hi,

according to Quickspec of 8540W it supports:

Standard FeaturesProcessorsIntel Quad-Core ProcessorsIntel Core i7-840QM Processor (1.86 GHz, 8 MB L3 cache)*  Up to 3.20 GHz with Intel Turbo Boost TechnologyIntel Core i7-820QM Processor (1.73 GHz, 8 MB L3 cache)*  Up to 3.06 GHz with Intel Turbo Boost TechnologyIntel Core i7-740QM Processor (1.73 GHz, 6 MB L3 cache)*  Up to 2.93 GHz with Intel Turbo Boost TechnologyIntel Core i7-720QM Processor (1.60 GHz, 6 MB L3 cache)*  Up to 2.8 GHz with Intel Turbo Boost TechnologyIntel Dual-Core ProcessorsIntel Core i7-640M Processor (2.80 GHz, 4 MB L3 cache)*  Up to 3.46 GHz with Intel Turbo Boost TechnologyIntel Core i7-620M Processor (2.66 GHz, 4 MB L3 cache)*  Up to 3.33 GHz with Intel Turbo Boost TechnologyIntel Core i5-580M Processor (2.66 GHz, 3 MB L3 cache)*  Up to 3.33 GHz with Intel Turbo Boost TechnologyIntel Core i5-560M Processor (2.66 GHz, 3 MB L3 cache)*  Up to 3.20 GHz with Intel Turbo Boost TechnologyIntel Core i5-540M Processor (2.53 GHz, 3 MB L3 cache)*  Up to 3.06 GHz with Intel Turbo Boost TechnologyIntel Core i5-520M Processor (2.4 GHz, 3 MB L3 cache)*  Up to 2.93 GHz with Intel Turbo Boost Technology* Intel's numbering is not a measurement of higher performance.NOTE: Processor speed denotes maximum performance mode; processors will run at lower speeds in battery optimization mode.

Urs is Intel® Core™ i7-2720QM Processor(6M Cache, 2.20 GHz) - so most common CPU is QM standard on 6MB cache. Theres no exact info in quick spec that this exact CPU will be working but to me seems it should be working. QM standard is compatible like in here:  Intel Core i7-720QM Processor (1.60 GHz, 6 MB L3 cache)*

anyways no 100% sure, i would be searching for exaxt one of those processors quickspec says - they simillar specyfication to Urs if u want i7.

regards