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MSI K9A2 Platinum, can't OC FSB very much.

post #1 of 8
Thread Starter 
Currently I can only get my FSB up to about 235 before I start getting errors within the first few minutes of a Prime95 blend test.

This just seems really low compared to the other reviews I've read about this board. It seems like most people can get the FSB up to 250-270. Even seen one guy's sig on a forum somewhere (might have been this one) claiming to have it at 297. Why is mine so low? Faulty board, or can hardwear limit it? I'm keeping my memory/CPU/HT multipliers lowered so that their speeds don't go above stock. I've increased the voltages of the NB to 1.325 (BIOS show them in RED, so I should probably lower it) and the HT link voltage to 1.350 and i still can't get it stable above 135. Even at 135 my quad CPU 's cores got errors in Prime95 at 1.5, 5, 5.5 and 7.5 hours so its not completely stable. (Though it passed 8+ hours of memtest86+ v2.01 with no errors)


Here's my specs

MSI K9A2 Platinum v1.4 BIOS
Sapphire TOXIC Radeon 3870 512Mb
2x(2Gb) Mushkin 8500 1066 DDR2 RAM 5-5-5-15-26-2T
Zalman ZM600-hp 600watt
2x Segate Barracuda ES.2 250g SATA in RAID 0
AMD Phenom X4 9850 currently at 2380Mhz at 1.336Volts
Windows XP 64-bit

EDIT: almost forgot. Speedfan shows my 12v at only 8.01v, but my BIOS show it at 12.94v. Which is right? I've tried Sandra Lite, Everest Home Edition, Everest Ultimate Edition Trial. HWmonitor, Motherboard Monitor, PC Wizard and who knows what else trying to find another program that i could compare to my BIOS and SpeedFan... but they either wouldn't work, Couldn't find where it showed the 12v reading (Sandra Lite's graph only went to about 5v... couldn't see where my 12v was at ) or it just wouldn't show me because I was only using the trial version. Soo any ideas? I could try to borrow my dads voltmeter next time i see him, but how do you test it manually? Stick it to the end of one of the 4-prong plugs?
Edited by Thunderbolt - 6/6/08 at 11:38pm
post #2 of 8
Thread Starter 
Anyone?
post #3 of 8
Welcome to OCN, Thunderbolt.... at what voltage and speed are you running your ram?
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post #4 of 8
Thread Starter 
796Mhz at 2.05 volts
post #5 of 8
What CPUs are being used on the board when they're running a higher FSB?.... are they using Phenoms?
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post #6 of 8
Thread Starter 
Tell you the truth I don't remember. does the CPU matter in the FSB.. even if you lower the multipliers to keep it below stock speed?
post #7 of 8
.... from what I've been reading, Phenoms aren't the greatest FSB OC'ers.
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post #8 of 8
I have hit that same ceiling with my 9850 on both the 780g board I RMAed and this 790fx. I'd say it's the chip.

On another note. I've got mine at 2.94 stable, and installing apps I can't even see the please wait bar, just DONE!. I'll be setting up my studio partition today, so I will soon be able to really put this thing to the test, when I have it running heaps of audio processors/effects, right off the midi tracks, which is why I bought the chip, for multi threaded madness without having to render a bunch of times just because the CPU is loaded up.

I have a feeling this thing can take some huge amounts of work.
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