I just installed an AXDA2600DKV3C 2600+ in my PCCHIPS M811LU mb, and it reads 2000+ with an actual speed of 1.67GHz.

I can't find instructions on how to overclock or otherwise improve the speed -- obviously I took the cheap route to upgrade existing build config, so any help is appreciated.

Thanks in advance.

You have the CPU freq set at 100MHz (200MHz FSB) when it should be set at 133MHz (266MHz FSB).

Jam -

Thanks for the reply -- I'll check/change the JP2 setting once I get home and advise back.

I haven't changed BIOS from the factory defaults, should I change the DRAM Clock or CPU Host Clock settings? Or even flash update it (a later version is available)?

Thanks for the help!

You should never run the default settings. They should only be used for the initial setup or for troubleshooting purposes. If you want to get the most out of your system (this one or any other), you should always manually configure the BIOS settings.

As you said, check the JP2 jumper & make sure it's set to 2-3. And with a socket A system, ALWAYS run the CPU:DRAM ratio at 1:1. In other words, both the RAM & CPU should run at 133MHz.

http://www.pcchipsusa.com/PCCWebSit...

Well, that was not it. The MB JP2 was already set at 133, and changing the jumper dropped the chip down to 1.25GHz.

Any other solutions? I haven't tried to flash BIOS yet, and the PCCHIPS website points out the new rev fixes problems with AMD Athlon chips -- but I don't want to flash unless absolutely necessary.

Any other ideas? Thanks for responses thus far.

If your CPU has a 12.5x multiplier, it's NOT an AXDA2600DKV3C, it's an AXDA2600DKV3D which is the 166MHz (333MHz FSB) version of the XP2600+.

You're not gonna get it to run at the proper speed on that board.

Not sure I follow -- I'm running just under 1.7ghz, which is FSB133 x 12.5. Would the 166 CPU even run on my mb at 133mhz?

I will triple check the model is the 16x 133 version, and if so I think my only hope is to somehow up the multiplier on the mb to 16x via BIOS flash. Unless someone has another idea that doesn't include a different cpu/mb.

Thanks.

"Not sure I follow"

The vast majority of Athlon XP's had the multiplier locked. You stated your XP2600+ is model AXDA2600DKV3C which would have default clock settings of 16 x 133MHz. If the freq was set to 100MHz instead of 133MHz, it would run at 1600MHz, but apparently it's running at 1667MHz, correct?

The AXDA2600DKV3D has default settings of 12.5 x 166MHz.

The XP2000+ has default clock settings of 12.5 x 133MHz.

In other words, both the XP2000+ & XP2600+/333MHz FSB version use the same 12.5x multiplier setting. Since your CPU is being recognized as 2000+, it appears that you have the "D" model of the 2600+. Your board doesn't support 166MHz, so it's running the CPU at 133MHz.

You either need a different motherboard or a different CPU...or just live with the fact that your CPU is running 20% slower than it should.

I haven't given up just yet -- am trying to flash bios since the text says the updated bios address an athlon xp problem.

But the system hangs when I'm trying to flash -- I've the protect BIOS disabled, and have both the EXE and BIN files on the boot floppy. The system hangs after it asks me if I want to save BIOS.

Anybody?

The BIOS flash isn't gonna help. Your board is based on the VIA KT266A chipset. See the 266?? That means 266MHz. Your does NOT support 333MHz FSB CPUs.

As for the flash problem, make sure the floppy isn't write protected. I usually boot off a WinME boot floppy, select option #4 (minimal boot), then when it stops at the A:\> prompt, I remove that floppy & replace it with a floppy containing the flash utility & BIN file. Then all you have to do is type awd816a at the A:\> prompt, hit enter & follow the instructions.

Make sure your board is the correct PCB revision. The BIOS at the PCChips site is for PCB:V3.1

I have the 2600+ Barton. It should install and read as 1.9g = 11.5x166/33@1.6v default.

I been running it 11.5x182/36@1.7v=2.09g stable for a few years. If pushed to 11x200/40@1.8v=2.2g It runs, but sometimes the 'unsupported freq. settings' error kicks in after a reboot and the settings go below default. The max this chip goes is ~2.4g = 11x220/40@1.85v I'd rather keep my chip around so I keep it conservative.

Good luck poster.

[This comment has been removed due to legal action taken by the Church of Scientology.]

Well, I was able to flash the bios only after swapping out the original 1800+ CPU (which read correctly) and memory. After flashing I swapped for the 2600+ chip, and it still read 2000 in bios.

The M811LU mb doesn't allow overclocking, so I pushed the FSB as far as I could and got the CPU up to ~1.8gh -- not enough of a bump for editing HD footage.

Long story short, I bailed on the cheap route and bought a new mb with a 5200+ chip that should run around 2.6gh and overclock to around 2.9.

Thanks for the responses.

David