Tyan Tiger MPX S2466N + AthlonMP 2600

[wookstah]

OK; I'm in the process of trying to upgrade a couple of these boards (S2466N and S2466N-4M) from AthlonMP 1800's to AthlonMP 2600's. According to Tyan, the latest BIOS should allow for the 2600's fine, so I'm kinda stumped as to what's going on at the moment.

Flashed to the latest version of the BIOS, and the flash updated the BIOS correctly. Removed the 1800's, installed the 2600's, and the machine would not boot or POST. No beep codes, no video signal, no nothing. Apparently with the newer revision BIOS it takes a bit longer with ECC memory (which I have in the machine), but that does not seem to be the problem.

Removed the 2600's, re-installed the 1800's, and still nothing. Video and RAM work in a 2nd motherboard properly, as does the BIOS chip itself. Only thing left for me to do is test the CPUs (1800's and 2600's) in the 2nd motherboard, but I'm somewhat worried that it will somehow fry that mb as well. Trying to get in touch with Tyan support at the moment as well, so I'm just throwing this out here to see if anyone can give me an idea as to what I may be missing.

 

[mastertech01]

Try clearing CMOS if you havent already, then try one processor at a time in each socket.

 

[cygan]

like master said, try the 1800 on the 2nd mobo. If it works fine on that one, do u have a backup of the original BIOS. I am afrais, you will have to flash the old mobo again with the older versionof BIOS, and then try again with 1800. Once this thing is set, then try the flash exercise again.

 

[wookstah]

CMOS was cleared to no effect. Bios seems to work fine; pulled it from the non-working MB and placed it on a working one, booted up fine. Vice versa unfortunatly did nothing. Also tried 1 CPU at a time (both 1800 and 2600), also one socket at a time (total of 4 tries, 1 for each CPU slot and each CPU)

The only other thing left for me to try is to boot another machine off one of the 1800's in the morning and see what happens. There's no possibility of a CPU somehow damaging the motherboard, is there? This one really has me stumped.

 

[wookstah]

OK; got into work this AM and started testing things. I've now tested the original CPUs from the non-working boxes (1X MP2000, 2X MP1800), and I can't seem to get it to post on a motherboard that I know to be working. That means that (somehow) after installing the 2600's and not seeing any sort of POST, dropping back down to the 1800's caused these CPUs to become non-working. Idears?

I'm afraid to put a working CPU into that motherboard now, on the off chance that (somehow) it fries them. The only thing left for me to try is the MP2600's in my test box, so if anyone has some random thoughts to add feel free.

 

[mastertech01]

Best thing I can suggest is to ask around over at www.2cpu.com forums. A lot of dually experience over there. I have had about 8 of these MP chipset boards with various processors and was fortunate to never had a bad processor, but I did have a few bad boards and seems I had some problems with all of the boards, or ram, USB, or something new every month. They are great setups when working right and using the perfect mix of components, but very laborious to find that perfect mix. I use all SCSI components for data so that helped a lot.

The only other suggestion I personnally have is make sure you have a healthy PSU because 2600 processors need it.

 

[wookstah]

Master, tnx for the idea. I've just posted on their board to see if they have any ideas. I'm still trying to figure out how exactly 2 MB's and 3 CPUs (with a posibility of 2 more) could have been cooked, and I'm hoping that my overworked / overstressed state is causing me to overlook something stupid.

As for PSU, they are 400 watt Antec (PP-412X) running a single HD and DVD-Rom, so I can't see that as being the issue. (I hope). But I tested one of the PSUs on a dual 2400 we have in the office, and that machine boots and works fine, so hopefully that eliminated the PSU idea.

Sigh. I swear, I totally give up on all hardware from this day forth