Gtx 980 overclocking not consistant

predater

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May 28, 2009
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I have a custom system. Recentlypurchased a gtx 980 by evga and used evga precision to overclock the gpu.. And i used the heaven benchmark and started out with a score of around 1456 and after overclocking until i couldnt squeeze any more score out around 2234 score.. I then saved the settings and restarted the pc and did the benchmark again with the same overclock settings and it only scored 1673... Am i doing something wrong? Shouldnt my gpu be fairly consistent here?