2 network cards on one pc

Hi, because of missing high speed internet, i was forced to order 2 internet lines with each 3/1 mbps. I put a second lan card in my PC.
I also found forcebindip to use both lines, but I cant make it to work correctly. Is there any way to configure my PC, that one specific website does permanently on startup use one adapter and a second website the second adapter. I use always the same websites for live video chat, so each one must have at minimum 1mb upload. For this i need 2 lines. Thanks for any advise

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I'm going with no.

Given the decades of priors on this, it's not a feature of Windows and given the time span it must be no.

There are some high end routers that do connection bonding.

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dialup used to do that in 90's

2 ISA or PCI cards on same bus, two incoming phone lines, both modems were shared and got over 100kbs speed.

I've not tried this, but two LAN cards on the same bus might do the same. I have tried having both wireless and wired access on both at the same time and it seems either can be used at the same time, but not sure BOTH are used at the same time. I can unplug either the wifi or the wire and not miss a packet in transit, but it's all going through the same router. Having two routers on entirely different lines, not too sure that would work to share packets and break in either line would stop some packets from arriving.

Interesting question.

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