Does Temperature Varies With 2 Motherboards On Same Model?

I Have An Intel DH55HC Motherboard And It Used To Maintain A Static Temperature Of 34C.However Since The Motherboard Was Under Warranty And I Was Facing Very Minor Issues,I Sent It To Intel And They Send Me A Replaced Board Of The Same Model And I Am Running It With The Same Specs,i.e.same CPU,PSU Etc.And Everything All The Same But Its Showing A Temperature Of 38c At Idle And Increasing Very High At Load.Why Is This Happening?Does It Mean The Board Is Faulty?Does Temperature Varies With The Same Model?Intel Is Refusing To Send My Original Board Back So What To Do Now,Ask For Another Replacement Or Will I Keep This?Besides The Intel Welcome Screen Is Also Loading Very Slowly.My Original Board Used To Load The Screen Instantly But This Replaced One Is Loading It Relatively Slower.