After following the instructions posted here and elsewhere I set about the task of swapping out my 2.26 x 2 for W5590 x 2 matched pair I got from a computer dealer on Ebay here in the UK. (SLBGE COSTA RICA 3.33GHZ/8M/6.40 - both cpus have the serial number 3944B323).
I upgraded the firmware to 5.1. I got good thermal paste. I researched like mad.
I got CPU A working fairly easily but CPU B just would not boot up. I tightened in tiny turns until eventually the red cpu warning light came on. I loosened, tried again. For hours. Days.
Eventually I wondered if the processors itself was fault so moved the cpu in socket B to socket A. Again it booted fine. Then when I installed the one that was in socket A into socket B it again refused to boot.
I have the required 2mm of thermal padding. I snipped the fan connectors exactly as outline on here and both heatsink fans are firmly connected and functioning.
My next idea was washers - so I bought 1mm aluminium washers and two on each pole. Again, cpu booted easily enough, but cpu B still refused. Once or twice it nearly booted - but the screen filled with lots of kernal panic black text. Next time, zilch.
At one point I thought I might have damaged the pins in the cpu tray and got hold of a brand new cpu tray. One of W5590s was left with a slight mark on the underside - but it worked fine in socket A when I tried it. Then I installed the second one into soclket B and again, nada.
Then I reinstalled the 2.26s and they worked. In both cpu trays. (So that second tray looks to have been a needless purchase. Sigh.)
I just wondered if there were any obvious errors I made in the process. I can get either W5590 to boot up in socket A. But when I put the other processor in socket B, nothing happens. No boing, no start-up screen, except for the one or two times when the kernal panic text spewed down across the screen.
This experience has been a most exquisite torture - and I am on the verge of surrendering...
I upgraded the firmware to 5.1. I got good thermal paste. I researched like mad.
I got CPU A working fairly easily but CPU B just would not boot up. I tightened in tiny turns until eventually the red cpu warning light came on. I loosened, tried again. For hours. Days.
Eventually I wondered if the processors itself was fault so moved the cpu in socket B to socket A. Again it booted fine. Then when I installed the one that was in socket A into socket B it again refused to boot.
I have the required 2mm of thermal padding. I snipped the fan connectors exactly as outline on here and both heatsink fans are firmly connected and functioning.
My next idea was washers - so I bought 1mm aluminium washers and two on each pole. Again, cpu booted easily enough, but cpu B still refused. Once or twice it nearly booted - but the screen filled with lots of kernal panic black text. Next time, zilch.
At one point I thought I might have damaged the pins in the cpu tray and got hold of a brand new cpu tray. One of W5590s was left with a slight mark on the underside - but it worked fine in socket A when I tried it. Then I installed the second one into soclket B and again, nada.
Then I reinstalled the 2.26s and they worked. In both cpu trays. (So that second tray looks to have been a needless purchase. Sigh.)
I just wondered if there were any obvious errors I made in the process. I can get either W5590 to boot up in socket A. But when I put the other processor in socket B, nothing happens. No boing, no start-up screen, except for the one or two times when the kernal panic text spewed down across the screen.
This experience has been a most exquisite torture - and I am on the verge of surrendering...