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FSB Settings Athlon XP 2800

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Name: OVV
Date: January 29, 2006 at 04:26:28 Pacific
OS: XP Pro
CPU/Ram: Barton 2800/ 1024-4200
Comment:

I read on an Athlon forum that I can run my processor at 200fsb. It was by an Athlon technician. It was a while ago, but I remember that he had said that even though it was rated for 166, the processor could handle it with a stock fan. I know have gotten it up to 2.2ghz while set at 177 through the bios. I prefer to get another opinion before I set the jumpers and fry the poor thing.

Thanks in advance

OVV



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Response Number 1
Name: ben rogers
Date: January 29, 2006 at 06:26:31 Pacific
Reply:

It depends on what week the processor was made as ones after week 40 of 03 were superlocked by AMD. Ones before this date should have their multiplier unlocked.

I'm not sure about your board but to get 2200MHz and a 200FSB, set the multiplier to 11x. Most boards that allow this, control it in the BIOS nowadays.

If it does use jumpers to set the multiplier it won't fry anything almost for sure. If you set it wrong and you get no display just clear the CMOS and put it back to where it started.

Abit NF7-S 2.0
XP2500-M @ 11.5 x 204=2353MHz
Tt Volcano 7+
512MB DDR 1x2700, 1x3200
120GB Maxtor D9 8mb cache
GeForce4 Ti4200 @ 300/600


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Response Number 2
Name: jam
Date: January 29, 2006 at 06:28:44 Pacific
Reply:

There shouldn't be any jumpers to set...it's all done in the BIOS. The 2800+ is not good for overclocking. The problem is the high multiplier of 12.5x. If you take the CPU Freq up to 200MHz, the CPU clock speed would be 2500MHz , & that is really pushing the limit of the Barton. You'd definitely have to increase the CPU voltage to stabilize the system & that will heat up the CPU. Make sure you have a good cooling setup & increase the Freq in small steps, maybe 5MHz at a time & see how high it'll go before you run into problems.

Lock the AGP at 66MHz so it doesn't overclock along with the CPU, & disable all Spread Spectrum settings.

Also, make sure your DRAM Freq is set to 100% or SYNC (which ever setting is available). There's nothing to be gained by running your RAM at a higher freq than the CPU...actually, you'll take a performance hit. Always run them at the same speed. You have PC4200 listed but I assume that's a typo & you have PC3200? PC4200 would be wasted on that setup...


Hellz Yea!


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Response Number 3
Name: OVV
Date: January 29, 2006 at 10:03:57 Pacific
Reply:

I guess the guy was blowing hot air because when I set the jumpers, the machine wouldn"t boot at all. Thank God for these safe Bios's.
Anyway, I do stand corrected, I have a bar of 2600 and 3200 in the PC. The 4200's are in another machine I built with an Athlon 64. Guess I'm getting OLD!
Anyway, thanks for the responses. I can live with it running the way it is.

Cheers

OVV


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Response Number 4
Name: jam
Date: January 29, 2006 at 11:16:54 Pacific
Reply:

I have the A7N8X-X version & there is only one jumper that needs to be set & it's for the FSB. There are only two positions...one setting is for 200FSB (100MHz) ONLY. The other is for 266/333/400 FSB (133/166/200MHz).

I don't know what 2600 RAM is either. It's either PC2100 or PC2700...lol


Hellz Yea!


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Response Number 5
Name: OVV
Date: January 29, 2006 at 12:25:04 Pacific
Reply:

My motherboard goes 100/133/166/200
200/266/333/400
There is a jumper setting for each one

The 2600 ram runs at 133 and my bios shows the settings for it. Maybe it's because I'm in Europe but what do I know. Or like I said before, I'm getting OLD and perhaps the brain ain't quite working as it should.

Cheers

OVV


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Response Number 6
Name: jam
Date: January 29, 2006 at 14:00:29 Pacific
Reply:

Like I said, I have an ASUS A7N8X-X. I never even knew an A7N8X-XE existed until today. I'll see if I can find the manual & have a look.

OK, just had a look & there is definitely a different jumper setting for each FSB. And the BIOS for that board is totally different than mine...your's is lacking most of the overclock options. There's no adjustments for multiplier, AGP speed, CPU & RAM voltage, & no way to keep the RAM in SYNC with the FSB

Remember that because of DDR (Double Data Rate) technology, all these settings mean the same thing:

actual = effective = RAM

100MHz = 200MHz FSB = DDR200 (PC1600)
133MHz = 266MHz FSB = DDR266 (PC2100)
166MHz = 333MHz FSB = DDR333 (PC2700)
200MHz = 400MHz FSB = DDR400 (PC3200)

As far as I know, there is no such thing as PC2600, RAM unless that's a European thing too? Regardless of that...the RAM & CPU should run at the same bus speed. Set the FSB jumper for 333 (166MHz) & make sure your RAM runs at DDR333 (166MHz) too.

http://www.asus.com/products4.aspx?l1=3&l2=13&l3=208&model=595&modelmenu=1

Hellz Yea!


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Response Number 7
Name: OVV
Date: January 30, 2006 at 08:32:17 Pacific
Reply:

Thanks. I appreciate your input. I didn't know about the memory synchronization so that should help me get a bit more performance. I can run the machine at 2200 without going over 50°C with my jumpers set at 166 so I'll take what I can get. I don't know how the guy got his processor to run with the jumpers at 200. Mine wont boot after I set up past 176 in the bios.

Thanks again.

OVV


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