I've had Intel engineering samples from work (we got them under NDA and such). They were tossing some Sandy Bridge engineering samples at some point and let us take them home. The hardware was buggy and didn't get microcode updates IIRC. The case and mobo was leaf blower loud and very unwieldy. I could run Linux for a few hours before it would segfault. I ended up trashing it. So I don't think an Intel engineering sample is better, I think it is worse.