^You aren't only one with Tonga.
It's true that this chip is inferior than Tahiti's, but man 160 hash/s is pretty low. Make it at least 220-230 h/s.
I have 220 with R9 380 (w/o 'x') on v.12.
How do you reach 220 h/s? The only way I've been able to achieve that rate is by running optiminer with my Gigabyte Radeon R9 380x 4GB OCed to the 1080/1550 with the 15.12 driver. The same setup with Claymore only produces 196 - 200 h/s for me. I can't use optiminer though, it constantly BSODs Windows 10 on my box or the optiminer thread hangs and has to be restarted. This happens to me every 2-3 hours, which is why I have stayed loyal to Claymore, it's just more stable for me. Please share how your achieving 220 h/s with a Radeon R9 380 on Claymore v12. Thanks!