Regarding AMD Athlon 2600 plus upgrade in MSI board 133mhz - FSB

See also your link below, my problem is virtually identical in the problem I am having, both MSI boards exact same CPU, exact same result = black screen, no post no boot, no video.

http://www.computing.net/cpus/wwwbo...

All the above suggestions you offered in the above link were tried, it is very interesting, as I too have a 2600 problem almost a carbon copy of above problems experienced.

My system, MSI KT7 Turbo2 board
bios ver 3.6, 3x256 ram at 266mhz(ddr)
bus at 133 MHZ,
original CPU is/was a 1200mhz t-bird

The exact same CPU model and code as above was installed a 266mhz 2600 Athlon
and same result = black screen.
It should have come up without the need to clear the CMOS, but no dice, put the 1200 back and it comes up just fine, note I did not lose the ability to go back as happened to the previous fellow.

So, I tried to set the bios for the new processor, but the settings only allow a 15 multiplier, not 16, tried it anyway and it should run slower but stable, no dice, same black screen, it seems like the system is trying to go forward, hard drive up and running etc. replaced the 1200 and made it back into the bios, Anyway I tried several times to get it up and running, going back and forth between the 2 CPU's including clearing the CMOS at least 4 times (when the 1200 is put back I can see it succeeded as the date and everything else is at the defaults.)

One item that may be a problem is the default is a PCI card, not the AGP I am using, don't know if this is a factor in the black screen, but it is not as factor as far the 1200 is concerned, so can't imagine it would be for the 2600. Scratching my head for answers now.

I have built dozens of systems over the past 30 years and think that just possibly AMD, or MSI have not taken all the variables of the processor and board combos into account.

I have the 2600 that is on the green PCB like die, my 1200 is the dark colored ceramic type, I have also see the 2600 in a yellow PCB type and wonder if the different color CPU boards have any different properties that might not be listed. I think one might work and the other not and my luck to have the wrong combo? So far no evidence to support this whimsical explanation either.

It is supposed to work, but clearly does not. The CPU I have was tested and is guaranteed to work, this was my first suspect, but after reading the above story, I no longer think this is the reason.

Too bad the above person did not give us a final post, but I suspect he failed and having spend so much time on it, it was not worth throwing more good time after bad, thus admit defeat and move on.

I am getting close to that point and wonder if you can provide any further insight into this problem as I will try again if some useful suggestion can be given that has not already been tried.

And yes, the memory speed jumper for 100/133 is removed allowing 133 MHZ memory speeds.

Look forward to your reply, Thanks.

murray4200

Setting your multiplier 15x133=1995
Your Tbird 1200 M setting 9x133=1200
Unable to change fsb @133
Unable to get to overclock to 2600

"And yes, the memory speed jumper for 100/133 is removed allowing 133 MHZ memory speeds".

don't you normally just change the position, not remove altogether?

larry

What kind of PSU?

Did you mean K7T, if so have you a revision 5 motherboard ??

K7T Turbo2
MSI-6330
PCB Version 5
BIOS Version W6330VMS.360

http://global.msi.com.tw/index.php?...

"the settings only allow a 15 multiplier, not 16, tried it anyway and it should run slower but stable"

No, it shouldn't. The multiplier on the CPU is locked at 16x & can NOT be changed. You have to set it to either 16x or AUTO...anything else will prevent the system from booting.

Are you certain you have K7T Turbo2??

There are three versions that use the MS-6330 model number - two of K7T Turbo, one of K7T Turbo2 - two are mboard Rev. 3, only Turbo2 is Rev. 5 (see the cpu support pages for each version).
The bios updates appear to be the same, but only Turbo2 (Rev. 5) can support 2600+ 266mhz cpus.

Are you certain you have the 2600+ that runs at 266mhz, the Thoroughbred version - AXDA2600DKV3C ? They are relatively rare.
None of these mboards support the much more common 2600+ Barton version - AXDA2600DKV4D - which runs at 333mhz.

