Reply 1 : G73 i7-720 OC
You can use a program called setFSB to change the bus speeds. It is not free, however. Requires a $5 donation.
Reply 2 : G73 i7-720 OC
I got the 820QM processor instead of 720 and have tried to acheive some results using SetFsb. In a way the application did what its supposed to, it raised the fsb/processor speed. However the performance in benchmarks and fps dropped just like it does when you enable twin turbo mode (twin turbo mode does the same as Setfsb if i understand it correctly). It pussels me and i havent yet found an answear to why you loose performance when it should be increasing. Perhaps its a cpu design thing, i dont know.....
Reply 3 : G73 i7-720 OC
Weird that. Sounds like another thing Asus has to find a solution to. A working turbo button.
Reply 4 : G73 i7-720 OC
The performance drop is due to how the multipliers work with intel turbo boost. At stock bclk of 133MHz on the 720qm, the overall clock speed it 13 (12 + 1 due to turbo boost) x 133MHz (1.729GHz)
With twin turbo, the bclk is raised to 142MHz if i remember correctly. Due to the higher fsb clock, turbo boost doesn't kick in so the overall clock speed is 12 x 142 (1.704MHz).
That is when all four cores are used of course.
In order to get an increase in performance, the fsb clock has to be increased enough and heat can become a problem if you overclock too much. Just take a look at the difference in CPU temperature when twin turbo is on.
The bottom line is, you have to use setfsb to gain an increase in CPU speed. I saw a thread somewhere in the asus forums dedicated to OC the i7 on a G73 where it was successfully overclocked.
With twin turbo, the bclk is raised to 142MHz if i remember correctly. Due to the higher fsb clock, turbo boost doesn't kick in so the overall clock speed is 12 x 142 (1.704MHz).
That is when all four cores are used of course.
In order to get an increase in performance, the fsb clock has to be increased enough and heat can become a problem if you overclock too much. Just take a look at the difference in CPU temperature when twin turbo is on.
The bottom line is, you have to use setfsb to gain an increase in CPU speed. I saw a thread somewhere in the asus forums dedicated to OC the i7 on a G73 where it was successfully overclocked.
Reply 5 : G73 i7-720 OC
wasn't this it?
its not on the g73 but it is about the i7-720qm
its not on the g73 but it is about the i7-720qm
Reply 6 : G73 i7-720 OC
Quote:
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Originally Posted by Xellon 
wasn't this it?
its not on the g73 but it is about the i7-720qm |
Reply 7 : G73 i7-720 OC
This was discussed in detail in the G73 Benchmark thread
Reply 8 : G73 i7-720 OC
You didnt OC it enough to see a performance increase 
.
You have to OC it more than what turbo boost does, since when youre OCing, the turbo boost doesnt kick in.
I have overclocked my i7-820qm to 2,2 ghz on all 4 cores, so the performance increase becomes noticable. Havent tried more yet and i dont feel like it since i have no real use in overclocking the CPU.
.You have to OC it more than what turbo boost does, since when youre OCing, the turbo boost doesnt kick in.
I have overclocked my i7-820qm to 2,2 ghz on all 4 cores, so the performance increase becomes noticable. Havent tried more yet and i dont feel like it since i have no real use in overclocking the CPU.
Reply 9 : G73 i7-720 OC
Quote:
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Originally Posted by HellCry
You didnt OC it enough to see a performance increase
.You have to OC it more than what turbo boost does, since when youre OCing, the turbo boost doesnt kick in. I have overclocked my i7-820qm to 2,2 ghz on all 4 cores, so the performance increase becomes noticable. Havent tried more yet and i dont feel like it since i have no real use in overclocking the CPU. |
Ah, and since you to have a 820qm, how much did you move the fsb slider in Setfsb? Did you do anything else in Setfsb to make it work or was it just the slider you worked with?
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