Weird OC scores

[GrantSor+1]

I have an MSI GTX 960 100th ME and I decided to overclock it yesterday and I achieved a +193Mhz core and a +30Mhz Mem Overclock that I was sure that I was stable, I tested it in both Kombustor and Cinebench R15 and I was fine playing DOTA 2 ( I am not yet finished DL-ing other games)


Then the launch of WC3 came, following and update with the Game ready driver. with the update I decided to check my max oc( until bsod happens) but first I ran kombustor to check the score again, after 30seconds there was an error of TDR something that kept on popping up but it disappears when I test it on stock clocks. I tried atleast a +100Mhz core / +0mem and it still would pop up. Then I decided to Go for Cinebench, and here were my scores
 

 

105.08 fps - stock (WC3 Driver)

104.09 fps- 193/30 (score Before the witcher 3 driver)

100.55 fps - 150/50 (core/mem)

102.03 fps- 160/50 (WC3 Driver)

99.7 fps - 170/50 ( WC3 Driver)

99.63 fps -170/0 (WC3 Driver)

Is this a possible issue? I was confident on my previous Overclocks

I didnt installed Unigen valley/heaven since It keeps on crashing before finishing the benchmark ( even on stock clocks, even tried it on my previous 270x)
As for 3DMark I cant afford it yet.