Now stuck

tommchowat

tommchowat

tommchowat

Associate
Joined
11 Apr 2009
Posts
14
Hi guys,

First, my system:

E7400 2.8 @ 3.6GHz
4GB (2x2GB) PC8500 RAM
512MB 9800GTX+
Asus P5KPL-AM Motherboard
Xigmatek cooler + Noctua case fan

Basically I'm now stuck with this overclock. This motherboard's FSB is rated at 1600MHz but I just can't get it there. The bad thing about this board is that the FSB:RAM ratio cannot be changed, it's changed automatically depending on other settings. My current settings are this:

Multiplier: 10.5
Vcore: 1.392
RAM voltage: 2.1
Bus speed: 344MHz
Rated FSB: 1376MHz

I've attached pictures of cpuz and the BIOS. I cannot get the bus speed above 344. I've tried 345 but get a no POST, I've tried different combinations of bus speed and multiplier, different RAM speeds, but it always ends in a no POST. I'm dying to get this thing up to 4GHz, but I don't know the magic combination that might do it. Does anyone have any ideas?! I've attached pictures of all the info you might need but if you need any more then please ask!

Thanks.

cpuz.jpg


cpuz2.jpg


Photo0208.jpg


Photo0209.jpg


Photo0210.jpg


Photo0211.jpg
 
Last edited:
hummmm try with just one stick of ram, when i was doing mine sometimes when trying out speeds it wouldnt post but when i used only one stick it would be fine... then once saved and i put in the other sticks it would be fine :)
 
tommchowat said:
The bad thing about this board is that the FSB:RAM ratio cannot be changed
Click to expand...

Hey tommchowat,

you can change the Memory Dividers on *all* modern Intel® Core™2 motherboards. If you look in your screenshot that what the DRAM Frequency setting does! ;)

The thing that is throwing you is that the BIOS is displaying a fixed number for all the DRAM Frequencies which don't change as you adjust the FSB, on more overclock friendly boards the DRAM Frequency options change to reflect the user set FSB! :cool:

I've used a few similar ASUS boards based on the Intel® G31 Express Chipset and while they were solid performers they don't allow for anything more than a moderate overclock.

I'm not sure if it will help but if you change the DRAM Frequency to [667MHz[ that should result in the memory being set to run synchronously (1:1)

tommchowat.jpg


The only other thing I can think of is perhaps performing a BSEL Mod on your processor to fool the system BIOS into thinking it's a native 333MHz-FSB chip.

I know that chipset can run 400MHz FSB because I popped an E8400 into one and that overclocked fine to 3.6GHz using a 400MHz-FSB (9x400).
 
Thanks for that info. I just looked up a BSEL mod and apparently this board won't accept it. I tried upping all available voltages to the max possible, including the RAM at 2.2V, but the thing still won't accept anything above 344MHz, it's driving me absolutely insane.
 
tommchowat said:
I just looked up a BSEL mod and apparently this board won't accept it
Click to expand...
Really? . . . I was under the impression the BSEL mod was universal? If the board can run the actual FSB then the BSEL should be fine? :confused:

tommchowat said:
it's driving me absolutely insane.
Click to expand...

I see, I guess you been sitting there patiently fiddling with all the different BIOS options trying to make a breakthrough and I understand how testing of ones patience this stuff can be however if your really serious about your clocking then you should really be using a proven platform from which to base your testing.

Your motherboard is an excellent entry-level LGA775 platform which will accept any Intel® Core™2 processor but sadly it's not engineered for serious overclocking! :(

I think you got it in your head that because it officially supports a 400MHz-FSB you should be able to pop any chip in and crank it up to that level but its not gonna happen.

I've tried to overclock an E5200 in a similar board and and couldn't get it higher than 240MHz-FSB, this took the E5200 from 2.5GHz to 3GHz which I thought was a good result for a £35 motherboard. I swapped out the E5200 for an E8400 which ran rock solid using the 333MHz-FSB at stock and then 400MHz-FSB with a slight overclock taking the chip from 3.0GHz to 3.6GHz.

I can't give you a solid reason why this is but the same E5200 when used with a premium P5Q-E motherboard ran perfectly with a 350MHz-FSB and the E8400 flew up to 500MHz-FSB!

I guess its something to do with the actual components on the chipset and the way the BIOS has been tuned/tweaked internally that hamstrings it overclocking wise.

If you have tried setting the memory 1:1 and you think the BSEL mod looks too hard or won't work then you have two more options.

  • Be happy with what you have already
  • Buy a Premium motherboard and sell your old one
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom