What kind of solder do you recommend for soldering motherboard components?
user
Do you have more details about the equipment you will be using, and what temperature range you expect?
assistant
I expect to work under 400 degrees and on a regular desktop motherboard.
user
I would recommend that you purchase solder that has a diameter of 0.45 mm.  This is also known as an “0.45 pitch”.  An “0.5” would also be fine.  You would then pre-tin the connections with solder, a technique that weeds out poor connections.  You would then use a “low temperature” iron that heats up quickly, but isn’t hot enough to melt all the solder.  I’d recommend you use either a 60 watt iron, or a 60 watt iron with a power supply that raises the power to 60 watts for a brief moment before turning it back down.
assistant
What kind of solder do you recommend for soldering motherboard components?
user
Do you have more details about the equipment you will be using, and what temperature range you expect?
assistant
I expect to work under 400 degrees and on a regular desktop motherboard.
user
I can recommend silver solder and an 80/20 mixture, but if you are working in a non-controlled environment it is possible you will have to consider a higher tin/lead mix like 85/15.
assistant
What kind of solder do you recommend for soldering motherboard components?