First kindly note my current machine specifications:
Lenovo ThinkCentre M58p Type 7484 Tower
Processor: Intel Core 2 Duo E4600 2.40GHz/2M/800
RAM: 2*2 GB (4GB) DDR3
Hard Drive: 320 GB Samsung
Chipset: Intel Q45/Q43 Express Chipset
Windows: Windows 7 Professional 32-bit SP1
Actually I have checked that link (
desktops and all in ones :: thinkcentre m series desktops :: thinkcentre m58p :: 7484 :: 7484wwa :: mjzym78 - Lenovo Support PK), I selected Processors in Commodity Type & it listed Intel Core 2 FRU: E8400 3.00GHz/6M/1333 as compatibility with my machine. Further more I installed the processor (Intel Core 2 FRU: E8400 3.00GHz/6M/1333) without changing any other component. When I powered up the machine it starts without pressing the power button (May be due to upgrade), It doesn't display anything & the fans (CPU Fan & Casing Fan) runs at full speed, upon this type malfunctioning, I turns off the machine & re-check any error in Processor/Heat Sink installation. Then I tried/turn on machine once again but it doesn't work as mentioned above. Then If I remove 1*2GB DDR3 RAM then it displays, but the fans still work at full speed.
If I stepped back to my original Processor (Intel Core 2 Duo E4600 2.40GHz/2M/800) with 2*2 GB (4GB) DDR3 it works fine again, but why Lenovo mentions that it can be up-gradable to Intel Core 2 FRU: E8400 3.00GHz/6M/1333.