oinkypig

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Dec 18, 2005
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ok i got a big typhoon and now have started to overclock my AMD Teledo 3800 x2. the highest setting i am able to get o/cing with this board is about 2.25-2.35 Ghz, while my goal is to reach 2.6-2.7. anything over 2.35 my pc will freeze up and i have to restart. or if i o/c too much i get the blue screen upon loadup, or when i logon to xp my core speed reverts back to 1.8Ghz for some odd reason. i am trying to equal everything out right, because as the o/c the cpu everything is o/c also.

1. ive lowered ram from 133 to 100 Mhz
2. ive lowered htt from 5x(1000) to 4x(800)
3. highest core voltage option is 1.4V which sux
4. FSB = 225
5. CPU multiplier at 10x

now to reach my goal what should i do? lower cpu multi, raise cpu speed?
right now the settings are:
ht link= 898 Mhz, Fsb =224.6, core speed = 2246.1, Memory 112.54Mhz
 

lashton

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Mar 5, 2006
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ok i got a big typhoon and now have started to overclock my AMD Teledo 3800 x2. the highest setting i am able to get o/cing with this board is about 2.25-2.35 Ghz, while my goal is to reach 2.6-2.7. anything over 2.35 my pc will freeze up and i have to restart. or if i o/c too much i get the blue screen upon loadup, or when i logon to xp my core speed reverts back to 1.8Ghz for some odd reason. i am trying to equal everything out right, because as the o/c the cpu everything is o/c also.

1. ive lowered ram from 133 to 100 Mhz
2. ive lowered htt from 5x(1000) to 4x(800)
3. highest core voltage option is 1.4V which sux
4. FSB = 225
5. CPU multiplier at 10x

now to reach my goal what should i do? lower cpu multi, raise cpu speed?
right now the settings are:
ht link= 898 Mhz, Fsb =224.6, core speed = 2246.1, Memory 112.54Mhz

Okay hares an idea, lower your HTT to 3X, raise you FSB, because you motherboard can handle more heat so put more stress on it than you CPU, and lower you CPU to maybe 8X, you should really take the course of 280 X 8 rather than 225 X 10 if you get what I mean?
I don’t really think lowering your RAM is the answer unless its really dodgy RAM, also what kind or RAM and MOBO are you using?
 

ragemonkey

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Jun 26, 2006
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unless the core itself is limiting you... you should be able to get 2.5 with relative ease with the 3800. With a Zalman I can get 2.5 Ghz 100% stable with mine using Corair Value Select, and 2.6 only works if I put better memory in. Instead, I got myself a 4800 when it was on sale and have it going at 2.7

In terms of stability, most of the time the issue will be your memory and buses (pci, pcie, and sata) long before the cpu. Lock these settings if your mobo supports it... or set them to "Down Spread"

The key to Ocing and getting maximum performance is to get your CPU clock speed as high as possible, while also minding to keep the speed of your other components (memory, pci, pcie) at or very near close to their default speeds. For example, running 2.3Ghz on this chip is pointless if you are running your memory at DDR333 speeds (final speed, after the timing algorithm: aka- 2:3, 5:4, or 1:1) You will actually notice a substancial performance deficit.

I do have a question though. Which core and socket are you running again exactly? The last time I checked the X2 3800+ in 939 was a Manchester core, and the AM2 was a Windsor. The reason I ask is because the 939 3800+s seem to OC much better than the AM2 varieties.

With a 939 3800+, you should be able to do the following:
=====================================

FSB at 250, Vcore at 1.3875v or 1.4000v

Memory set at 166 (ddr333) using a 5:4 timing ratio

Hypertransport at 4x

PCIe bus locked at 100mhz

PCI bus locked at 33.3mhz

SATA spread spectrum set to Down Spread

Cool and Quiet Disabled

======================

The results should be:

2.50 Ghz Clock Speed
415Mhz DDR memory (207.5 actual speed)
HTT Speed is 1000Mhz

At a FSB of 240, you get...

2.4 Ghz clock speed
398Mhz DDR (199 actual)
HTT Speed is 960Mhz
=================

The idea is... do the math beforehand using Calc and determine what your "sweet spots" are. With a 3800+ you should not need to adjust your multiplier at all. Also, if you do adjust your memory timings.... set your FSB at a minimum of 240 to keep your memory as close to DDR400 as possilbe as not to hinder performance.

Try these settings... if it still hangs at 250 then take the FSB back to 240. At 240 the actual memory will end up as 199 (398 DDR) which will be 100% stable... as long as your CPU handles the heat and speed.

GL to ya.
 

3Ball

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I have been testing my system at 2.6ghz for the past 2 days and have been lowering the vCore by 1 stage down in the bios every 2 hours. I started at 1.5v and have moved down to 1.4v so far. I am runnin prime right now at 1.3875v and its starting to behave alittle weird but no problems yet, but I would assume that you should be able to get higher unless it is a motherboard limitation since I have gotten as high as I have!

Best,

3Ball
 

oinkypig

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Dec 18, 2005
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i go the Manchester 939 3800 x2. ill try your directions asap.(probably tomorrow) i also have ddr333 ram, and by default its running at 133 for some odd reason.?.? so i lower the ram to 100Mhz