Maximum safe vcore voltage for AMD X2 3800+

I figured out how to set the memory divider to CPU/6 (by choosing
DDR2-667 in DRAM config).

Now, how should I set the CPU voltage to overclock the CPU to 2400Mhz?

Using default voltage and FSB of just 225Mhz, the board beeped with 1
long 2 short error during start-up.

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On Mon, 18 Dec 2006 20:15:24 +0800, Man-wai Chang wrote:


I figured out how to set the memory divider to CPU/6 (by choosing
DDR2-667 in DRAM config).

Now, how should I set the CPU voltage to overclock the CPU to 2400Mhz?

Using default voltage and FSB of just 225Mhz, the board beeped with 1
long 2 short error during start-up.

Did you also lower the default HT speed form 5x to 4x? On my X2 3800+ I
didn't have to raise vcore to go to 233MHz. Was in a hurry and didn't try
any higher. I would think most would work at .10v or less over default at
speeds up to about 2600MHz. Just have to try and see, I would exceed 1.50v
in any case.

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Did you also lower the default HT speed form 5x to 4x?

Why would reduced HT speed help overclocking? 5*200 is the same as
4*250, isn't it?

On my X2 3800+ I
didn't have to raise vcore to go to 233MHz. Was in a hurry and didn't try
any higher. I would think most would work at .10v or less over default at
speeds up to about 2600MHz. Just have to try and see, I would exceed 1.50v
in any case.

CPUZ reports the CPU using a default voltage of 1.088V. 1.4V seems to be
very high. Is it safe at all? I am using the stock heatsink.

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"Man-wai Chang" wrote in message

Did you also lower the default HT speed form 5x to 4x?

Why would reduced HT speed help overclocking? 5*200 is the same as
4*250, isn't it?

It is. What Wes is worried about is 5*250 = 1250 = Bad. Use the HT
multiplier to keep the HT under 1050 or so. It's got heaps of spare
bandwidth so x4 isn't a problem.

On my X2 3800+ I
didn't have to raise vcore to go to 233MHz. Was in a hurry and
didn't try any higher. I would think most would work at .10v or less
over default at speeds up to about 2600MHz. Just have to try and
see, I would exceed 1.50v in any case.

CPUZ reports the CPU using a default voltage of 1.088V. 1.4V seems to
be very high. Is it safe at all? I am using the stock heatsink.

1.4v is the recommended maximum voltage for most if not all 939 X2s. I'm
not sure about the AM2 X2s. It may well be less.

On Tue, 19 Dec 2006 10:05:57 +0800, Man-wai Chang wrote:


Did you also lower the default HT speed form 5x to 4x?

Why would reduced HT speed help overclocking? 5*200 is the same as
4*250, isn't it?

On my X2 3800+ I
didn't have to raise vcore to go to 233MHz. Was in a hurry and didn't try
any higher. I would think most would work at .10v or less over default at
speeds up to about 2600MHz. Just have to try and see, I would exceed 1.50v
in any case.

CPUZ reports the CPU using a default voltage of 1.088V. 1.4V seems to be
very high. Is it safe at all? I am using the stock heatsink.

Doesn't mean anything. Mines reporting 1.10v right now since I'm
using CnQ and the speed is reduced to 1Ghz. AMD also uses diferent default
vcores on the same model cpu's. if you buy the low wattage model, it's
default will be lower than the higher wattage model even though they are
indentical cores. I have looked up max alowable vcore for this model but I
would assume it's about 1,70v although I would never go that high with it.
Now I had to pump 1.675v into my old hammer core 3000+ to get it from 2000
to 2330MHz.

You can find all the default voltages on amdcompare.com, and if you can
find the spec sheet for your core, it should give you the max allowable
voltage, which really means the max they recommend setting it to. Keeping
it within heat limits means more than voltage.


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You can find all the default voltages on amdcompare.com, and if you can
find the spec sheet for your core, it should give you the max allowable
voltage, which really means the max they recommend setting it to. Keeping
it within heat limits means more than voltage.

Should be this one:
http://www.amdcompare.com/us-en/desk...=ADD3800IAT5CU

There is no maximum voltage in the table...

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Website: http://www.itech.com.hk (IE only)
Tel: (852) 2325 3883 Fax: (852)2325 8288

You can find all the default voltages on amdcompare.com, and if you can
find the spec sheet for your core, it should give you the max allowable
voltage, which really means the max they recommend setting it to. Keeping
it within heat limits means more than voltage.

Should be this one:
http://www.amdcompare.com/us-en/desk...=ADD3800IAT5CU

There is no maximum voltage in the table...

--
iTech Consulting Co., Ltd.
Website: http://www.itech.com.hk (IE only)
Tel: (852) 2325 3883 Fax: (852)2325 8288

On Tue, 19 Dec 2006 15:15:58 +0800, Man-wai Chang wrote:

You can find all the default voltages on amdcompare.com, and if you can
find the spec sheet for your core, it should give you the max allowable
voltage, which really means the max they recommend setting it to. Keeping
it within heat limits means more than voltage.

Should be this one:
http://www.amdcompare.com/us-en/desk...=ADD3800IAT5CU

There is no maximum voltage in the table...

Correct, it just gives the default voltages. if you want to know the max,
you'll have to dig through the tech docs on amd.com.

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There is no maximum voltage in the table...
Correct, it just gives the default voltages. if you want to know the max,
you'll have to dig through the tech docs on amd.com.


Mind to offer some help..

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On Fri, 22 Dec 2006 21:39:32 +0800, Man-wai Chang wrote:

There is no maximum voltage in the table...
Correct, it just gives the default voltages. if you want to know the max,
you'll have to dig through the tech docs on amd.com.


Mind to offer some help..

With the stock cooler, about 1.50v. With the best air cooling you kind
find, probably around 1.70v.

http://www.amd.com/us-en/Processors/...9_7203,00.html

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