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changing RAM FSB ratio

post #1 of 6
Thread Starter 
I'm not a mad overclocker but I recently got a water cooling system to reduce noise, and now my core temp is running at ~23c I decided that I could afford to squeeze a little more juice out. Here are my specs (this is overclocked here, it's originally a 5200+ @ 2.6Ghz) :



The only trouble is, I hit a wall here at ~3Ghz. My best guess is that the ram can't handle being oc'ed that much - but I'm not even sure if my processor can handle speeds any higher than that. I would test it myself but for some strange reason the BIOS on my M/B doesn't have an option to change RAM:FSB ratio, meaning I'm pretty much stuck at this speed whatever the reason. Assuming it's not my CPU, can anyone recommend any overclocking apps which have an option to change the FSB ratio?
Frankenstien
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Athlon 64 X2 5200+ @ 3Ghz Geforce 7900GTX 512MB Corsair 2x1GB DDR2 800Mhz 1x400Gb (SATA), 1x80Gb (IDE) 
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Frankenstien
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post #2 of 6
RAM:FSB ratio is determined in the BIOS.

1:1 is most desirable as it means your CPU is "talking" to your RAM in the most efficient and speedy way possible.

Is your ratio 2:1 right now? If so, then you should set your RAM to run one notch slower in BIOS. There should be an option on the same page you have option for changing FSB.

OR

You could try to oc more, but as it's not possible for you right now...
The MBP
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The MBP
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post #3 of 6
I would highley suggest turning the hypertransport down to 4x (it was called LDT bus or something in my bios), that could be causing problems also.
SUPERPWN
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SUPERPWN
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post #4 of 6
Thread Starter 
Thanks for the suggestions, but I can't do either of them, my motherboard only has these options :

CPU Frequency
PCIE Clock
CPU Ratio
(the rest are voltage controls)

It's an AM2 (DDR2) board, so I don't know if the architecture is different or if it's just the motherboard model which is stopping me from changing the HT multiplier / RAM ratio, on every other MB I've used the options have been there. Is it possible that they're unlockable somehow? Or can I change them with a windows program?
Frankenstien
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CPUGraphicsRAMHard Drive
Athlon 64 X2 5200+ @ 3Ghz Geforce 7900GTX 512MB Corsair 2x1GB DDR2 800Mhz 1x400Gb (SATA), 1x80Gb (IDE) 
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Vista Ultimate x64 
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Frankenstien
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post #5 of 6
you can only change the ratio in the bios. my guess is it would be in the cpu ratio section
my ghetto system
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my ghetto system
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q6600 @ 2.4ghz asus p5n32-e sli EVGA 8800gts 320mb+EVGA 8800gt superclocked 512mb 4gb crucial ddr2 1066 
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western digital 160gb+400gb ASUS dvd/cd reader/writer xp and vista dualboot dell 18"+acer 22"+dell 15" 
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Logitech G15 PCP&C silencer 750 coolermaster stacker 830 Logitech G5 
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post #6 of 6
Gigabyte... "Ctrl&F1" for advanced options if I recall correctly.
The LDT, common to DFI and Abit, or the memorys multiplyer...
It may be displayed 5x, 4x, 3x, or 2x im most BIOS but some use 1000 for 5x, 800 for 4x etc...
That will reduce the "Displayed HTT" or on some softwares "HT" which defaults @ 1000. Most MBs do 1080 stable, some higher but being over 1000 does nothing for performance, exceding it excessively only adds to instability.

BTW, nice OC so far
A big WELCOME to OCN to you
    
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500G WD Black LiteOn CD/DVD R/W Win7 64 22'' ws Acer AL2223W 
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MS KU462 Natural SS DA750 MS 5 button 
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