Can Photoshop or Lightroom utilize double-precision capable GPUs for photographic image editing.

Hello - I need to upgrade my graphics card. Question can either Photoshop CS5 or Lightroom 5 utilize doubleprecision capable GPUs? Thanks much for your help.
Background: Application- photographic RAW files editing (no video editing.) Software- Photoshop version CS5 and Lightroom version 4, OS- windows 7 64bit, Hardware- Asus P8P67 Deluxe LGA 1155, Intel Core i5 2400 processor, 16GB SDRAM, SSD (apps/temp files), HD (archives), current videocard- Quatro FX 1500.

Let me start by saying I don't know what's inside the Mercury Graphics Engine. Certainly Adobe has not published anything stating the thing would benefit from double precision.
Double precision increases the floating point word size from where it carries 24 bits of mantissa precision to 52 bits, if I'm not mistaken. Since one each floating point number is used to represent red, green, and blue, even single precision floating point is going to give you all the accuracy of any document format.
From another perspective, your display only shows a maximum of 10 bits per channel -if you have 30 bit color. Most don't; most have 24 bit color, or 8 bits per channel of display accuracy.
I honestly don't know why the graphics card designers created the really deep formats - perhaps for specific CAD software or because scientific computing needs acceleration of very accurate calculations. I'm pretty sure Photoshop won't use it - at least not for a few versions yet.
-Noel

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