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Old 02-09-2006, 11:11 PM   #1
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Default Limits to Overclocking

Hey guys.

I am desperately trying to get my Opteron stable at 3 GHz, but it never wants to. I'm not concerned about temperatures but I cannot get it stable! And, I've read a lot about overclocking, so I have a pretty good idea of what I'm doing.

My question is: are there physical blocks to the processor's maximum overclockability? Where it is the reason why it cannot overclock? Or is it not the limitation, but the motherboard, RAM, etcetera is?

Also, another question. Is there any way possible that I can get a Dell motherboard and CPU to overclock? Is there another BIOS available with the options unlocked? Or will I have to buy a new motherboard to get these options...

Thanks!
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Old 02-10-2006, 12:13 AM   #2
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Default Re: Limits to Overclocking

I think it's the BIOS limiting yo9ur overclock. Trying flashing it then upgrading to the new version. Plus, it's more then likly not your RAM or CPU, as the RAM and CPU both get overclocked when raising the FSB. So, maybe it's the FSB and its ability to not process or send inforamtion that fast?
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Old 02-10-2006, 02:16 AM   #3
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Default Re: Limits to Overclocking

it could be the ram. Since as leetdude already said when u raise the FSB u oc the ram, and when u oc the ram it can get unstable. And what geil ram are u using? But try setting the ram on a divider and see what happens.
I'm guessing it's not ur psu since it should be enough.

And if the ram divider doesn't help then just raise the voltage.
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Old 02-10-2006, 02:16 AM   #4
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Default Re: Limits to Overclocking

If you run 3dmark and click on details that tells you about your computer. It will tell you the limit your CPU can go to.
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Old 02-10-2006, 02:20 AM   #5
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Default Re: Limits to Overclocking

oh and about the dell.
If u can find a modified bios (99% chance that they won't be made by dell) which enables oc'ing then u should be able to oc fine. But it could be quite hard to find something like that.

But as far as I know that the only way u can oc a dell. And getting a new mobo should make oc'ing possible, unless the new mobo also has a locked bios.
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Old 02-10-2006, 03:20 AM   #6
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Default Re: Limits to Overclocking

you will need to run your RAM on a divider. AFAIK, Geil RAM isnt good for ocing unless you have the UTT-BH or TCCD varient. It could also be your psu. Try bumping up the voltage to 1.6V.
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Old 02-10-2006, 08:07 AM   #7
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Default Re: Limits to Overclocking

Okay, I already am running a RAM divider when trying to overclock. When I'm trying to hit the 3 GHz mark I usually set it on 266 MHz (as opposed to the normal 400 MHz, because this is just the way my BIOS is set up) and usually I have it on 333 MHz. When set on this, I have HT frequency down to 4x, my RAM runs at 200 MHz, and my CPU runs at 255 MHz (FSB). The multiplier on the Opteron 148 is 11x. I've got it running at 1.425 volts. However, when I try to get it past that mark, really, I get crashes and everything, even at around 1.525 volts and such! Since my RAM frequency is actually going down (when I switch to 266 MHz, when I boot it while at 3 GHz it usually reads about 177 MHz on CPU-Z) I don't bother to change the voltage. But, whenever I run AquaMark3, Prime95, or 3DMark05, it always will crash in the first minute or so. I can't really figure it out. I just don't think it is my RAM since it isn't being stressed at all, and I don't see how it is my CPU because I've upped the voltage a whole tenth of a volt (my BIOS only allows voltages to 1.55 for the CPU). Could it be my motherboard? According to CPU-Z, my power supply fluctuates on the high end of these voltage settings...

And where could I go about trying to find a modified BIOS?
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Old 02-10-2006, 11:46 AM   #8
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Default Re: Limits to Overclocking

Your going to need to up the voltages to make it stable...Simple as that. And if your temps go through the roof, then you need better cooling.

Not everyday that you can get an athlon up to 3ghz on stock cooling
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Old 02-10-2006, 04:57 PM   #9
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Default Re: Limits to Overclocking

Quote:
Originally Posted by 99nasha
Your going to need to up the voltages to make it stable...Simple as that. And if your temps go through the roof, then you need better cooling.

Not everyday that you can get an athlon up to 3ghz on stock cooling
he has an opteron
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Old 02-10-2006, 05:58 PM   #10
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Default Re: Limits to Overclocking

Flashing the bios is risky business. You muck that up and this whole excrise is going to be a mute point. Unless there is a real and I mean real problem with your computer that has been corrected by an updated bios, then you might want to follow my advise>>>
If it ain't broke, don't fix it.
You will not find radical bios updates that will open the overclocking for most systems. You muck this up and you'll have an interesting center peice for your coffee table.
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Old 02-10-2006, 06:49 PM   #11
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Default Re: Limits to Overclocking

Ah, thanks Setishock, I appreciate the advice (seriously, I'm not joking). I think I'll just keep it at stock speeds and just mess around with it, without overclocking, or anything.

