Question Q6600 vs Q8400

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Probably just incompatible.

Was worth a try. OEMs like to lock down boards like this commonly.

I just bid on a q8400 on ebay. Ill try it in my dell lga775 g43 board.
I don't think so. His friend has an identical motherboard that the q8400 came from, so there's no reason it shouldn't work. Plus this series of Dell could take any lga775.

Also, I would research if another processor would work in your board before you just get a processor. Luckily due to the age of these systems just searching for 'MODEL_NO cpu upgrade' will bring you tons of good resources with answers.
 
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JackFive

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I don't think so. His friend has an identical motherboard that the q8400 came from, so there's no reason it shouldn't work. Plus this series of Dell could take any lga775.

Also, I would research if another processor would work in your board before you just get a processor. Luckily due to the age of these systems just searching for 'MODEL_NO cpu upgrade' will bring you tons of good resources with answers.
Yes actually i figured out what was missing in my mobo was chipset required for Q8400 and mine is q35 and the PLL code in his pc is no where to be found on the internet spells something like K8124T23 not sure.
But he booted his pc without any problems,
Now i don't know why this thing isnt booting up in mine.
 

JackFive

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If you've got the q6600 up to 3ghz using setfsb, I think you're definitely exceeding the performance of the q8400.
What if that Q8400 would have been Overclocked as well?
And about those instructions to run newer games are still missing.Any way to get rid of them ?
Atleast Farcry 5?
 

Zizo007

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I don't think the q8400 could oc like the q6600.
Why not? Its new with 45nm tech which produces much less heat.
SetFSB was a very nice tool but unfortunately it was discontinued, I used it to OC my Q9550 HP Workstation from 2.8 to 3.4Ghz using stock voltage, it also overclocked the RAM.

I am not buying property PCs anymore since my budget now allows me to buy new quality components.
 

Zizo007

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Very few CPUs benefit much from the tape mod. It can even destroy clocks of some.

So you may never be able to oc the 8400 in that board.
He can OC with SetFSB tool. I got a 600Mhz overclock from a Q9550 HP workstation using it. It overclocks the bus so CPU and RAM are overclocked together.

It won't overclock very much because it doesn't give voltage control and is dependent on the RAM.
 
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Zizo007

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How does one do that? I have several Dells I would love to try this on.
Hers a list of compatible PLLs:
https://www.overclock.net/forum/268-dry-ice-liquid-nitrogen/601904-setfsb-clock-generator-list-compilation.html#/topics/601904

Sometimes if its not in the list you can try closely related numbers until it overclocks, you will be able to move the slider if your selection works, if not, keep trying other selections. Monitor CPU RAM speed in CPUZ. Monitor temps using SpeedFan.
 
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