There is no need to match the I7-740QM processor, the motherboard can not play the performance of the CPU, from the practical point of view, with the Intel Core i7 640M effect is best.
Intel Core i7 640M Configuration parameters:
Applicable type: notebook;
CPU series: Core i7 mobile version;
CPU frequency: 2.8GHz;
Max frequency: 3.46GHz;
Slot type: BGA1288, PGA988;
Level 2 cache: 2*256KB;
Number of cores: dual cores;
Number of threads: four.