How much card is too much card for a non gaming user? I feel that soon the internet will be using the GPU instead of the CPU to render unwanted advertising so that non gamers will have use for more Graphics Processing, to make sure that all the unwanted graphic cluttering up my screen is even more distracting. I don't want to buy a jet fighter to taxi to the store,of course I like that it'll get the tail gaters off my pASS but the fuel will cost too much, besides, getting to the fueling stations will be a she dog. For sure having a 5970 in a non gamers PC is not only redickless I think there is a law against that? Having to sell a kid or kidney on ebay to buy it really doesn't add to the joy of acquiring it either.
I have a 4670 now and it's fine but I want to up grade for no real good reason and I will go a little over board. I want to get a five series ATI but I don't want to break that unwritten law about non gamers having too much card when there are gamers that go to sleep without having played with a good card. I think it is related to not wasting food because some kid is going to bed without eating.
Is a 5770 way too much for someone that watch online videos, check email, have a lot of windows open at once, lot's of browser tabs open and all on a 52 inch HDTV?
The HD4670 is already overkill for non-gaming purposes. Your post shows a general lack of understanding of how video cards operate. Getting a gaming card is not going to make non-gaming computing superior in any way whatsoever. The ATI HD5xxx series does have some extra features for video/sound playback but I would read up on it and make sure they have any bearing on your set up before wasting money on an upgrade you can't use. If you do end up wanting one of the new card the most you should consider is probably the HD5570.
Are you saying that if browsers start using more GPU instead of CPU in HD videos that the 4670 will still be good on a 52 inch HDTV?
One more thing, if you see my system specs you'll see that I have an overkill PC for someone that watches videos online and check email so I a little overkill should be in order, a little, wouldn't you say?
Your 4670 is enough to power your hd tv. I just had a gpu failure, and had to put a previously taken out ati 2400 pro 128meg card back in to service. That card has much less power than your 4670. Took a little trial and error, but I'm getting smooth playback via hdmi~dvi adapter. 720p, also running a 17 inch monitor at the same time.
The size of the display doesn't matter, it is the resolution that is important. Your TV is likely 1080p which is 1920x1080 and yes the HD4670 is more than capable of video playback at that resolution.
For your other question no... overkill was never in order, it's just a waste of money really. Compounding initial overkill with more is just continuing to waste money. If you want some overkill get the HD5670 I guess. It's the maximum that can be considered reasonable in a non-gaming system.