Cooling a 68040 CPU with a Big Copper Heatsink @JDW-
Cooling a 68040 CPU with a Big Copper Heatsink  @JDW-
Uploaded November 2022 | Updated September 2026, 2 weeks ago
Watch me install a 60mm pure Copper heatsink on a 68040 processor using Thermal Glue and MX-4 paste, then temperature test.

🔎 INDEX
0:00 — Overview
5:20 — Why 60mm?
6:16 — Thermal Paste Spread Tests
7:46 — Old Heatsink Removal Surprise!
8:56 — Cu Heatsink Bottom is Machined
9:22 — Pasting & Gluing
13:07 — Socketing the CPU
14:05 — Fanning the CPU
15:19 — Initial Test
17:47 — Temperature Measurement
22:05 — Final Tests & Total Replay II
31:04 — Test Results
31:22 — Closing Words

🛒 STUFF TO BUY
• 60x20mm Pure Copper HEATSINK: bit.ly/3TnKyMJ
• MX-4 Thermal Paste (lasts 8 years!): amzn.to/3FvZgjJ
• Thermal Glue (Halnziye HY910): amzn.to/4iKCmDo
• C-clamp: amzn.to/3A6VQ15
• Nylon Spacer Kit: amzn.to/3DWaKZb
• Thin Plywood: amzn.to/3fYSE0O
• Clear Disc (Choose: 5mm thick, D=80mm): bit.ly/3E2gDUK
• Noctua 40x10mm Fan: amzn.to/3fXH6L6
• Spicy O'Clock overclocker: bit.ly/3Eor3zC
• 60ns 512K VRAM (Kay Koba): tinyurl.com/42vzj5vj
• 60ns 512K VRAM (Silicon Insider): ebay.com/itm/116435221772
• 60ns 512K VRAM (Drake/BetterBit): bit.ly/3LTNoa3
• FlippyFloppy external port for FloppyEMU: bit.ly/3EkeNzX
• FloppyEMU (Model C): bit.ly/2BA8yru
• Fluke 116 Multimeter w/Temperature Probe: amzn.to/3O5IsQx
• LR44 3pc Battery Case (PRAM batt. replacement): amzn.to/3pi30xe
(If your CC is put in storage, note that battery life for 105mAh LR44's is just over 3 months, while 150mAh LR44's yield a battery life of almost 5 months. The PRAM battery is not drained when connected to wall socket power and with the CC switch on back flipped ON.)
💵 Some links above lead to Amazon USA. If you click those and purchase within 24 hours, Amazon may pay me a small commission on qualifying items in your Cart.

📚 REFERENCE
• YMK show me how to do it here: bit.ly/3tmfanp
(YMK makes MacSD: macsd.com )
• Mr. Fahrenheit identifies Fake 68040 CPUs here: bit.ly/3EkUbHU

💾 SOFTWARE
• Total Replay II (Autobahn & Winter Games shown in video): bit.ly/3UoQEhg
• Total Reply: bit.ly/3hri3At
• Joystick Calibration: bit.ly/3G7h4jq
• Norton System Info 3.5: bit.ly/3A6lFOW
• MacBench 3.0: bit.ly/3G5zOja

🙏 SINCERE THANKS to these recent Paypal supporters:
• Chris Angellis
• Mauro Acciaccaferri
• Philippe ASTIER
• Gavin Maxwell

🙏 BIG THANKS to YMK Devices for kindly teaching me how to do this.

💰HOW TO SUPPORT THIS CHANNEL
paypal.me/supportJDW

📺 Please SUBSCRIBE:
youtube.com/c/JDW11/?sub_confirmation=1

🎬 MY VIDEOS
youtube.com/user/JDW26/videos

🎶 Music Credits
• These 2 are CC BY-ND 3.0 by Anders Enger Jensen: bit.ly/3JPllrk
1. Smooth Bed 2
2. Smooth Bed 1
• All others from: bit.ly/3g5Afzh

#68040 #Heatsink #ColorClassic #JDW1
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Cooling a 68040 CPU with a Big Copper Heatsink

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