***It is a long list, we know, but to find your card real quick, press ctrl F and a search box should appear on the bottom or a window that pops up, simply put the number of your GPU and click on the 'up/down' or 'find/search' buttons. Example: You want to know if your 6670 will run, type in 6670! If you want to know if a 580 will run, type 580!***-tgl1992
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Egad!!: I'm fairly certain these will give you the highest settings with all settings turned up.
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GeForce Mars II Dual GTX 580 3GB
Radeon HD6990 4GB
GeForce GTX 590 3GB
Radeon HD6870X2 2GB
Radeon HD5870X2 4GB
Radeon HD5970 4GB
Radeon HD5970 2GB
GeForce GTX 580 3GB
GeForce GTX 580 1536MB - GeForce GTX 460 2Win 2GB
Radeon HD6970 2GB
GeForce GTX 570 1280MB
GeForce GTX 480 1536MB
Radeon HD6950 2GB
Radeon HD6950 1GB
GeForce GTX 295 1792MB
Radeon HD4870X2 2GB
Radeon HD5870 2GB
Radeon HD5870 1GB
GeForce GTX 560 Ti 1GB
GeForce GTX 470 1280MB
Radeon HD6870 1GB
GeForce GTX 560 1GB
Radeon HD5850 1GB
Radeon HD6850 1GB
GeForce GTX 460 2GB
GeForce GTX 285 2GB
GeForce GTX 460 1GB
GeForce GTX 465 1GB
Radeon HD4850X2 2GB
Radeon HD4850X2 1GB
GeForce GTX 285 1GB
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High at least: Mileage may vary, but these are well-performing cards that could put you in the max criteria depending on resolution. Some of these cards may be "outdated," but are all rather good and will definitely be able to play Skyrim and look nice at the same time.
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GeForce GTX 460 768MB
GeForce GTX 460 SE 1GB
Radeon HD5830 1GB
Radeon HD6790 1GB
GeForce GTX 275 1792MB
Radeon HD4890 2GB
GeForce GTX 280 1GB
GeForce GTX 275 896MB
GeForce 9800GX2 1GB
Radeon HD4890 1GB
GeForce GTX 260-Core 216 896MB
GeForce GTX 550 Ti 1GB
Radeon HD4870 1GB
Radeon HD5770 1GB / HD6770 1GB
Radeon HD4870 512MB
GeForce GTX 260 896MB
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Medium-High Levels: Several cards from years past, but they've still got lots of power in them and will be able to truly enjoy Skyrim.
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GeForce GTS 450 1GB
Radeon HD3870X2 1GB
Radeon HD5750 1GB / HD6750 1GB
GeForce GTS 250 1GB
Radeon HD4850 1GB
GeForce 9800GTX+ 512MB/GTS250 512MB
GeForce 8800 Ultra 768MB
Radeon HD4850 512MB
GeForce 9800GTX 512MB
GeForce 8800GTX 768MB
Radeon HD4770 512MB
GeForce 8800GTS 512MB (G92)
Radeon HD6670 1GB
Radeon HD4830 512MB
Radeon HD5670 1GB
Radeon HD5670 512MB
Radeon HD6570 1GB
GeForce 8800GT 1GB/9800GT 1GB
GeForce 8800GT 512MB/9800GT 512MB
Radeon HD2900XT 1GB
Radeon HD4730 512MB
GeForce 9600GT 1GB
GeForce 9600GT 512MB/GTS240 512MB
GeForce GT 240 1GB
GeForce GT 240 512MB
Radeon HD2900XT 512MB
Radeon HD3870 512MB
GeForce 8800GTS 640MB (112SP)
GeForce 8800GTS 640MB
Radeon HD4670 1GB
Radeon HD4670 512MB
Radeon HD2900Pro 512MB
Radeon HD3850 512MB
GeForce 8800GT 256MB
GeForce 8800GTS 320MB
GeForce 8800GS 384MB/9600GSO 384MB
GeForce 9600GSO 768MB
GeForce 9600GSO 512MB (G94)
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Medium to Low-Medium Levels: Mostly cards from years past, but they've still got some power in them and wth the right tweaks, should be able to enjoy Skyrim. The X360 rough video card equivalent is a X1800XT, but it does have a strong CPU. Still, should give some idea where you stand. The PC game is still worth getting even with these cards IMO, but an upgrade would be a good idea too. The 512MB version of cards are going to fair better than the 256MB of the same card....we'll see when the VRAM requirements come out how things stand for the 256MB cards. These days, you should have a card with at least 512MB of VRAM though for a game like this that can be texture-heavy.
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Radeon HD5570 1GB
GeForce GT 430 1GB
Radeon HD6450 1GB
GeForce GT 520 1GB
Radeon HD5550 1GB
Radeon HD3850 256MB
GeForce 7950GX2 1GB
GeForce 7900GX2 1GB
Radeon X1950XTX 512MB
GeForce 7800GT Dual 512MB
Radeon X1900XTX 512MB
Radeon X1900XT 512MB
GeForce 7900GTX 512MB
Radeon X1950XT 256MB
Radeon X1900XT 256MB
GeForce 7900GTO 512MB
GeForce 7800GTX 512MB
GeForce 7950GT 512MB
Radeon X1950Pro 512MB
Radeon HD2900GT 256MB
Radeon X1950Pro 256MB
Radeon HD4650 512MB
GeForce 8600GTS 512MB
GeForce 8600GTS 256MB
GeForce 7900GT 512MB
GeForce GT 220 1GB
GeForce GT 220 512MB
GeForce 9500GT 1GB
GeForce 9500GT 512MB
Radeon X1800XT 512MB
GeForce 7900GS 512MB
GeForce 8600GT 512MB
Radeon X1950GT 512MB
Radeon X1900GT 256MB
Radeon X1800XT 256MB
GeForce 7900GT 256MB
GeForce 7800GTX 256MB
GeForce 7800GS Bliss+ 512MB
Radeon X1900GT Rev2 256MB
GeForce 7800GT 256MB
Radeon X1800XL 256MB
GeForce 7800GS 256MB
Radeon X1800GTO 256MB
GeForce 8600GT 256MB
Radeon X1650XT 256MB
GeForce 7600GT 256MB
Radeon HD2600XT 256MB
Radeon HD3650 256MB
Radeon HD4550 512MB
Radeon HD5450 512MB