Apply one of the many available (re-branded LVLord scripts or whatever) TCP/IP Patches and nuke the 10 half-open limit and up it to 100 (or something close to that) and see if that helps.
What does your bitcoin.conf file look like ? What is the MAX RPC Connection limit ? RPC Timeout Value ?
My 'Solo Server' is also a Windows box, but in Server 2008 32bit flavour and I run 15+ cards, with 2-3 threads per card (using CGMiner) to it without any problems, although it took me some time to fine tune things - but it works great now.
Start with the basics above and make sure all bases are covered.
Hi bitlane,
no, it is not the 10 half-open tcp/ip connection limit, I did increase that limit to 256 with no differences at all.
You can see my .conf file here:
https://bitcointalksearch.org/topic/m.614525
In the end I installed a linux PC and now everything works ok.
Thanks.
spiccioli.