Since yesterday I have hooked up the new RB750iGS the ISP by fiber and so I have installed a SFP module. The temperature readout was 51 degrees Celsius and not extreme hot but hot and summer coming I was thinking of a way to reduce it. On the front there is not much room to attach a heatsink and for that I have look inside.
Then I thought what if I could clamp it on…so I search for a old hair holder and bent the legs to make a good contact and put it on the SFP. It looks nut much but I get a temperature readout of 47 degrees and so having a temperature reduction of 4 degrees.
…removed…
I can surely optimize the contact area and I have thermal glue and I looking now, how I can use the metal section next to the fiber connector to cool even more.
Update:
There is an other reduction in temperature by 3 degrees Celsius. I removed the hair clamp and put two flat heat sinks at the bottom and top. I applied some TIM (thermal paste) on the bottom one and will glue that one to a RJ45 so it will sit snug.
The top heath sink is pushed between the power connector and that one really sits snug at the SFP and needs also some TIM.