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X2 3800+ overclock, weird HTT result

post #1 of 4
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So, first off, let me say I'm a bit of a noob when it comes to overclocking.

That said, I seem to have made a stable overclock from a 2.0GHz base to 2.6GHz, but with a couple of weird settings.

OK, so base settings: HTT multiplier 5x, CPU clock ratio 10x, CPU clock 200MHz, DDR ratio 1/2 (running at 400 MHz), vCore at 1.35v

After looking around with the help of some of the excellent guides here, I tried the following overclock:
HTT multiplier 4x, CPU clock ratio 10x, CPU clock 250MHz, DDR ratio 1/1.66 (415MHz), and I bumped the vCore to 1.5v for the hell of it.

Seemed to me this would be reasonable, but it crashes before POST.

After playing around with all of these settings, and taking the advice of some guides to max out individual components seperately, I managed to work out a somewhat stable overclock, with the following settings:
HTT multiplier 2.5x, CPU clock ratio 10x, CPU clock 260MHz, DDR ratio 1/1.66 (430MHz), and a vCore of 1.5v


So, by my math, the HTT "bus?" speed is running at 650MHz, as opposed to the factory 1GHz. If I attempt to move the HTT multiplier any further than 2.5x, I go straight into POST failure. Any ideas why this would happen, or what performance issues this might cause (benchmarks show I've gotten decent improvement from factory settings)? Also, does anyone know of a good guide explaining how to optimize memory timings?
Kibbles and Bits
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Kibbles and Bits
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post #2 of 4
hello and welcome to OCN. please go up to your User CP and fill out your system specs. it will help the geeks here to help you better

i know nothing about AMD overclocks... i tried it once and it ended badly. i just wanted to stop by and say hi.
The C'roe
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The C'roe
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post #3 of 4
It could just be that the bios is picky and simply doesn't like that setting. That happens occassionally and all you can do is wait for an update. If someone else has the same board maybe they could tell you more, but that is my best guess. You can check and see if there is a bios update for the board, otherwise try dropping your memory clock again just to see if it changes anything when you up the HTT multi.

Changing the HTT multi isn't going to impact your performance much if at all so don't concern yourself with it too much. Here is a good overclocking/memory guide for you to check out.

Keep us updated and let us know what happens.
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post #4 of 4
I also have problems with the HT link, in bios I put x4 but in cpu-z it says that it is still x5.
So i tried in ntune and now cpu-z says that the HT link is x4
It must be some bios problem but I don´t care of it, ntune saved me
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monster
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