If you updated the bios yourself, or in any case if you're not sure if it was done, load bios defaults in your bios Setup. You must load bios defaults after having flashed the bios in order for the contects of the Cmos to match the bios version - otherwise you likely have a mix of old and new settings in the Cmos. I've heard of cases where loading bios defaults sometimes works when clearing the Cmos or removing the battery doesn't.

There is no AMD cpu that is 2600 without the plus.
The later AMD Cpus, current to 2005:
http://images.tomshardware.com/2005...

Oops.

The later AMD Cpus, current to 2005:
http://images.tomshardware.com/2005...

If that doesn't work, go here and click on the tiny hammer icon on the bottom corner of the chart:
http://www.tomshardware.com/2005/11...

Great, many thanks for all the posts. will reply to all here.

Responses #1 & #2, my reply - yes, FSB is 133mhz by removal of the jumper next to the memory.

Response #3 - the PSU is an Antec 400 watt unit, can find the numbers if you think this might be an issue.

Response #4 - sorry, it is a K7T Turbo2 main boars and yes, it is MSI 6330. Unsure of the pcb version, but the bios version you state is absolutely correct.
BIOS Version W6330VMS.360

Response #5 - Thanks, I have tried auto and 15, neither worked. It appears this is part of the problem.

Response #6 - definitely Turbo2 mobo, also definitely the 266 mhz thoroughbred cpu in hand. *** have never loaded the bios defaults after updating the bios, this may be a possible fix, will try and report back the result, if the 16 multiplier is then present, (now missing) then it may be the missing link. And yes, it is the 2600+ cpu I have.

Many thanks for all the posts, more soon.
Thanks all again, Murray :)

Just now, I went into the bios and loaded the optimized defaults, then the fail safe defaults, and the CPU 16 multiplier is still not present as an option.

All I can think of at this time is to re-flash the bios, and hope it shows up. Thus it appears the 2400+ is as fast as the current bios can support, but MSI bios upgrade page clearly shows the 2600+ as a supported CPU for this board, and the sole reason it was purchased.

Any further info much appreciated, again many thanks thus far. Cheers, Murray :)

murray4200

You definately have the Rev 5 mboard?

"W6330VMS.360"
When I hold my cursor over the version 1.3 bios version download link gotten to via the USA site, on proper Turbo2 bios updates page , that isn't the name of the download displayed - similar, but not the same.

Did you go to MSI site in the the region you bought the mboard in? MSI sometimes has slightly different mboards available in different regions, that may require different bios updates.

The ONLY time I have ever used the wrong bios update for a mboard was for a MSI socket A one - pictures of mboards (MS-6712) in 2 different regions looked absolutely identical - the difference was one of the main chipset chips was different, but it was covered by a heatsink so you couldn't tell the difference by looking at it without removing the heatsink, which requires removing the mboard from the case to release the heat sink retaining pins. It no longer boots - the bios chip is not removable - it was cheaper to replace the mboard than fix it.

Do you have AXDA2600DKV3C ?

If you don't, I know from previous research there is at least one (maybe two) MOBILE version(s) with a different code that run(s) at 266mhz, and mobile CPUs are often NOT detected or supported by desktop computer bioses/mboards.

I emailed Gigabyte about such a 2600+ cpu - they said the mboard I wanted to install it in - GA-7ZMMH - could not recognize or support mobile cpus with any bios version, and I seem to recall they said none of their desktop boards recognize mobile cpus.

E.g the MP cpu here, AMSN2600DKT3C:
http://www.amd.com/gb-uk/assets/con...

I seem to recall I also came across one other mobile version with yet another code that uses a slightly lower core voltage.

There's a small chance there is a bios upgrade available from other than the manufacturer that DOES support mobile cpu's, but it will probably cost you money - e.g. look on sites that specialize in bios upgrades that support everything possible your mboard can support.