[th3typh00n]

Aside from the cost, ACQ107 is not very reliable in my experience. I have one that randomly drops the connection every now and then, even at sub-10Gbps speeds. Switching to a different NIC makes everything rock stable.

[CobaltFire]

In my experience (Im running several of these) thats down to heat.

I redid the thermal paste on my cards and haven't had any issues since.

[zamadatix]

I've got several, they've been fine for me. That said modern NIC variants in general seem to be a crapshoot, regardless of speed/price.