"The benchmark had a much more stable feeling than Vantage and was a much shorter benchmark — both very nice features for a benchmark. The return of free testing should help increase the popularity of 3DMark 11 compared to 3DMark Vantage, which was a one shot ordeal unless people paid for one of the upgraded editions. All in all, it looks like Futuremark learned from its experiences with Vantage and the reception it received and used that knowledge to greatly improve the new benchmark!"
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips