Already have over 24k in volt coins but can't sell or trade them. Shitt man

please respond will tip

Currently undervolting my card by 11% (can't set voltage with hd 7950s) have core clock at 875 and memory clock at 1250. Temps are at 65-70C. Using GuiMiner scrypt alpha. Thread concurrency set at 24,000 intensity 19 work size 256 vector 1 gpu threads 1 use of stratum yes. Currently only getting between 500-525 khash/s. When I'm reading about people getting 625khash and my model card on the wiki page says I should be getting close to 700khash/s. I have gigabyte's hd 7950 with the three fans. Not sure if this matters but I have a phenom II X4 965 BE, 8gb of ram, 500gb hardrive, running windows 8.1, I used to use this pc for gaming but since I heard about doge/feather/lite coins I thought well I haven't completely missed the band wagon yet. Ordered two more 7950s with water blocks on them for optimal cooling.