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NF4 capped at 246MHz?

post #1 of 13
Thread Starter 
Should an nForce 4 chip run any faster than 246MHz? I decided to try and find my external buses maximum frequency by lowering the memory speed and cpu speed with a divider and lower multiplier, and this is the highest frequency I can get the system to post. any higher and I get jarbled text, or no display at all, or the CMOS states it is putting the system in safe mode due to the frequencies.

The chipset is running at 30 degrees C. Surely it can go a bit higher than this?
    
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post #2 of 13
Quote:
Originally Posted by alk
Should an nForce 4 chip run any faster than 246MHz? I decided to try and find my external buses maximum frequency by lowering the memory speed and cpu speed with a divider and lower multiplier, and this is the highest frequency I can get the system to post. any higher and I get jarbled text, or no display at all, or the CMOS states it is putting the system in safe mode due to the frequencies.

The chipset is running at 30 degrees C. Surely it can go a bit higher than this?

I've heard that on the Intel based boards it caps at 333mhz...for the ASUS deluxe SLI's anyway.
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post #3 of 13
It shouldn't be limited. I have my FSB at 250 stable. I did some playing one day and saw speeds up to 265 but not very stable. I am limited by my CPU and voltage. You should be able to get higher!!
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post #4 of 13
Thread Starter 
Its a budget board (The one in my sig) though. Is there a way to increase the chipsets voltage?
    
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post #5 of 13
246 doesnt sound high enough? Have you got the PCI at 100 MHz.
Even the little Albatron Micro ATX NF4 I am using will do 340 stable.
Maybe some just won't pull their weight.
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post #6 of 13
Quote:
Originally Posted by alk
Should an nForce 4 chip run any faster than 246MHz? I decided to try and find my external buses maximum frequency by lowering the memory speed and cpu speed with a divider and lower multiplier, and this is the highest frequency I can get the system to post. any higher and I get jarbled text, or no display at all, or the CMOS states it is putting the system in safe mode due to the frequencies.

The chipset is running at 30 degrees C. Surely it can go a bit higher than this?
You very well could have hit the max fsb for that motherboard.

246MHz is low for all the nf4 chipsets I have used. Even my cheap o MSI K8N Neo4-FX will run 295mHz.

Have you increased the chipset voltage and CPU voltage ?
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post #7 of 13
NF4 is not the cause, as you may have found it's the MB desigh thats limiting it.
Perhaps some digging may find a modded BIOS to allow more adjustments.
Rather odd, most NF4 MBs that OC can do at least 270.
    
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post #8 of 13
It depends, I can get my Gigabyte GA-K8NXP-Sli board to 310Mhz. Maybe try a bit more voltage to the chipset ?
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post #9 of 13
Thread Starter 
Quote:
Originally Posted by The Duke
NF4 is not the cause, as you may have found it's the MB desigh thats limiting it.
Perhaps some digging may find a modded BIOS to allow more adjustments.
Rather odd, most NF4 MBs that OC can do at least 270.
I should have maybe made it clearer. I have the latest BIOS, and it allows adjustment of the FSB well beyond 246 MHz.

EDIT: how do I alter the chipset voltage?
    
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post #10 of 13
Unsure what it's called in yout BIOS, HTT, NB, LDT...
    
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