Getting nowhere overclocking my x2 3800

El Jimben

El Jimben

El Jimben

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Currently, the setup in my rig is running at 10 x 214 = 2140 MHz, ram @ 1:1, HTT x4 (856 MHz). I've changed the divider to 166 so that the ram's running at 178.3MHz but when I up the FSB to 220 (so the ram would be at 191 MHz), my PC won't post and I don't know where I'm going wrong.

I'm still using the above at stock volts, as I'm sure the chip should be able to go some way before I need to increase the vcore. I did up the NB voltage to see if that made any difference but it still won't POST. Do I need to slacken my RAM timing (2-3-2-5) or something :confused:
 
I would give the chip a bit more voltage tbh..


EDIT : You need to lower The HTT Multiplier aswell :)
 
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Finally a person still using a S939! Stupid conroe :rolleyes:.

This should be a pretty useful reference whilst your clocking it. I'd like to get your results in there when you're done too.

Your CPU *should* be able to do more than that at stock volts, although some chips just don't clock as well as others. What RAM are you using - are you sure you've got it set to the right voltage (look at manufacturer's web site), maybe give it a bit of a boost. The RAM timings are fairly tight, but as it isn't even running at 200MHz, I doubt that's the problem (although you can always slacken it off to eliminate the RAM completely).

HT Multi of 4 is correct until you get to 2500MHz FSB.

What temps are you getting with all this?
 
The Pci-E frequency is locked@ 100MHz so that's not the problem. The RAM i'm using is G.SKill ZX DDR 400 2x 1GB Kit and the default timings are 2-3-2-5. As for slackening the timings, if it will do 214MHz at 1:1 with the default timings, then it should be able to 256 on 5/6 (DDR333) i.e. 256 divided by 6 = 42.6, 42.6 x 5 = 213MHz ram, 2560MHz CPU shouldn't it? My knowledge of dividers & timings isn't that great though.
 
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I have no idea why you're having problems with yours. When you say it doesnt POST, does it beep or anything else?

Either way, here's my settings, cant see why they wouldnt work for you too.

Ram Divider: DDR333 (166Mhz)
HT Multiplier: 4x
HT (FSB): 250mhz (Try it @ 240 first so you're not overclocking the ram)
Volts: Stock

EDIT: Looks like you're pretty much using those settings. :o

The onlly thing i can think of would be to add extra volts, but you shouldnt need them with such a low overclock. =/

Tried updating your BIOS?
 
hmmm

i think its a setting on the board bios you have probably just missed. even on stock volts your chip should run happy on 2.6ghz.

recheak all your settings, and rather then letting your ram run at standard settings try makeing your ram run at a lower speed, like 133 and let the cores over clock push it up.

my 3800 runs at 2.65ghz (165x10) at 1.6 volts, and rams on 216.7mhz
 
Ok, I got it into windows with FSB @ 220 by increasing the vcore to 1.4v but something's still screwed up, as I was getting error messages with SuperPI more or less as soon as it started. Wouldn't post with 225 FSB.

Am using the 0502 bios, could try updating to 0602 but I just don't see that this will help me. Maybe I could try slackening the RAM timings, how should I go about this?
 
d4ead said:
even on stock volts your chip should run happy on 2.6ghz
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Sorry dude but that's rubbish.

Try updating your BIOS, it's good to be working with the latest releases. Stick the VCore up to 1.45, slacken the RAM and see what you can do.
 
But if you look here, some people were getting 2.5 GHz http://forums.overclockers.co.uk/showthread.php?t=17578954 :( Anyway, the plot thickens! I flashed my mobo to the latest BIOS and it will now post @ 220 FSB, DDR333 at stock volts instead of 1.4v as before!? Same problem though, won't do 225 FSB no matter how many volts I give it. As above, how should I go about loosening the RAM timings, this mobo has tons of options.
 
Insanity said:
I did, but it wasnt stable... im 99% sure it was because of my ram though.
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I meant stable, whats the point in getting a overclock if its not stable... I could probably hit 3.1ghz quite easily but it won't be stable for anything less than going into windows
 
Vegeta said:
I meant stable, whats the point in getting a overclock if its not stable... I could probably hit 3.1ghz quite easily but it won't be stable for anything less than going into windows
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I guarantee i can get it stable, i just havent bothered. It'll only be a matter of tweaking the ram a bit.
 
ghgh said:
im getting 2.8 ghz with stock volts from a 3800.
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The discussion isn't over the possibility, it's was just the fact that very few X2 3800+s will reach much more than 2400MHz with stock volts. Some may do more, we don't need to see everyones, but many (mine, for example) won't - look at the table.

As above, C&C can seriously effect OCs. Are you running with AMD drivers or the Windows CPU driver set?
 
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