Photoshop CC -- OpenCL causes GPU temperature to rise instantly with no load

Hello all,

I've just installed Photoshop CC 64 and am finding that with "OpenCL" checked under performance, my graphics card (Nvidia GTX 670, 2 gb, with updated drivers) temperature immediately rises from 33 C to over 45 C, and "core" from 324 Mhz to 1,005 Mhz (yellow zone), with high memory usage, without even opening an image. This does not occur with CS 6 (13.1.2 x64) with OpenCL checked -- the temperature remains constantly in the 33-35 C range.  Does anyone have any ideas why this is happening?  Is it a bug in PS CC? (system: Windows 7, x64 pro, 24 gb ram, i5 3570k)

Thanks,

Art