Qualcomm or Nvidia
The Transformer Pad Infinity features the same Super IPS+ technology that's also in the Prime. It's one of the few displays that can be viewed outdoors. Only the BlackBerry PlayBook has a higher brightness out of all tablets we've tested. After the 500 candela per square metre the next brightest tablet is the Lenovo Thinkpad Tablet with 400 candela. Of course, if the sun is shining directly on the tablet you're still going to have trouble viewing it, partly because of the glossy screen.
During the announcement of this tablet during the MWC last February in Barcelona we were told that a version of this tablet would appear with a dual-core Qualcomm MSM8960 Snapdragon S4 Krait SoC. It exists, but only for the US market. Most likely that is because LTE(4G) networks already are available there. Nvidia recently announced it has an LTE chip now and that it can be used on the Tegra 3, but that late-May announcement came too late for the Infinity.
Qualcomm Snapdragon S4 for the 4G models...
You can wonder why ASUS didn't choose to equip all Infinity tablets with a Snapdragon S4. We don't know 100 percent why, but the Snapdragon S4 has 28 nm transistors and not 40 nm transistors like the Tegra 3. These have better performance per core and are more energy efficient. The problem is that the TSMC factory that manufactures the Snapdragon S4 chips is not able to keep up with the high demand, so there currently is a shortage of the chips. That, combined with the fact that 4G hasn't been completely rolled out yet in Europe, would be a logical explanation for why ASUS opted for the Tegra 3 chip in the European release of the Transformer Pad Infinity.
...Nvidia Tegra 3 for the European versions.