One of the reason 3d mark is no longer a benchmark. IIRC they did start compiling for Intel and had some very friendly Nvidia code.
It also has some very firendly AMD code. All the hallmarks of well optimized code
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.