I have been up to my old tricks again (Soldering Iron + PSU).
Picked up a HP Z600 to replace the XW6600, and thanks again to HP their mid range workstations only come with a single PCIE power connector.
Only this time, the set up for the power delivery was actively going against piggy backing a second connector off a standard molex. It seemed to be working fine for a while folding away on the GPU but then the restarts began to kick in.
Turns out, the one dedicated power line for the GPU wasn't dedicated at all. it was sharing its 18 amps with the storage drives and everything else that could be attached to the single wire that was home to molex and SATA power cables.
The strange thing is there are two other 18a power lines feeding into the motherboard on top of two 14a rails for the cpus and another for the memory. So there is plenty of power to go around, us stander users just arnt allowed access.
So as before I have cracked open the power supply and soldered in two wires to feed the GPU so the load is going to be balanced between the three rails. Just wating for the shops to open to go and grab a PCIE power connector.
I gave it a dry run with MSI Afterburner & Kombuster and, with the wires just held in place it didnt restart where as before it would instantly cut power.
Once I have an connector I will give the thing a proper test and then should be back producing points again.