After Installing amd fan over gpu(i removed the gpu fan)i get optimal frequencies as Core clock - 266 and mem clock - 396 (previous without amd fan(default) core clock - 261 and mem clock - 386.but,the overclocking to 346 and 411 didnt change.it didnt go any further than these values after amd fan installation.

should i remove amd fan and place an external cpu fan(the similar fan installed to proc)?and shud i put the original gpu fan to gpu back?