PCB, For GALAXY Palit KFA2 Maxsun Leadtek Gainward, N-RTX3090H-TC-V2
Bykski GPU Block With Active Waterway Backplane Cooler For RTX 3090/3080 Reference PCB, For GALAXY Palit KFA2 Maxsun Leadtek Gainward, N-RTX3090H-TC-V2
SKU:N-RTX3090H-TC-V2_RBW
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The Bykski N-RTX3090H-TC-V2 is a full-cover GPU water block with active backplane cooler engineered specifically for reference PCB RTX 3090 and RTX 3080 cards from Palit, GALAX, KFA2, Maxsun, Leadtek and Gainward. Its dual-sided waterway design directly cools both the GPU die and the rear-mounted GDDR6X memory modules—a critical fix for AI workloads that push 24GB VRAM to sustained 100% utilization.
Reference PCB RTX 3090s suffer a fatal thermal design flaw: backside VRAM chips have zero heatsink contact, causing junction temperatures to hit 104-110°C and throttle at 92°C during long LLM inference runs. This active backplate presses liquid-cooled copper directly against those modules, eliminating the throttle point entirely. For used 3090s with degraded 2-4 year old thermal pads, installation performs a complete thermal reset—reviving ex-mining or ex-gaming cards for reliable Ollama and Stable Diffusion duty.
AI inference runs 24/7 for hours or days, not bursty gaming sessions. Air coolers at 350W TDP scream at 45-65 dBA; this water block drops noise below 30 dBA—essential for home office or bedroom AI rigs. Running dual 3090s (700-900W combined) in one case is physically impossible on air; water cooling is mandatory for multi-GPU local LLM setups.
Nickel-plated copper construction, G1/4 threading, integrated backplate cooling. Ships worldwide.
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?
- 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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