What rez are you working at? If you're working at native 72 dpi, try working at a higher rez (150+dpi) and then using Save For Web. Also check in your Preferences that you have AA set properly.
This job would be great if it weren't for the f***ing customers. - Randal Graves - "Clerks"
Rig: Gigabyte X99-UD5 WIFI (rev 1.0, F10b) | Core i7-5820K @ 4.3 GHz | Scythe Mugen 4 cooler | 16GB Crucial DDR4-2133 15T | ASUS Strix GTX980 OC 4GB | Crucial MX100 256GB SSD (boot) | Toshiba 2TB 7200RPM HDD (data) | 850W EVGA SuperNova 80+ Bronze | Thermaltake F51 Suppressor Window | Windows 10 Pro x64 | Dell U2410 LCD | Logitech Z-580 5.1 | Logitech G700s