Q8300 OC problem ?

[CubiX]

Hello guys i recently wanted to overclock an old Q8300 i had sitting in the shelf and came up with a problem?! or feature ?! xS

 

Soo i started overclocking  my Q8300 until i hit a bottleneck and that was not the vcore or the ram . I couldnt reach the fsb clock at 400 with multiplier 7.5 (which unfortunately is the maximum multiplier in the Q8300 :'( ) unless i raised the pcie frequency from 100Mhz to 110Mhz !!

I tried to go past the 400Mhz on the fsb while raising the pcie freq and vcore the same time i made it to 3.5Ghz but then realised that i had raised so much the pcie freq that the motherboard wouldn't recognise any sata device .. and now here comes my question :

Is it supposed to be like that on the 775 socket architecture or does the motherboard have a bug ? also since the pcie lanes arent anything close to the sata ports how does it come that all sata devices are not found ? (btw 2.5inch drives ssd's and hdd's were only recognised up to 115pcie Mhz clock and then on 120 all sata devices vanished)

Specs :

Cpu : Core 2 Quad  Q8300

Mobo :Asus P5E DO-VM

Ram : Corsair 2x2GB dominator 800Mhz 

Gpu : Asus gtx285 

drives : 3x 150gb 3.5inch wd - 1x ssd sandisk 64gB - 1x toshiba hdd 2.5inch

 

Thanks in advance for the help  

 

Btw it runs perfectly at 3Ghz  

-CubiX

[dragoon20005]

@harrynowl

 

you might be limited to the Q35 chipset limitations

 

it only supports up to 1333MHz FSB

[harrynowl]

That'd be your board, most boards support independent ratios for the PCI and FSB clocks. Have a look around and see if you can find something along the lines of "Unlink PCI clock".

[CubiX]

@harrynowl

 

you might be limited to the Q35 chipset limitations

 

it only supports up to 1333MHz FSB

the Q8300 Has that limitation it is the only downside of the cpu, while on the 3.4Ghz max where i could oc while having my ssd up to bench it and max temps were like 62 degrees max