There are no keys for 6956 (or anything past 6801). There is no reason to worry about it. None of us will be using the builds that we are when the rearm doesnt work 120 days from now. Not even the Microsoft employees have these builds "activated".
System Manufacturer/Model Number Alienware® ALX X58 OS Vista Ult SP2/Win 7 Ult SP1/Win 8 Pro w/MC/x64/XP SP3 x86 in VM CPU Intel® Core™ i7-975 Extreme O/C to 4.02 GHz, 8MB Cache Motherboard Asus® P6T Deluxe V2 X58 LGA1366 Memory 12GB DDR3 SDRAM at 1600MHz - 6 x 2048MB Graphics Card 1792 MB NVIDIA® GeForce® GTX 295/Hauppauge HVR2250 TV Tuner Sound Card Onboard Soundmax® High-Definition 7.1 Performance Audio Monitor(s) Displays Samsung XL2370 LED backlit 23" W/S 2ms response time Screen Resolution 1920 X 1080
Keyboard Microsoft® Wireless Entertainment 8000 + Logitech® G15 Wired Mouse Microsoft® Wireless Laser 8000 + Logitech® G9 Wired PSU Alienware® 1200 Watt Multi-GPU Case Alienware® P2 ALX Chassis with AlienIce™ 3.0 Video Cooling Cooling Alienware® High-Perf. Liquid Cooling + Acoustic Dampening Hard Drives 2 x 500gb SATA II
1 x 1TB SATA II
1 external eSATA LaCie 1TB
(Non-RAID) Internet Speed 45mbps Other Info Using non-RAID on purpose as I find RAID to be too temperamental.
I've noticed no difference since switching.