I am upgrading my aging GeForce 7600 GT on Windows 7 Professional 64-bit (see graphics card specs and PC specs), which has also been unstable since I moved to 7. However, I only know a little about graphics cards.
I have tentatively narrowed my choices down to three cards within $100. I'll be using it in a single-GPU setup.
If you are going to consider an HD4650 you would want the DDR3 version. It is cheaper and significantly better; http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...
That said Psycho is right, the 9800GT is the most powerful of those cards. In terms of longevity though I would probably get this for $10 less; http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...
It's a bit less powerful than the 9800GT but not much and it is DX11 compatible.
From your screen shots I gather that your resolution is 1280x1024, either the 9800GT or HD5670 should be quite good but if you want something great for that resolution I'd spend a lil more on an HD4850 or GTS 250.
Why you ask?
Because they are faster
They have larger chips which include more Stream Processors, ROPs and Texture Units.
They also have larger memory buses and/or faster RAM.
As an example, the 4830, which performs about the same as a 9800GT, has double the Stream Processors and double the ROPs when compared to a 4670 or 4650.
It also has a 256 bit memory bus (vs the 4670's 128 bit) which gives a massive boost to memory bandwidth.
Go on , spend $29 more and get a 5750, it is honestly the better option,
Its as fast as the 4850, if not faster in some cases, It has DX11, Eyefinity, very low power consumption especially in idle, which will definately save you in the long run if you intend keeping it long, Shader model 5.0 HDMI with lossless sound pass through (Get that to work on 9800gt) and because of its manufacturing process and cool running it will overclock very well giving you 15%+ performance increase for free.
The best card for my price range seems to be the $95 Radeon HD 5670 (512MB 128-bit DDR5, 1000MHz ECS). It's a bit less powerful than the Radeon 9800 GT, but it has DX11 (jyjjy) and okini also recommends it. However, it's good but overpriced (outlw6669) and "utter garbage" (PsychoSaysDie).
If I spend more, the $147 Radeon HD 5750 (1GB 128-bit GDDR5, 1150MHz) looks much better. It has Eyefinity, lower power use, Shader 5.0, and lossless sound pass through (moricon). It has DX11 (moricon & jyjjy), and okini 55 also recommends it. It has crash issues in many games, but this might be fixed by tweaking voltage settings (and I can always return it).
Is this a fair summary? Are there better options, like a 256-bit equivalent of the Radeon HD 5750?
$136 — Radeon HD 4850 (1GB 256-bit GDDR3, 1986MHz) — powerful card, but no DX11 (jyjjy).
$98 — Radeon HD 4770 (512MB 128-bit GDDR5, 3200MHz) — better than 9800GT (Bluescreendeath), faster than original options (outlw6669), but no DX11 (jyjjy).
$105 — GeForce 9800 GT (512MB 256-bit DDR3, 1800MHz) — "all the way" (PsychoSaysDie), fastest of original options (outlw6669), +1 (okini55), most powerful of original options but no DX11 (jyjjy).
$55 — Radeon HD 4650 (512MB 128-bit DDR3, 1800MHz) — cheaper and significantly better than DDR2 4650, but no DX11 (jyjjy).
Wow.. sorry I missed that. At 1280x1024 no cards are really too weak, --so I think the difference is really only in how much you want to spend.
DX11 wont be a limiting factor for a few years at least--it might just make some games look better. Most games today still only require DX 9.. only a few of the newest require 10.
The GT 240 DDR5 is best at $70, 9800GT/5670 is the best card at $80, the 4850 is the best card at $100, the 5750 is the best at $135(all it has is DX 11--its the same power as 4850), the $5770 is best at $145.
Well if you want DX11 your options are basically the HD5670, HD5750 or HD5770.
The HD5670 will be good for your resolution, the HD5750 will be great and the HD5770 is overkill really but if you want a card that will last you a long while and perform very well it's a good choice if you can afford. It's also not much more expensive than the HD5750 and will serve you well if you do upgrade your monitor. This is a nice deal; http://www.newegg.com/Product/Product.aspx?Item=N82E168...