How to identify RAM chips on PCB?**How do you line these things up????**

[imagoon]

So you didn't use actual solder balls?

The balls came in yesterday and I gave it a quick run though. Looks like I had the heat up a bit too high and the balls overmelted.

You should use them if you want a strong connection because they are all the same size and should heat pretty evenly / melt at the same time. Smaller chips you can cheat and place your own but your failure rate will generally be higher.

 

[Rubycon]

Looks fairly sparse as far as density is concerned.
Do you have other parts to practice with?

 

[rudeguy]

Looks fairly sparse as far as density is concerned.
Do you have other parts to practice with?

I have basically an unlimited supply of broken terminals to loot boards from.

And the density is tight.

.75 mm pitch and .3 mm posts