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Twain · 08-10-2009, 07:35 PM

Hi there

Finally I got my HP 2140 HD running with higher clock frequencies 8) 8) .

As already figured out by other people in the Internet (many thanks here to Abo from SetFSB ) the built in clock generator is hardware locked not to allow software overclocking in default configuration.

I disected the netbook and prepared it for some measurements in the lab:

For configuration of modification rights the clock generator reads in the state at pin 4 during start-up of the netbook. As can be seen on following signal graph over subsequent time a high voltage level (clock modification not allowed) is applied to the pin till the pin begins to act as a PCI clock output with 33 MHz frequency:

I switched off the HP and measured the resistance being present on the pin 4 of clock generator versus GND and VDD. The resistance was completely given by the resistor in the red box on following picture pulling the pin softly to VDD (sitting on the bottom side of the PCA).

I desoldered the resistor and moved it to the green boxed location. After I started the machine and took the measurement again:

As you can see, the configuration level is low now (clock modification allowed) . Thus I put the stuff together and booted the netbook into Windows XP. I configured SetFSB to a reasonable level and performed a first Passmark 7 benchmarking. See the results:

I'm going to test out the potential on both my 2140 HD netbooks during the next days. So far the situation looks promising, with displayed overclocking setting the netbook play 1080p almost well.

Cheers from Switzerland
Twain

08-10-2009, 07:35 PM	#1 (permalink)
Twain Junior Member Join Date: Aug 2009 Posts: 7	Solved - overclocking the HP 2140 Hi there Finally I got my HP 2140 HD running with higher clock frequencies 8) 8) . As already figured out by other people in the Internet (many thanks here to Abo from SetFSB ) the built in clock generator is hardware locked not to allow software overclocking in default configuration. I disected the netbook and prepared it for some measurements in the lab: For configuration of modification rights the clock generator reads in the state at pin 4 during start-up of the netbook. As can be seen on following signal graph over subsequent time a high voltage level (clock modification not allowed) is applied to the pin till the pin begins to act as a PCI clock output with 33 MHz frequency: I switched off the HP and measured the resistance being present on the pin 4 of clock generator versus GND and VDD. The resistance was completely given by the resistor in the red box on following picture pulling the pin softly to VDD (sitting on the bottom side of the PCA). I desoldered the resistor and moved it to the green boxed location. After I started the machine and took the measurement again: As you can see, the configuration level is low now (clock modification allowed) . Thus I put the stuff together and booted the netbook into Windows XP. I configured SetFSB to a reasonable level and performed a first Passmark 7 benchmarking. See the results: I'm going to test out the potential on both my 2140 HD netbooks during the next days. So far the situation looks promising, with displayed overclocking setting the netbook play 1080p almost well. Cheers from Switzerland Twain