Bykski GPU Block With Active Waterway Backplane Cooler For Zotac RTX 3090/3080Ti/3080 Apocalypse, N-ST3090TQ-TC
Bykski GPU Block With Active Waterway Backplane Cooler For Zotac RTX 3090/3080Ti/3080 Apocalypse, N-ST3090TQ-TC
SKU:N-ST3090TQ-TC_RBW
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The Bykski N-ST3090TQ-TC is a full-cover GPU water block with active backplane cooler engineered specifically for the Zotac RTX 3090/3080 Ti/3080 Apocalypse series. Unlike reference designs that leave backside GDDR6X modules thermally stranded—driving junction temps to 104-110°C and triggering VRAM throttle at 92°C—this block presses nickel-plated copper directly against every memory chip, front and rear, delivering sustained thermal headroom for LLM inference workloads that run hours or days without pause.
Silence is mandatory for home AI labs. Stock triple-fan coolers scream at 45-65 dBA under sustained 350W loads; this water block drops operation below 30 dBA, making bedroom and home office deployments viable. For used RTX 3090s with degraded thermal pads from extended workload duty, installation performs a complete thermal reset—restoring full performance for Ollama, Stable Diffusion, and local LLM hosting.
Multi-GPU necessity resolved. Dual RTX 3090s pull 700-900W combined—no air solution exists for two cards in one case. This block's slim profile enables dense parallel inference rigs that would otherwise require impossible airflow. 24/7 reliability demands sustained thermal margins, not bursty gaming headroom; the active backplate ensures GDDR6X never throttles during extended model training or token generation.
Nickel-plated copper base. G1/4 threading. Integrated backplate with active waterway. 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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