Will this reduce noise on my RTX 4080 SUPER during AI workloads?

Yes. Stock RTX 4080 SUPER 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 GPU Water Block For Gigabyte RTX 4080 Super Gaming OC 16G, Full Cover With Backplate PC Water Cooling Cooler, N-GV4080SGMOC-X

$131.94 USD

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Shipping calculated at checkout.

Lighting system RBW(5v 3pin)

GPU block option With backplane

Extra option None Additional light controller (optional for without light sync)

SKU:N-GV4080SGMOC-X_RBW

The Bykski full-cover GPU water block for the RTX 4080 replaces the stock blower or open-air cooler with a direct-contact copper cold plate pressed against every major heat source on the card — GPU die, VRAM modules, and VRMs in a single pass.

Running local AI inference continuously pushes GDDR6X VRAM toward the 92°C throttle threshold within minutes on air. Water cooling keeps VRAM well below that ceiling, sustaining full memory bandwidth through long Ollama sessions, ComfyUI queues, and overnight batch jobs. The included backplate reinforces the card and aids rear-VRAM cooling.

Drop the loop noise below 30 dBA — quiet enough for a bedroom or shared home office even under 24/7 AI load. Material: nickel-plated copper cold plate, acrylic/POM top. Fittings: G1/4 thread. Ships worldwide.

Frequently Asked Questions

Is this waterblock compatible with my RTX 4080 Super?

This Bykski waterblock is designed for the RTX 4080 Super. 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 4080 Super be with water cooling?

Stock RTX 4080 Super 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 320W 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 4080 SUPER?

320W TDP under AI load

16GB VRAM (throttles at 92°C)

<30dB With water cooling

- 320W sustained means triple-fan coolers still audible in quiet rooms
- Full-cover block protects GDDR6X under persistent generative AI load

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

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Bykski GPU Water Block For Gigabyte RTX 4080 Super Gaming OC 16G, Full Cover With Backplate PC Water Cooling Cooler, N-GV4080SGMOC-X