W2600CR won't Boot post code 35h

Hi

I have purchased an Intel W2600CR board - PBA G21602-306 and cant get it to boot.

It either comes up with Orange System Status LED and LSB lit or I get Green System Staus LED and post code 35h (LSB,#2,#4,#5).

I have tried a single E5-2670 and dual E5-2670 CPUs. (V1 CPUs)

If I remove the memory I get 3 beeps as expected.

The memory I have in is Hynix 4GB 2Rx4 PC3-10600R-9-10-E1 at the moment just a single DIMM.

But I have aslo tried up to 4 DIMS from my Dell C6100 with no success.

Any advice appreciated.