Decided to buy a new system, looking for thoughts on 7800GT vs. GTX

[J1M]

Pretty much what the title says. The cost to upgrade from a GT to a GTX would be about $125, I'm wondering if there is anything I should know about the differences. I thought I read somewhere that the GTX doesn't make use of all 24 pipes at the same time, but I can't remember where.

[cnbc]

I say stick with 7800GT, unless you have a UXGA or higher res monitor. Under load, GT uses almost 20% less power than GTX.