LightsInTheDark

Trying to get my 7750 to 3.4GHz.

stock is 200x13.5

I raise the FSB to 253, leave everything else on auto.
Should*** give me 3.4

Bios says it does, but when i save changes (F10), the screen just stays black until i shut it down.

upon restart, I get a message telling me boot/post failed or interuped.
I am then asked to enter setup and load the defaults - which I did, saved, but it made no difference.


If i try to just boot into windows, it just shows the regular 200x13.5, not my new value. -.-

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txtmstrjoe

LightsInTheDark, my first suspect would be a CMOS battery that's under-powered. If you've got a digital multimeter, measure the battery's voltage. It should be 3.0V or thereabouts. If it's lower than 2.8V, I would recommend replacing it with a new one.

I'd test the new battery as well, just to make sure you've got a good one.

Good luck.

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cyclometric

I don't know that processor, but if you're just setting it to 253 from stock, it might be too high an OC, or your volts might be too low, and I'm sure other problems could be blocking this as well.

Make small steps, and after each successful boot, run a quick Burnin test, like Prime95, even for 5 minutes, to do a quick basic check for stability. There are OC guides on here and elsewhere; the one for the Phenom processor at another forum helped me a lot and I'm sure has a lot of good information that would apply to your OC as well, check it out if you don't mind a lot of reading. :-) Sure helped me understand the process and steps to take, though, in OC'ing and in diagnosing problems.

Thread is here.

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CPU-Z Validation

txtmstrjoe

LightsInTheDark, actually cyclometric read your first post much better than I did. (I seem to be a bonehead in everything except work these days. ) I misread your post.

But cyclometric does give good advice here.

__________________

"What time is it? It's 9:39!" (The Official S939 Appreciation Club and Knowledgebase)My OCN Blog: Joe-Pinions (Have a Daily Nibble)

“Give a man a fish; you have fed him for a day. Teach a man to fish, and you have fed him for a lifetime.”—Lao Tzu (thanks to Blitz6804)

Today's "thlnk3r's thoughts": "You may fire when ready."

cyclometric

Thanks, txtmstrjoe! After reading your response, I thought maybe I was boneheaded myself, so I appreciate the

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CPU-Z Validation

LightsInTheDark

Well, then how does it boot under fine, normal conditions, and when OC'd to 3.2.

I DID find that my possible problem could be my RAM frequency.

DDR2 ram. both sticks (1gb ea) show in bios a speed of 566MHz.

In CPU-Z, it shows 200MHz, and 260MHz respectively.
I read that hinders my ocing.......could this be why?

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txtmstrjoe

LightsInTheDark, do you have a matched set of RAM? Mismatched RAM will cause all kinds of havoc whilst OCing.

@ cyclometric: Thank YOU for making me look again.

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"What time is it? It's 9:39!" (The Official S939 Appreciation Club and Knowledgebase)My OCN Blog: Joe-Pinions (Have a Daily Nibble)

“Give a man a fish; you have fed him for a day. Teach a man to fish, and you have fed him for a lifetime.”—Lao Tzu (thanks to Blitz6804)

Today's "thlnk3r's thoughts": "You may fire when ready."

cyclometric

LightsInTheDark, it is possible your RAM won't clock that high. People always say to check the manufacturer's specs, and I have tried to do that for my RAM (OCZ DDR2 800 2x2GB Platinum Vista Upgrade Edition) but I could never find the information on rated voltage, etc. though I'm sure it's somewhere -- but going from 400 (200x2 for the Dual Channel, assuming they are...?) to 566 is a pretty big jump. There might be a memory multiplier that you could use to actually reduce the effective speed, so that once it is doubled, it is something more like 480, or 512, etc. Because if the overclocking is done strictly by the FSB, and not the CPU multiplier, the RAM is going to be overclocked right along with the bus speed. I'm not familiar with ASUS Bios, either, but I'm sure in the Memory OC settings there must be something for multi, and the #s will show for example: 100, 133, 166, 200, etc.

Or maybe this is no longer an issue? PS--if it does turn out the RAM is going too fast, you can also try to tighten the timings, very carefully, and more easily, reducing the FSB setting and still reaching a high CPU overclock by using the CPU's multiplier (oops--I don't know if the 7750 has an unlocked multi, my bad!)

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Crooksy

I had a similar issue with an FSB hole. i couldn't set my FSB (QDR) to 1600, but 1601 or 1599 worked fine. Try changing it.

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Nenkitsune

it could just be your chip won't do 3.4ghz. my 7750 WOULD NOT boot at 3.4ghz without pumping an insane amount of voltage through it, and even then, it wasn't stable. I also found that it was more stable with multi bumps than it was with ht bumps

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