DDR frequency failure

[litdestroyer]

my motherboard detects the Duron with internal and SDRAM frequencies as 100 and 100 MHz respectevely, and if I set the SDRAM to 133 MHz the systems hangs after a while. I have tried with 2 different motherboards and CPUs (both ECS K7S5A and Duron 1200 MHz)and with 2 different modules of DDR SDRAM : 128 MB PC2100 SpecTek and 256 MB PC2600 Geil.shouldn't it work at 133 (266) MHz?


ECS K7S5A Lan Sound integrated
256 MB PC2700
128 MB PC2100
Duron 1200MHz
PixelView GeForce4 Ti 4200 128MB VIVO
Maxtor 40GB 7200rpm
Levicom 300W PSU

 

[slvr_phoenix]

I wouldn't think that it should be this, but it could be a power supply problem.

Or it could be an overheating problem. How is your case's air flow around the RAM?

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[SidVicious]

Changing the FSB from 100MHz to 133MHz WILL result in overclocking your CPU to 1600MHz that's why your system is not booting. If you really want to run your CPU on a 133MHz or 166MHz FSB, you'll need to unlock your Duron.

I don't know if your board BIOS will support user defined multipliers after the chip is unlocked but it's so easy to do that it deserve to give it a try.

Unlocking Duron Morgan CPUs is really easy, just grab a mechanical pencil and connect the L1 bridges ( L1 ::::. ) so they look like this ( L1 ||||. ) if you miss a bridge, just grab an eraser and repeat the process.

The point of all this is to make maximum use of your memory bandwidth. Even if the Duron Morgan CPU is not officially able to run on a 133MHz or 166MHz, belive me, they can, I'm running my Duron Morgan AHHAA 1GHz @ 166 x 6 and I built a similar system for a friend with a AHLCA 1.2GHz @ 166 x 7 ( 1167MHz ) Both systems were based on the Asus A7V333-RAID motherboard.

If you don't want to touch your CPU, you can try to change the FSB/memory ratio from 1/1 ( synchronous ) to something like 3/4 ( 100/133 ) or 3/5 ( 100/166 ) but you won't get much higher performances from your chip because the lower FSB will become a bottleneck. It's also important to pay attention to PCI and AGP so they stay close to their respective defaults of 33.3MHz and 66.6MHz because some PCI and AGP cards can fail under higher or lower speeds than that.

Anyway, I wish you luck and a lot of fun if you decide to tweak your system...



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