3800+ 2400MHz, wanna go faster: unlock Asus A8N-VM CSM...?

[mitch074]

I got my X2 3800+ to 2400 (instead of 10*200=2000), but my mobo doesn't allow the FSB to go over 240 MHz - and the multiplier can't be set by BIOS.

Does anyone have an idea how to either unlock multipliers, or how to push the FSB via software on this mobo?

I got this system to compile a 2.6.16.9 Linux kernel cleanly, so I would guess the overclock I've reached is somewhat stable... And I'd like to push it further, preferably without changing my mobo. I'm using Corsair RAM - not their best batch though.

 

[MadModMike]

I got my X2 3800+ to 2400 (instead of 10*200=2000), but my mobo doesn't allow the FSB to go over 240 MHz - and the multiplier can't be set by BIOS.

Does anyone have an idea how to either unlock multipliers, or how to push the FSB via software on this mobo?

I got this system to compile a 2.6.16.9 Linux kernel cleanly, so I would guess the overclock I've reached is somewhat stable... And I'd like to push it further, preferably without changing my mobo. I'm using Corsair RAM - not their best batch though.

You can't change multipliers of any AMD CPU unless it is an FX series or an XP. You said your BIOS won't let you up the FSB anymore, do you mean it's limit is 240MHz or it's just not stable passed 240MHz? If it's the latter, than up the voltage to the CPU in the BIOS, as well as set RAM to DDR360 or DDR333 if it isn't stable at high clock speeds. The only software overclocking that's universal is ClockGen, found at www.cpuid.org, though it won't keep the overclock on reboot so you have to reoverclock after every reboot.

~~Mad Mod Mike, fixin' the world 1 rig at a time

 

[mitch074]

I meant that my BIOS gives me a 200-240 MHz FSB range in 1 MHz steps. I can't make it go past 240 MHz FSB, eventhough the system is stable (as I said, I successfully compiled a Linux kernel using stock RAM and HT BIOS settings). Since I'm not ready to go hacking in the CMOS with an HEX editor, I'm looking for another solution.

I don't have voltage settings available either, but then I never had much success in overclocks when using increased voltages.

I'll try ClockGen, I haven't tried a generic overclocking tool since SoftFSB. Thanks!

 

[seanx]

I got my X2 3800+ to 2400 (instead of 10*200=2000), but my mobo doesn't allow the FSB to go over 240 MHz - and the multiplier can't be set by BIOS.

Does anyone have an idea how to either unlock multipliers, or how to push the FSB via software on this mobo?

I got this system to compile a 2.6.16.9 Linux kernel cleanly, so I would guess the overclock I've reached is somewhat stable... And I'd like to push it further, preferably without changing my mobo. I'm using Corsair RAM - not their best batch though.

You can't change multipliers of any AMD CPU unless it is an FX series or an XP.
~~Mad Mod Mike, fixin' the world 1 rig at a time


Strange on my x2 4200+ , I can change my default multiplier from 11
to 10, 9, 8 and prob to 1 lol .....
maybe mitch just needs a better motherbaord ?

 

[mitch074]

Actually, I'd gladly indulge in a new mobo, following these specs:
- Geforce 61x0+Nforce430
- TV or DVI output
- Micro ATX
- less than 80€
- 100% passive cooling

I've already fried a Gigabyte mobo that fit the bill better (and that could overclock better, too) - however I'd also like it to last a bit more than 2 months.

 

[desolationw]

I have the same motherboard and cpu as you. Last night i started overclocking it and got it to 2.2ghz with idle temps of 30-32, i don't think i will have any problems getting it to 2.4ghz. I've already lowered my ram speeds and HT link speed to match.

The only thing i don't know anything about is how the pci/pci-e lanes react to overclocking. do their speeds increase as well(which would be a bad thing) and have you found a way on this motherboard to lock them? I searched the bios a few times but the most obvious things i seem to miss sometimes.

Thanks

 

[mitch074]

they're always locked; increasing the CPU's bus speed doesn't affect the PCI clocks. You have to look out for HT overclock though, it's a BAD thing to get it past 1 GHz (default: 800 MHz, 200MHz x4 so if you leave it at default you're set)

Following MMM's advice, I reached 250 MHz with ClockGen, but then the system was less than stable (could be my RAM though).

I reverted back to native clock speed, as I don't need my CPU to run that fast most of the time.

 

[desolationw]

thanks very much, i used clockgen and found it was locked. i already know about keeping the HT at 1000mhz or below, but thanks for reminding me anyway

 

[Toester]

Actually, you really do not need to keep your htt at under 1000, as I've run mine at 1150 to 1200, with no issues at all! Very stable actually, but since I,ve started using "a64info" I can now run it lower-- you should give this proggy a whirl, as it helped me out a lot!! Can run my x2 3800 am2 at near 2.7ghz speeds now!

 

[mitch074]

some mobos take well to overclocked HT; mine did work with HT at 1.2 GHz, but I would get instability problems sometimes. Moreover it can wear down the motherboard and brings no performance increase.