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Green & brown

Green & white

Brown both sides

Green both sides but nothing noticeably valuable.

Large Green both sides with what appears to be large amounts of gold on and in both sides (lines/tracing??) but still has AL/Cop/Steel pieces, covers & transformers.

What I can't figure out is which or how much metals/alloys to remove from which boards if anything at all. Some sources say just pop metal covers/shields off, some say do nothing and I've read take off all metals to upgrade??

I take off al/cop from what I think are low and mid grade (a lot look like they have gold and are green or blue on both sides) I leave steel and large transformers/capacitors & get .10/lbs. for a mix of these variations.

I take in at least 200lbs of this mix described at a time and feel I may be missing profits this way as I'm taking off large coppers and aluminums then leaving the rest of the weight. I can knock the rest of the weight off without destroying the board and get paid for the different things separately, but the best thing I've been aware of is to save the alloys leave everything else and get .10 from the only place by me that'll take it. They take better board but won't pay more no matter what it is.

Below are types I'm needing to know how to sort as is, orr if its possible to make them better.

First photo are all power boards and are low grade. There's nothing there to bump it.
Second set left to right
Peripheral is my guess (barely)(ic content)
Peripheral
Peripheral
Peripheral

The little protocol i/o board is also peripheral if the pins in the housing is gold. Midgrade if silver/nickel-tin. If you can't tell look at the ends if the attached ribbon cable. Metals usually match gold2gold etc.

Way to go with your quick response thanks my friend. Necessary to remove metals off of the better boards or not usually? And do I have to remove anything from low boards if they can't be bumped to mid? My confidence in sorting gets easily shaken when I read about exceptions and can't seem to properly sort one. I think the motherboards are pretty obvious to grade but I have been saving some I think are motherboards but I don't see a cpu that can be unmounted..they came from early 90's comps.

The tiny board does have two ribbon connections with golds in both so thanks again for the help.

Nothing has to come off low grade boards. The shield in the peripheral pictures could probably be removed (and should id it's just a top piece on a frame. Pop the top off if you can.

If you have those motherboards the actual cpu usually fits into a socket (big white or grey square). If not post a picture and we'll figure it out together.

Ok I will you're a big help on here I see. Also it's not that I can't get them off it's that I don't see them..

Those are large socket motherboards. The cpu is a slot cpu or riser board unit that slides into the big card socket

Uh oh I've mixed the slot cpu's into the metal bracketed peripheral finger cards then I think whoops.

Two types of "cards" go in those sockets, green fibre cards (like the first photo, but with fingers) would be telco class.

And slot processors like the second photo. Go as slot processors.

Thanks so much that's gonna help when I get back to the box I put the similar looking ones in.

Just a hint for one more class of motherboard, some mid-90s hp, Compaq, and IBM boards have a socket twice that length for a riser. That also usually gets large socket class for the board and the card that goes in it will be either backplane (many ports) or telco class (controller and memory cards).