Why my AMD Sempron 2800+ works at half speed?

[Alextasy]

Does somebody know why a processor might work on half speed?
On my nForce 2 motherboard it have the multiplycator just 6x instead of 12x (166Mhz) meaning that is working at 1GHz instead of 2GHz.
Procesor details: AMD Sempron Thoroughbred Socket A Family 6 Generation 7 Model 8 256L2 2800+ (2000MHz).
The motherboard BIOS is already upgraded to last version to support it...but according to the manufacturer site there says that supports AMD Sempron 2200+/2800+ Model 10 and I have Model 8.
It might be this the cause and the processor to be unsuported?
P.S. In BIOS I don't have settings to change the Multiplycator.
Any help is apreciated... Thanks.

[D.8080]

Look in bios for FSB oprion, and see if it is correct.

Is your processor a mobile sempron?

No, model 8 is supported if 10 is, don't worry for that.

[Alextasy]

Of course is correct.
The processor originaly is 166MHz (333MHz DDR) [wich I use it] but It work on every settings (100,133,166 and even 200). [For example on 200 I got 6x 200 = 1200MHz (20% Overclocked)].
It can be a faulted processor?
Is there the posibility of reduced multiplier because of not enough power from the electrical suply?
Or can be this processor fake?
(In My Computer, CPU-Z, Everest etc it says It's AMD Sempron but not like I usualy seen on every other persons [who have AMD processors] writed exactly [AMD Athlon XP 2700+ for example]... and also I checked the code writrited on it and it's what is suposed to be).
The processor is a Desktop one.
P.S. I already have the last BIOS (1.0E) for this motherboard in case you wondering.
the motherboard is an ECS N2U400-A (V1.0) [Elitegroup Computer System]. There is also an (V1.0U) but there are no tehnical differences.
Thanks for reply.

[D.8080]

Have you checked for jumpers on the motherboard?

Some have jumpers to set the multiplier.

If you have a pic of the cpu maybe if you can, post it.

[Neon]

Please post a picture.

Sempron 2800+ was commonly faked.

[Guest]

This is what the manufacturer has responded to my problem:
"This mainboard can only support model 10 Sempron CPU,maybe it is the key point.please change the model 10 sempron 2800 to have a try.
If you want service BIOS,maybe you should contact the sales for help."
I'll put a picture a bit later.

[Alextasy]

[Neon_WA]

the text panel has been remarked

so under all those stickers, will be bridges that have been altered and not successfully I might add

[Alextasy]

Full Size Shot w/o Stickers

I have another processor ...an Duron at 1600MHz wich have the multiplier 12x (133MHz)... so I don't think the motherboard have some pins to set that.

[Neon_WA]

the L11 bridges look like they have been altered.

this one posted on the site looks like it has original bridge settings,
but I will check mine tomorrow and confirm the correct bridge settings & what your chip likely was before remarking

[Neon]

You have a mobile XP-M processor that has been remarked as a desktop Sempron. It is fake.

Look here:
http://fab51.com/cpu/guide/attention_xp-e.html

For all Athlon XP desktop, the L6 and L8 bridges should be closed (no laser pits), but your sample has open bridges.

[D.8080]

=scam
If you can, ask for a refund.
Start a fakes collection - not a joke, some here do it.
----

At first I thought it was some mobile cpu, x6 is usually that.
Thought it was remarked maybe, but not all this...

Pics are enlightening.

[Alextasy]

Thanks guys
Can I find exactly what model was before?
On these remarked processors what factors are mainly changed? [I mean for example the (default) FSB can be changed (faked)?]
I ask this because I can't find any mobile Athlon XP with 333FSB wich is the default of my remarked sempron processor and any processor type with just 6x multiplier... maybe it was originally 12x and like Neon_WA said it was unsuccessfully remarked.

L.E. Seems to be an Geode NX for sure.

[Neon]

It is possible to determine the original processor model. You will need to carefully examine the surface bridges for evidence of tampering. From your photo, I cannot clearly see the L1, L3, L5, L12 bridges because there is some dust or glue.

The surface bridges are arranged in functional groups. For example, the L12 group controls the FSB. Each group has several bridges, each of which is binary open or closed. At the factory, all of the bridges are initially closed, then the factory uses a laser to make small cuts that open some of the bridges, depending on the required configuration. Note these bridges do not directly control anything; they just "forward" the information to the system BIOS.

It is possible to change the processor brand ID, FSB, startup multiplier, max multiplier, voltage, and L2 cache from factory settings by altering the bridges. A closed bridge is opened by cutting with a small knife (or laser cutter, if available ). An open bridge is closed by filling the trace gap with conductive paint to restore continuity across the bridge. These are delicate surgeries, and usually evidence of alteration can be visibly distinguished from the factory settings.

Look here for details, including function of each bridge group, and tables of values for particular bridge settings.
http://fab51.com/cpu/barton/athlon-e23.html

Look here for an analysis that I wrote for a fake Sempron 2800+ that I received.
http://www.cpu-world.com/forum/viewtopic.php?t=13040