Here's a teaser. I've done just about as much as I can for the moment.
I could tidy it up a bit and make some bits more pretty.
If I recall correctly this is the top and bottom layers with solder paste.
The middle layers aren't shown. Note that data signals will be on a middle layer.
And I'm still playing with the connector area. I may put pads for an SMD barrel jack at board edge next to PCIe power so that those who want no thru holes (due to heat sink) can use that. I could find no SMD mount PCIe connectors so best bet there is to drill the heat sink or put copper pads between it and the board. Kind of a nuisance really.
I should have changed the name of that silly 1PIN hole footprint.
I love it! :-)
4x4 thermal vias under each asic, nice!
Heatsink-holes, usable for aligning the stencil? Great!
I would love an smd barrel-jack! There seems to be some space left free left of the pci-e powerconnector?
If the pci-e powerconnector isn't populated, do you think the solderpoints would short on a flat heatsink? The soldermask adds some tiny space, and ignoring the thermal compound and oxide layer in between too.
All in all there seems to be quite some space unused. Of course the other layers are not visible here, though. Considering the original avalon module is 37mm wide (for 10 chips only)..
Nah, ignore that, you know what you're doing, BKKCoins! :-)
To repeat: I love it! :-)
edit:
About aligning:
The solder pads are tiny. What do you guys think, would the holes be positioned precisely enough to align the stencil with them? That would help a lot! If we can define a narrower tolerance for the (4 corner) holes I would gladly pay extra.
Oh, and +1 for larger physical capacitor size etc ;-)
Ente