i would just leave the voltage alone, but theere is a reason i want to increase it. the cards are overlocked, my GPU clock and memory, it is stable in everyway i tested it, weather running benchmark programs or playing computer games. but there is one problem, one of my favourite computer games crysis has continuely started to crash. it goes to windows and gives the display driver stopped working. normally i would think that my memory clock or gpu clock are too high, so i decrease the value. it is not because of that. so i started to read forums on people having the same problem. eventually everyone concluding that this game has this problem on stock voltage setting. so they sujjested to simply increase your voltage as little as possible. on the forum i ready this resolved the issue on every case. therefore i thought it would fix it for me also.