I'll see what I can do, about overclocking. Thanks for the input!
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Old 02-11-2006, 01:53 AM   #12
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Default Re: Limits to Overclocking

Lower the HTT multi to 3x. That way you keep your HTT under 1000mhz which is ideal. Then raise the voltage to 1.5V. If thats not stable, bump up the voltage. What kind of cooling are you using? You better not be using a stock heatsink, UNLESS it is the one with the heatpipes.
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Old 02-11-2006, 01:46 PM   #13
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Default Re: Limits to Overclocking

Bwahahaha, stock cooling. My temperatures right now are fine, though. And, of course, I'll have a very, very close eye on them. I'm going to get a better cooler IF I can find a way to overclock more so that it won't be a waste of money.
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Old 02-11-2006, 06:49 PM   #14
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Default Re: Limits to Overclocking

Heat might also limit your overclockablilty too. You never know if you dont try.
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Old 02-11-2006, 11:23 PM   #15
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Default Re: Limits to Overclocking

Okay, I have a few more questions. I need to know the "conversions" of these things. Normally, my FSB of my CPU is set at 200 MHz. My RAM is set at 400 MHz. Now, I have my RAM set at 333 MHz and my CPU at 255 MHz. The RAM runs at 200 MHz according to CPU-Z in both of these situations. Now, I have my HTT at 4x, and I have no idea what it runs at. Say I'm going to change my RAM to 266 MHz (in BIOS). What FSB of CPU would I need to make that equal 200 MHz in CPU-Z? What HTT should I use? 3x? I'm guessing I can leave the timings alone.
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Old 02-12-2006, 12:07 AM   #16
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Default Re: Limits to Overclocking

First off, list your stock timings on that RAM. Run on a 166 divider. Change HTT muliplier to 3x. That will keep you good up to 333mhz on the FSB. 333x3=999, which is under 1000mhz. Keep your HTT at or under 1000. A little bit over is okay too.
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Old 02-12-2006, 12:27 AM   #17
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Default Re: Limits to Overclocking

Sorry but your better off not trying to overclock a oem system by dell, gateway, HP or whomever you got one from. Most companies lock out thier bios settings so you can't overclock. If you really want to overclock, get upto speed with PC building and build your dream PC. Then you'll truly have what you wanted and paid for. Also finding a new bios setup for your dell, may be very hard to find. Plus you may run into even more problems with a third party bios. I would love to oc my laptop, just because i know i could get more out of it. But of course gateway locked out the bios, and its just no worth trying to fix something thats not broken. Like someone else said, everything your doing is right, but raise the volts and it should become more stable. good luck and have fun.

later,
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Old 02-12-2006, 01:25 AM   #18
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Default Re: Limits to Overclocking

Haha, I'm quite familiar with building PC's... Look at mine in the signature!

Thanks Ownage, the timings are 2.5-3-3-6 I believe. I'm not sure, right now I'm on the closet computer so I can't check anything. The weird thing is, that in the BIOS, the RAM runs (default) at 400 MHz! I'm a little confused on how RAM speed is multiplied... Also, what's a 166 divider? Do you mean reducing the MHz of the RAM by that much? That'd be 233 MHz, though, not 266, which is what I had. Now, I'm running 333 MHz.
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Old 02-12-2006, 01:28 AM   #19
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Default Re: Limits to Overclocking

Quote:
Originally Posted by torment1979
Sorry but your better off not trying to overclock a oem system by dell, gateway, HP or whomever you got one from. Most companies lock out thier bios settings so you can't overclock. If you really want to overclock, get upto speed with PC building and build your dream PC. Then you'll truly have what you wanted and paid for. Also finding a new bios setup for your dell, may be very hard to find. Plus you may run into even more problems with a third party bios. I would love to oc my laptop, just because i know i could get more out of it. But of course gateway locked out the bios, and its just no worth trying to fix something thats not broken. Like someone else said, everything your doing is right, but raise the volts and it should become more stable. good luck and have fun.

later,
bill
he does have his own "dream machine"
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Old 02-12-2006, 01:29 AM   #20
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Default Re: Limits to Overclocking

okay, so RAM is DDR (double data rate) PC3200 runs at a 400mhz effective. (200mhz x 2 becuase of the double data rate) choose the divider that says 166mhz so it puts your RAM on a divider. 166 should be good. Or run your RAM on the lowest divider there is and try to clock your cpu as high as it will go. Now that will tell you how high your Opteron's memory controller will go.
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