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ocing xp 1900+... help!

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  • CPUs
  • Windows XP
  • Overclocking
Last response: in Overclocking
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June 19, 2002 10:07:02 PM

Hey.. revently i've tried overclocking my xp 1900. I have an epox 8k3a+ mobo and 256 MB DDR Ram.
Currently, it is running at the normal spec of 133 clock and the cpu ratio is 12. I've tried leaving the ratio at 12 and i can't boot past 150 clock and 12 ratio. Windows loads at 147 clock but it freezes. I've tried upping the voltage on the cpu (from 1.750(norm) to 1.775 and to 1.8) and i've also tried upping the dimm voltage (2.50 (norm) to 2.6). The highets i've acheieved so far is 1800 MHz (a 200 Mhz jump). I tried running 3d Mark 2001 but it froze. Also i have water cooling my cpu and air cooling my whole system... Any advice?

Also, i know that it is better if you have a higher clock FSB. So should i put my ratio to like 11 or 10 and up the FSB more?

Time is the best teacher... unfortunatly, it kills all of its students.

More about : ocing 1900

June 19, 2002 10:14:59 PM

Yes, that will help out the RAM, therefore giving you a bit better performance overall.

What's the deal with lampshades, I mean it's a lamp, why would you want a shade? :smile:
June 20, 2002 12:14:08 AM

Quote:
Also i have water cooling my cpu and air cooling my whole system... Any advice?

Anyway, what temps do you have in your CPU/system?

Quote:
I have an epox 8k3a+ mobo and 256 MB DDR Ram

What RAM do you have? PC 2100, 2400 or 2700?




<b>(<font color=yellow>as good as it looks</font color=yellow>)</b>
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June 20, 2002 1:47:31 AM

yeah I have 1900+. Kick your mulitplier to 10 and fsb to 166. This gives you 1667mhz processor (almost 2000+ I think) and makes your fsb much faster. You might want to set your pci divider to 1/5 to keep it in spec speed. This way will give you the most performance. Don't mess with the voltage until you get it running stable then start slowly increasing the multiplier until you can't go any further stabily.
June 20, 2002 2:44:33 AM

I don't have any external temp. measuring devices, so i'm gonna go with my bios temps. Cpu and system Idle at around 30 degrees C and 32 under heavy load. I have pc 3000 Corsair ram.

Thanks everyone. Thank you for the tip rainchill.

Time is the best teacher... unfortunatly, it kills all of its students.
June 20, 2002 3:55:34 AM

With those temps you can raise the CPU voltage even more. Just be sure to keep it under 48ºC at heavy load.
About your memory: that PC 3000 should be able to do 166 MHz at CAS 222, so you don’t need to raise the voltage for it. Just keep the RAM volt at 2.5

As rainchill said, just drop the multiplier to 10 or 11 and set the FSB to 166/166.


<b>(<font color=yellow>as good as it looks</font color=yellow>)</b>
June 20, 2002 4:14:02 AM

yeah i've tried setting my fsb higher and i usually get a windows protection error. Sometimes it says it cannot run CONFIGMG... I'll keep trying.. also, how do i set my ram to? which setting is that?

Time is the best teacher... unfortunatly, it kills all of its students.
June 20, 2002 12:12:23 PM

In my bios I can set the ram timings under "advanced chipset features" Set it is manual and change the settings to 8-8-5-2-2-2-2. Those are considered to be the fastest settings. Make sure you have your latest bios version. Also it is very important if your running 166 fsb to change the divider to 1/5 like I stated earlier.

I suppose in an extreme case you could remove all your pci cards and leave in your vid card and see if you can get it to work that way. However, this is rather rash and wouldn't help you much in the end.

All things considered your rig should be working, if you still have problems keep on posting (no pun intended).

<P ID="edit"><FONT SIZE=-1><EM>Edited by rainchill on 06/20/02 08:13 AM.</EM></FONT></P>
June 21, 2002 1:26:01 AM

yeah i've tried messing with timings and that hasn't really improved performance (it degraded it in fact.) i'm going to try that again with what you said rain. but i can't find where i can manually set the divider to 1/5... I tried setting fsb to 166 but it won't POST. It is fine around 148 but that kinda sucks. What the hell is going on?

Time is the best teacher... unfortunatly, it kills all of its students.
June 21, 2002 1:50:16 AM

Sadly I don't have any direct experience with your motherboard so all I can tell you for now is to make sure you have your latest bios flash update. Also try looking around www.overclockers.com, I am sure they have an article dealing with your situation.

When you said that the timings didn't help do you mean you couldn't push the fsb as high or did you run a benchmark program to give you a performance number? If that is the case it is generally accepted that fsb 133 cas 2.0 is faster than fsb 166 cas 2.5.

I wish I could be of more help, if any thing else comes up just keep on posting.
June 21, 2002 2:14:31 AM

what i meant was that when i changed my settings, i would run 3dmark2001se and i would get a score around 9800.. then i reverted back to old settings and i got 9990. I don't know what 8-8-5-5-2-2-2-2 means exactly ( i know it's settings for the ram, but settings for what?). So i just changed all the numbers so that i had that many 5's, 8's, and 2's.
Here's the options i have for my dimm settings:
SDRAM Cycle length [2,2.5,3] set to 2
Bank interleave [2,4] set to 4
Precharge to active[2,3] set to 2
Active to precharge [5,6] set to 5
Active to cMD [2,3] set to 2
Dram Burst length [4,8] 4
Dram queue depth [levels 2,3,4] set to 2
write recovery [2,3] set to 2

i may have missed one or two, but i dunno.

