@muhammet topcu i have an asus 750ti oc version and i have been keep overclocking harder and harder my video card, but always safely, i have read a looooooot of things on internet even before downloading afterburner for the first time (and i guess this is the real first step for overclocking, but if you are searching for performance increase you need a lot of steps more) for what i know, if you get 44°C max during gaming, i would say you need to try more games with more graphic settings (every graphic setting beginning with shader model, stress the video card more or less) you need to say what fan setup you did use to get max 44°C max , because if you are at 44°C with 100% fan it's one thing, if you are at 44°C with 20-30% fan it's another thing XD. your overclock is pretty average/low for a semi-stock-voltage overclock, im thinking you didn't mod the bios either so that's why your temps are still very confident. 1328 clock 1500 memory is yeah a bit overclocked but with a bios modding working on TDP/Voltage core clock memory clock table clock u would get very much more performance.
what i did on my bios was : voltage 1.2v progressive and lowering depending on the video card states, tdp 75500 W power target to 80500w (106%) , boost table 1398 core clock, 6000 memory(i oc to 6500 or more with afterburner) save, right click table clock fix invalid clock save again. plus using force costant voltage on afterburner, enabling msi extended voltage control, voltage control, voltage monitoring and kernel access to vga.
my daily overclock is 1398 core 6500(1625) memory , another thing, nvidia control panel settings (AA , anisotropic filter. structure filter quality and every setting included colours quality in a small part) counts for how high can your max stable overclock be and how high can your fps be and your score in benchmarks too, with this core memory i keep nvidia control panel on Full quality (AA 8x, anisotropic filter 16x, filter structure high quality FXA on Etc) and i have used it for play more to 4-5 different games with high quality graphics setup for a lot of hours (after had test it before on several benchmarks and furmark(furmark only for some minutes, yes i know im the first one saying it burn video cards if used for more to some minutes)
for how i modified my bios, and my afterburner, if i set nvidia control panel to Full Performance settings, and i mean everything on max performance possible, i can run 3dmark firestrike 1476 core 3000 memory with a nice result, but especially i can run 3dmark firestrike at: 1450 core 6900 memory, with this score:
http://www.3dmark.com/fs/5234200
try running 3dmark firestrike your own and watching the score you get, remember to focus on the graphic score because it only say what is your videocard power, physics score and combined score change too much depending on the cpu/cpu oc, general computer performance included anything.
my stock clocks were 1150 boost 1072 core 1350 memory too so i think you can match my overclock performance, and believe me it's not unsafe, i use fan from 60% to 90% progressively (90% @ 70°C) but exception made for benchmarks where card reaches barely 66-67 °C ive never seen it over 50 , extremely rarely 60-61 degrees after several hours of intensive gaming, there is no need to pump temps lower, a video card begin damaging at 95-98 °C , it blows at 110°C + like most of people say there, anyways since my card is lower to 70°C in every condition of use and super stress, i can easily say 750 ti is a super good card to overclock , save energy and keep low temperatures.
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