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I have a Thoroughbred 2400+ (133*15, currently running on 166*12). I would like to put it on 200*10 but the system wont boot up. I think the prob is in bios advanced/advanced chip features, cpu interface = optimal, it should be cpu interface = aggressive, but its grayed out and i dont know how to ungray it and set it to aggressive.

"cpu interface = optimal, it should be cpu interface = aggressive"
Wrong. Try this:
CPU Ext Freq = 200MHz
CPU Freq multi = 10.0x
System Performance = User Defined
CPU Interface = Optimal
Memory Freq = 100% *** (see note)
Memory Timing = User Defined
SDRAM Active Precharge Delay = 11
SDRAM RAS to CAS Delay = 3
SDRAM RAS Precharge Delay = 3
SDRAM CAS Latency = 2.5
FSB Spread Spectrum = disabled
AGP Spread Spectrum = disabled
CPU Vcore setting = Menu
CPU Vcore = 1.65v
Graphic Aperture Size = 128MB
AGP Freq = 67MHzNOTE: I'm assuming you have DDR400 (PC3200) RAM. If you have DDR333 (PC2700), set the Memory Freq to either 83% or "By SPD". However, if you use "By SPD", the SDRAM timings will be ghosted out.

nothing :(, again it wont boot up.
yes i have DDR400. I tried 200*11 and boots but in win i see artifacts after some time (since original clock is 2000mhz), so if this works i assume there should be way theat 200*10 works too.

it wont boot up again.
i tried 1.70v, 1.75v, 1.85v but nothing.
theat cpu interface still bugs me, is there any way to change it?

I had one of those boards for a couple of years & had no probs...those are basically the settings I used. You do NOT need the CPU setting at aggressive.
For the heck of it, try a lower CPU multi setting like 9.0x & see what happens.

9.5x and everything lower, and 11.0x - 15.0x works.
Maybe my Thoroughbred cant work in 200*10, but i saw people sad it works

I just did a bit of googling & it appears that others have had the same problem with the 10.0x & 10.5x multiplier setting. Which BIOS version are you running? A BIOS update (or possibly a downgrade) *may* fix the problem.

The first CPU I had with my A7N8X was the 2400+ and I seem to recall getting quite a good oc out of it, however, I never ever got anywhere near a 200MHz FSB. I started at 166 and increased it bit by bit, from memory, I think I maxed out around 180MHz. Additionally, if you're using DDR400, make sure you up your RAM voltage to at least 2.7v, I had all kinds of corruption when using the stock 2.6v @ 200MHz with my 2500+ (successor to the 2400+).
Completely useless? I can always be used as a bad example.
There are 10 types of people in the world. Those that understand binary, and those that don't.

Thoroughbred cores never supported 200FSB, and never supported anything above DDR333. Once past 166FSB and DDR333(166mhz) good luck.

i read
http://nforcershq.com/forum/interes...there says he also has this problems but not with bios 1003, so i was thinking putting this bios.
i have 1010 bios.

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