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That Fleetwood Mac Thing

on October 29, 2020

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Playing with "Love That Woman" by Fleetwood Mac

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Location: Balchik, Bulgaria

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One water block per mining rig?

Being the PC cooling freak that I am, I totally had to play with this. Namely – cooling a set of crypto-mining GPUs. The plan: shape a system of copper pipes into a single heat sink unit, providing 1x water input, 1x water output and multiple GPU interface surfaces. The result was the following module that can for example be assembled in a set of 4 or 6 pieces in parallel. I'm not keen on investing in mining equipment, so I got three faulty Radeon r9 270s from Ebay. All of them had artifacts; I baked them all into submission, then wasted two of them because of being careless, and finally did some testing with the third one. (more on the baking in an upcoming post) Pipe diameter: 15 mm Thermal performance: Temperature delta of about 20-25 °C (water/GPU) , using 1x water block module and a 15W water pump (1000 l/h, 1 m h-max). Le scientific measurement equipment Equipment: Butane torch Sandpaper Baby vice + hammer + biceps + imagination (the DIY

Testing DDR3 power consumption

Did a little power consumption testing of 6 different SODIMM DDR3 memory modules. Here are the readings of a Kill-A-Watt kind of device, measuring Watts on a Fujitsu Lifebook s792. - First reading is Watts at idle. - Second reading is average Watts while running MemTest+ 5.01. Hynix 1Rx8 2GB 10600-9-10-B1 (HMT325S6BFR8C-H9 NO AA) Idle: 9.6 / Load: 21.6 - 21.8 Samsung 2Rx8 2GB 10600S-09-10-F2 (M471B5673FH0-CH9) Idle: 9.6 / Load: 24.0 - 24.5 Kingston 2GB 2Rx8 PC3-10600S (SNY1333D3S9DR8/2G) Idle: 9.8 / Load: 23.2 - 23.7 Kingston 8GB 12800/1600MHz (KVR16S11/8and lots of other seemingly random numbers, see pic :) Idle: 9.8 / Load: 24.2 - 24.6 Hynix 4GB 1Rx8 PC3L-12800S-11-13-B4 (HMT451S6BFR8A-PB NO AA) Idle: 9.6 / Load: 23.5 - 23.9 Samsung 4GB 1Rx8 PC3L-12800S-11-12-B4 (M471B5173QH0-YK0) Idle: 9.7 / Load: 23.7 - 24.1 Some takeaways: Size doesn't seem to make much difference. Even the count of memory chips doesn't seem to matter much if at

Baking HD 4870

Another go at baking a broken GPU. This time it seems that I finally overdid it And it looks like it... Yummy smelly soldering flux, anyone? Model: Radeon HD 4870 / Sapphire HD4870 512MB (the red one) Price: 5,99 EUR incl. shipping (ebay.de) Symptom: Artifacts, hardware not properly detected Ye Olde Artefacts. Cool mouse cursor though. I baked this one twice: 1. On the first go I used somewhat lower temperatures than usual. Cranked the oven thermostat up to 190 °C, then waited about 15 minutes after the thermostat reached target. Video card in a metal tray, top tightly covered with aluminium foil (see picture further below) Before the baking: an awful lot of stinky soldering flux. Now, I have to admit, I kind of lacked the concentration on this one. I really wanted to get an accurate estimation of the oven temperature, so attention was all about the thermometers I had set up. It turns out to be not at all that easy to make sure a certain te

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That Fleetwood Mac Thing

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