Apple eventually replaced the interconnect board (was a real drama to get them to do it) in my 4 core mid December last year. It's been on constantly since then and hasn't crashed since. The real test will be if it's still working perfectly in another year. I was previously getting gpu panics several times a day and could replicate the issue by leaving flurry running - it would always crash within 48 hours.
Having said that, the OS hasn't been rock solid in some time, and I've seen similar gpu/windowserver errors on my laptops. I've also been told by a tech that works for a reseller that they believe the issue can be caused by dust buildup around the exposed metal connector components, which can sometimes cause damage to the gpu's and interconnect board.
If anyone in the UK is really really stuck, I'm told GBM Digital in Manchester and MCC in Warrington have fixed certain instances of this issue, it's going to cost you a minimum of £379 plus an hours labour unless you have Applecare or a warranty/service contract with them though unless its covered under the programme. GPU's are on top of that price - the D300 is currently around £125 with the D500 and D700 being significantly more expensive.
Having said that, the OS hasn't been rock solid in some time, and I've seen similar gpu/windowserver errors on my laptops. I've also been told by a tech that works for a reseller that they believe the issue can be caused by dust buildup around the exposed metal connector components, which can sometimes cause damage to the gpu's and interconnect board.
If anyone in the UK is really really stuck, I'm told GBM Digital in Manchester and MCC in Warrington have fixed certain instances of this issue, it's going to cost you a minimum of £379 plus an hours labour unless you have Applecare or a warranty/service contract with them though unless its covered under the programme. GPU's are on top of that price - the D300 is currently around £125 with the D500 and D700 being significantly more expensive.