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- fan control for gigabyte motherboards
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- pc passive cooling system
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When it comes to cooling our solar-powered PC, we could have taken either of two basic approaches: either cool the processor actively with a cooler, or construct some kind of passive cooling system. To help decide which way to go, we measured the processor's energy consumption at various temperatures.
We have measured the energy consumption of the processor under different temperatures.
Energy consumption for a passively and actively cooled processor
The stock cooler included with the processor consumed about 1 W at maximum fan rotation. If we used a passive cooler instead, the energy consumption of the Athlon 64 X2 BE-2350 increased by about 1.1 W in "Cool and Quiet" mode, and by a hefty 12 W at full load.
CPU and cooler on the test system motherboard
CPU and cooler on the test system motherboard
Although the CPU cooler fan consumes a steady stream of energy, the use of processor power decreases when it's active. Because our Gigabyte motherboard includes a fan controller, the fan is also very quiet. Thus, we decided to employ active cooling, due to the better energy budget it gave us to work with.
| 12 Volt Solar-PC-System | ||
|---|---|---|
| Component | Idle | Max load |
| PSU | 5.00 W | 14.20 W |
| CPU | 8.49 W | 38.66 W |
| Cooler | 1.00 W | 1.00W |
| Total: | 61.23 W | 115.60 W |
| max. 160 Watt Custom PSU | ||
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i bought this M2-ATX PSU (actually to of them). but i was unable to start it.
1. first quick question: is it possible to start (for testing purposes) the PSU without connecting it to the computer? is it enough to short circuit J8 only to start?
2. docummentation is unclear about 10 (J6). it looks like J6 is purely for controlling stereo amplifier. but other place of the manual says "if J6 is cnnected to the motherboard". where to motherboard?
3. how should PSU be connected?
for testing i have taken 12V 7Ah lead acid battery fully charged.
connected battery "-" to J4.
battery "+" to J1.
J3: tried to leave not connected and tried to connect battery "+".
disconnected power switch cable from motherboard and connected it to J9.
connected J8 with motheboard (using little cable included in the package) where power switch was originally connected.
left J6 not connected.
J10 not connected (P0 mode). also tried P1 mode.
connected ATX and P4 (J2).
pressed power on my pc but nothing happened and no voltage on MOLEX cable.
could authors of the article (or maybe other owner of the PSU) describe how did they start the PSU?