Quick follow up after trying at this again a few days back:
When installing SW1000XG into this PC and upon restarting, when it loads its drivers and configuration, the card emits a very loud buzzing noise and does not function. It is using the same IRQ as integrated Rage PRO graphics chip and IRQ Holder For PCI Steering (IRQ 9) as well as using an Memory Address FAFC0000-FAFFFFFF which is also a part of DEC21152 PCI to PCI Bridge whos range is FA000000-FBFFFFFF. Due to this memory conflict system would some times freeze up for a second or two when accessing folders and copying data.
Changing the IRQ causes an error message upon loading windows and explorer does not start. Changing the memory address causes an VSWXGDSP timeout and windows becomes frozen.
Tried everything in BIOS from disabling DAC Snooping, to disabling every possible device and changing various settings like ACPI to ON or OFF (IRQ9/10). I have tried every possible driver I have (2.0, 2.4, 3.4) and still it did not work.
But there is one and only thing I did not try, and that is placing the card into the FIRST PCI slot 😵
Once I did that the card works flawlessly (IRQ10 , FF000000-FF03FFFF). 😅 Hope this helps some one who is as stubborn about swapping PCI slots as me.
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