typically playing SOLO at approximately 25 fps, sometimes as low as 5-10

I have 4 bars of connection at nearly all times, so I doubt it's a connection issue

Checked for driver updates, java, etc, closing web browser, and lowering settings probably helps but that doesn't actually fix the problem, just the symptoms.

Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_gdr.130318-1532)
Language: English (Regional Setting: English)
Processor: n/a (4 CPUs)
Memory: 6144MB RAM
Available OS Memory: 6072MB RAM
Page File: 15635MB used, 1424MB available
DirectX Version: DirectX 11

Card name: AMD Radeon HD 6670
Display Memory: 3793 MB
Dedicated Memory: 1013 MB
Shared Memory: 2779 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)