Time is the best teacher... unfortunatly, it kills all of its students.
June 21, 2002 2:15:49 AM

Seeing as your motherboard is the KT333 chipset it should have a 1/5 divider but if it is MIA there is nothing that I can do for you.<P ID="edit"><FONT SIZE=-1><EM>Edited by rainchill on 06/20/02 10:20 PM.</EM></FONT></P>
June 21, 2002 4:42:53 AM

Quote:
I tried setting fsb to 166 but it won't POST

Did you unlock the multiplier in order to set it at 10X?
I mean, if you are using the default multiplier (12X) you would be trying to run the CPU at 166x12=1992 MHz!!! That’s XP2400!!! (almost impossible with watercooling)

To discard a problem with the motherboard:
1) unlock the CPU multiplier.
2) set the multiplier to 9.5X in order to get 1577 MHz (aprox XP1900)
3) if the system is able to boot up: the problem was that you were pushing too hard the CPU.
4) if the system still doesn’t boot up: come back to the forum.

About the divider: in general it should automatically change from 1/4 to 1/5 at 166 MHz.


<b>(<font color=yellow>as good as it looks</font color=yellow>)</b>
June 22, 2002 4:17:20 PM

yeah i set the multiplier to 10 and the fsb to 166 and it worked fine. I tried running my computer the next day and it wouldn't load windows... i set it back to normal settings and it worked just fine. Why did it work the night before and not now?

Time is the best teacher... unfortunatly, it kills all of its students.
June 23, 2002 12:57:59 AM

ok well this just got 10x weirder. I was messing around with the fsb and the multiplier today and found some extremely odd things. For one, i kept my fsb constant at 133 and would change the multiplier. It worked at 13x which i think means that i sucessfully unlocked my processor (right?). Also, i found out that when i set the multiplier to 9 or 9.5, it said the multiplier was set to 7 and 7.5. I tried setting the multiplier at 7 and 7.5 and it remained at 7 and 7.5. I could not POST at 10 and 10.5.

Currently i am running at 8.5x170. The machine actually POSTed on 11*170 but i would get a windows protection error. I'm going to run some test's now to see if it's stable at the fsb and see if i can up it a bit more. If anyone knows why i cant set my multiplier from 9 up to 10.5, please tell me because if it's busted or something i want to return it or call epox up. Maybe i should revert to an old bios?

Time is the best teacher... unfortunatly, it kills all of its students.
June 23, 2002 11:42:42 PM

one time i got mine up that high, but it didnt pass post. pretty sure it was a ram problem.

how do you shoot the devil in the back? what happens if you miss? -verbal
June 26, 2002 3:41:55 AM

anyone?

Time is the best teacher... unfortunatly, it kills all of its students.
June 28, 2002 12:50:39 AM

Ok guys and gals, I have the same mobo (Epox EP-8k3a+), but in my case I have a 1800+ (fully unlocked, running at 12.5x multi (which on this mobo is 13x) at 1.75v which is a 2000+), now my ram is Xtreme DDR (best on the market so they say) cas2 2-5-2 timings 512meg PC3000 samsung -6n chips all hand picked and tested. I've tried goin 166 fsb and I cannot, the only way it will post at 166 fsb is at 6x multi which is 992mhz... at any vcore (tried it at 2.5v at 6.5x and still no post)... any ideas? Oh, and I'm using an innovatek water cooler...

Also I'll post the settings I have fer my mobo so it'll give you guys without a 8k3a+ an idea of what I'm workin with.

Ram Settings:

DRAM Clock- 133, 166, SPD
DRAM Timing- Manual, SPD
cas- 2, 2.5, 3
Bank Interleave- 2, 4, disabled
Trp- 2t, 3t
Tras- 5t, 6t
Tred- 2t, 3t
DRAM Burst length- 4, 8
DRAM Queue Depth- 4, 2, 3 levels
DRAM Drive Strength- Auto, Manual
DRAM Command Rate- 1t, 2t
DCLKI/O- 0ns, .5ns, 1ns, auto
Fast R-W Turn around- enabled, disabled
Continuous DRAM Request- ", "

CPU settings:

Auto detect DIMM/PCI Clk- enabled, disabled
Spread Spectrum- ", "
Cpu Clock- 133-255
CPU Ratio- x6-x15 (x13 is x12.5, x14 is x4, and x15 is x5)
CPU Vcore Voltage- 1.5ish-2.50ish
DIMM Voltage- default-3.7
June 28, 2002 2:04:48 AM

you mean you can't do like 8.5 * 166? That's pretty weird..Maybe your voltage is too high because your lowering the processor speed? That is kinda weird...

Time is the best teacher... unfortunatly, it kills all of its students.
June 28, 2002 2:06:15 AM

nope, tried it at every possible voltage settin there is, still no luck
June 28, 2002 3:26:10 AM

have you gotten this june's bios from epox?



Time is the best teacher... unfortunatly, it kills all of its students.
June 28, 2002 5:09:38 AM

yep, everythin is the newest
June 28, 2002 5:04:38 PM

a little update on my end, I'm currently runnin 200fsb, yes you read right 200fsb no typo, multi 6.5 which is roughly a 1500+ talk about blazin speeds though, I still want to know why I cannot go past 6.5 on my multi when overclockin fsb
!