Graphics card question for Acer X1420G-U5832; is this a good upgrade?

The monitor is one thing connected that doesn't draw from the power supply as it has its own power, same for anything else that has an external power source (printers, modem/router, etc). Mouse, keyboard, hard drive(s), optical drives, memory, etc; those all are powered from the power supply.

Just fed your system specs here,

eXtreme Outer Vision - eXtreme tools for computer enthusiasts

which when paired with the 6670 comes in at around 203W system total, with a recommended of 253W. Basically comes down to a good quality 300-350 watt PSU would do, but with yours adding the card would really be pushing it. If you can fit it into the budget and aren't afraid of upgrading the PSU something like this,

Newegg.com - SeaSonic SS-300TFX Bronze 300W TFX12V v2.3 80 PLUS BRONZE Certified Active PFC Power Supply - Power Supplies

would be very good to go with the 6670.

I might not be factoring everything, but I'm seeing what you mean with the results. My plugging in somehow gave me 6W lower than what you quoted. It'd still be some time before I can actually get the upgrade in the first place, so additional ones aren't out of the question and I've got no problems upgrading the PSU if needed. The only thing I'd need to make sure if that it'd fit in what's essentially a Mini-ITX case, but from what I'm seeing about the supply you linked, it seems to fit in most of those just fine.

It's definitely something I'll keep in consideration, so thanks.

Welp, I had this coming. I ended up getting the 6570, since Newegg had it on sale during the weekend. Installing it into the computer itself went well enough, not too many issues in it. After that, it's been nothing but headaches. It'd freeze during most attempts to install the Catalyst drivers, if it didn't randomly fail for one reason or another. Some of these got to a point where I had to run System Restore and even the Startup Repair tool just to get the computer to operate outside of safe mode. I thought I was onto something when I installed only the display drivers (which was successful), but all that did was allow it 2-3 more minutes before a complete system crash and another System Restore to undo the damage.

As it stands, the card's still in the computer, but the drivers aren't installed and it's currently working that way. I'm afraid to now, and at wit's end over the ordeal aside. I doubt it's a power concern; it's got a much lower TDP (44W), and the PSU can handle up to 192 on the 12V rail (16 Amps, not 14 as I first "found"). If there's any assistance that can be given, it'd be appreciated.

EDIT: Attempting the 32-bit display drivers, in case it's some issue with the 64-bit ones despite this computer having full support for x64. Nevermind, I'm stuck having to get the 64-bit drivers if I want to do squat.

Possibly a false alarm. Installing an earlier driver (11.5, instead of 11.11) seems to have fixed it for the time. Still, I'm wary of this happening again, so please, if any help can be offered in the event these issues resurface, it'd be greatly appreciated.