Match the label
Use the exact board number and the measurements already sent to Quarkpad. A GPU family name is not enough.
Home AI cooling checklist
Cool a passive GPU.
Without guessing.
Board label. Airflow. Fan power. Cable path. First load.
P40-class remains measure first. V100 PG500-216 R3 is research only. This guide does not change either status.
Before mounting
Board
Room
Cable
Three checks first.
Keep service space
The live shrouds add about 54mm plus your fan. With a 25mm fan, plan 94mm including working room.
Show the bend
The power connector, fan lead, side panel, and nearby card must stay clear before the shroud is secured.
Fan power
Read the header manual.
All seven reference fans are 12V PWM models. Current is not the same. Add every fan on the controller and stay within its documented rating.
Count fan current. Exact P40? Check the card power plug separately. Manufacturer figures only. No electrical approval.
Arctic P8 PWM PST CO
80×25mm
0.09A listedManufacturer specsArctic S8038-7K
80×38mm
0.50A listedManufacturer specsArctic S8038-10K
80×38mm
1.30A listedManufacturer specsArctic P9 PWM PST CO
92×25mm
0.12A listedManufacturer specsArctic P12 PWM PST CO
120×25mm
0.10A listedManufacturer specsArctic S12038-4K
120×38mm
0.60A maximumManufacturer specsArctic S12038-8K
120×38mm
3.20A maximumManufacturer specsDo not guess.
Never force a connector, splice a live cable, or use a GPU-board fan header without its exact electrical documentation. The S12038-8K lists 2.20A and a 3.20A maximum. Check the exact source, connector, cable, fuse, shared loads, and startup demand. Every fan is buyer supplied.
Install
1
2
3
4
5
6
Six plain steps.
Shut down
Power off, unplug, and let the GPU cool. Work on a stable, nonconductive surface.
Dry fit
Place the shroud without force. Stop for scraping, rocking, a gap, or a blocked connector.
Choose direction
P40 and V100 PCIe heatsinks accept either direction. Match the fan arrows to the chassis airflow.
Check power
Confirm 12V, connector shape, total current, startup demand, and the header or controller limit.
Secure it
Tighten evenly. Do not crush the cooler shell. Route every lead away from blades and hot parts.
Spin check
With power still off, turn the blade gently. It must move without wire, screw, or shroud contact.
Airflow basis: NVIDIA documents bidirectional airflow for the Tesla P40 and Tesla V100 PCIe. The rest of the chassis still needs one deliberate intake-to-exhaust path. Read the proof record.
Before load
Eight checks. One stop.
Local. Nothing saved. Owner check only.
First power-on
Watch it before load.
Start the system with the case open only if the chassis instructions permit it. Confirm the fan spins, the cable stays clear, and the airflow goes through the heatsink.
Read-only NVIDIA monitor
nvidia-smi --loop=1Verify fan operation before starting work. Record response. Begin short and watch temperature, power, and thermal-event output.
Budget row airflowCheck a saved load logRecord the first load manuallyMap the physical rowStop immediately for:
fan stoppage, blade contact, cable movement, burning smell, electrical noise, thermal slowdown, shutdown, or a temperature that keeps climbing without settling. Do not leave the first load unattended.
Something off?
Message Quarkpad on eBay Stop. Send a photo.
For an existing order, keep the board label, installation photo, and help request inside eBay Messages.