Slow RAM
It has been reported that Wii U has 2GB of DDR3 RAM and is 43% slower than 360 & PS3 RAM over on neogaf after a teardown.
http://www.neogaf.com/forum/showthread.php?t=500362Wii U has 2GB of Samsung DDR3 memory running at a max speed of [12.8 GB/s]
Comparison to other systems
360: 22.4 GB/s + eDRAM for framebuffer
PS3: 25.6 GB/s main memory BW + 22.4 GB/s graphics memory BW, no eDRAM
GTX 680: 192.2 GB/s
Game performance
Mass Effect 3, Ninja Gaiden 3, Batman Arkham City, Epic mickey 2, Blops2 have techical issues on the Wii U.
Mass Effect 3:
Without question, it has a few issues. This version of ME3 seems a lot less visually stable than, say, the Xbox 360 version -- the frame rate is choppier, the animation seems rougher. The audio suffers, too
Ninja Gaiden 3:
CODBLOPS2:Visually, Ninja Gaiden 3 is hardly going to make your PS3 and Xbox-owning friends envious. In fact, Razor’s Edge is arguably uglier than its cousins, with bland textures and a bad case of the “jaggies” combining to create a muddy look that would’ve been called out seven years ago during the Xbox 360’s launch. Still, the framerate stays (mostly) smooth, which is crucial for a game
The Digital Foundry article featured the first area benchmarked on PS3 and 360. During some of the parts they show the framerate flucuates between 45-50 fps dropping as low as 40-ish on PS3 during the slowest point. On WiiU? Yeah, that same area (right before the chopper) sinks UNDER 30 fps. It's juddery and choppy. On average the framerate seems to spend a lot of time around 50 fps.
Now, it generally doesn't sink THAT low during gameplay but it spends way too much time under 60 fps. The 360 version is much smoother and even the PS3 version seems to have an edge. The image quality seems more in line with 360 at least, which is to say that it's jaggy as hell, but not blurry like 1.02 on PS3.
The shadows are also nasty. Until you stand right up on them, they appear at a very VERY low resolution and only resolve into higher detail when you press your face right up against them.
Also - Dark10x's comments in the other thread mention the game runs pretty poorly (30 fps in the first level). And it's missing details and has worse lighting.
Wii U
X360
Read more for other games on - http://www.neogaf.com/forum/showthread.php?t=500078