Am i ok to oc further?

My build:
PSU: Corsair 430x
GPU: R7 260x
CPU: amd x4 760k
RAM: 8b ballistix
120gb ssd
Cooler: Thermaltake (idk the exact model)
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Im at the moment overclocked to 4.1 GHz
and small oc on the gpu..
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Could i oc to 4.2-4.5 w/o any problems?
im not planning to oc the gpu any further.
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I replaced the thermal paste yesterday.
 

i went ahead and tried 4.2 and 4.3 but they just decreased my fps in games so i stick with 4.1ghz ty for help