h3sham :
im not an expert but im pretty sure 75 is a tad too high for a GPU , anyway check the dump file and see what the error says exactly , use blue screen viewer , could be a page file error or from what I experienced before a heating problem check the cpu cooler and make sure its seated if it is seated use the bluescreen viewer and see what the error is
I downloaded heres what I copyed. What now?
081413-11434-01.dmp 14.8.2013 13:39:47 DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 fffffa81`086c3870 00000000`00000002 00000000`00000000 fffff880`01950081 gt72ubus.sys gt72ubus.sys+c081 Option N.V. 1.0.0.5 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\081413-11434-01.dmp 4 15 7601 293.624 14.8.2013 13:40:17
081213-11700-01.dmp 12.8.2013 18:22:06
DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 fffffa81`09802950 00000000`00000002 00000000`00000000 fffff880`053e1081 gt72ubus.sys gt72ubus.sys+c081 Option N.V. 1.0.0.5 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\081213-11700-01.dmp 4 15 7601 293.664 12.8.2013 18:22:39
081213-11512-01.dmp 12.8.2013 17:19:22
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED 0x1000007e ffffffff`c0000005 fffff800`02ca0954 fffff880`031bd888 fffff880`031bd0e0 gt72ubus.sys gt72ubus.sys+fdfd Option N.V. 1.0.0.5 x64 ntoskrnl.exe+84954 C:\Windows\Minidump\081213-11512-01.dmp 4 15 7601 293.856 12.8.2013 17:20:48
081113-11590-01.dmp 11.8.2013 17:27:36
DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 fffffa81`091811c0 00000000`00000002 00000000`00000000 fffff880`00df3081 gt72ubus.sys gt72ubus.sys+c081 Option N.V. 1.0.0.5 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\081113-11590-01.dmp 4 15 7601 334.456 11.8.2013 17:28:20
081113-11294-01.dmp 11.8.2013 16:37:03
DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 fffffa7f`ffffffe4 00000000`00000002 00000000`00000000 fffff880`06e4b035 gt72ubus.sys gt72ubus.sys+c035 Option N.V. 1.0.0.5 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\081113-11294-01.dmp 4 15 7601 293.832 11.8.2013 16:37:59
081013-13228-01.dmp 10.8.2013 16:47:23
DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 fffffa81`070e5270 00000000`00000002 00000000`00000000 fffff880`06851081 gt72ubus.sys gt72ubus.sys+c081 Option N.V. 1.0.0.5 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\081013-13228-01.dmp 4 15 7601 293.840 10.8.2013 16:48:00
080813-17472-01.dmp 8.8.2013 13:30:08
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED 0x1000007e ffffffff`c0000005 fffff880`08dd2081 fffff880`0a675388 fffff880`0a674be0 gt72ubus.sys gt72ubus.sys+99ad Option N.V. 1.0.0.5 x64 gt72ubus.sys+c081 C:\Windows\Minidump\080813-17472-01.dmp 4 15 7601 293.472 8.8.2013 13:30:56
080813-20685-01.dmp 8.8.2013 11:52:29
DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000d1 ffffffff`ffffffb8 00000000`00000002 00000000`00000001 fffff880`0936cd40 Gt51Ip.sys Gt51Ip.sys+19d40 NDIS driver Option N.V. 2.0.3.14 x64 ntoskrnl.exe+75c00 C:\Windows\Minidump\080813-20685-01.dmp 4 15 7601 293.784 8.8.2013 11:53:19