G73 Memory and lack of Bios!

Well, I am desperately looking for a way to lower my memory speed/dividers in order to gain a decent overclock. My i7 720qm seems to be a great overclocker, I am currently able to run it about 1950 mhz stable (2200 with turbo boost), however any higher and the memory starts causing bsods. Timings can be relaxed with cpu tweaker, but cas is unfortunately locked.

 

dividers? There's no fsb. You need to lower your memory speed by installing 800 or 1066 memory. You can't speed up your cpu bclk frequency and slow down your memory at the same time since the memory controller is built into the proc. Make sense?

 

Ok, I think I understand, although what I though I needed to do was have faster memory that is underclocked that way when I raise my blck it ends up overclocking the memory to the speed it is originally suppose to run at?

 

but that's the part you can't do. If you under clock the memory you are under clocking the cpu. You cannot touch the memory without touching the cpu and vice versa. Your best best is to get slower memory and just run it faster. Most 1066 memory can run at 1333 with no issues.

 

You also have the option of getting better memory also.

 

So getting 1600 mhz laptop memory would be out of the question then?

 

Well I guess that's one way of down-clocking it. Proc doesn't support 1600.

 

Hmm, so I guess it wouldn't run then, well thats too bad damn locked multipliers

 

No I'd guess it would run but without "external help" (setfsb) it should only be detected as 1333. I haven't tried it myself.

 

Hmm sounds interesting, that would at least get rid of the memory factor since over clocking it 350 mhz or so would put the memory at its stock speed.

 

Worth testing. I haven't tried it.

 

Well 1600 mhz hyper x kingston memory is only $133 for 4 gigs on newegg. People who have used it in similar alienware setups reports that it runs at 1333 mhz on non extreme processors, so basically I should be able to get a stable 2.0 ghz overclock across all 4 cores should everything go well. I have not decided whether I am going to mess with voltages or not but I would at least like to get the 720qm using the same power amount as a stock 920xm. With the current memory I have, overclocking the processor to 1940 mhz across all 4 cores (2100 with turbo boost on) shows only a few degree difference in temperature under load. It would be quite funny to beat a stock 920xm with the lowly 720qm and have it completely stable.