Galaxy S4 rear

At yesterday's big Samsung Galaxy S4 announcement, the manufacturer revealed that multiple versions of the phone would be produced running differing CPUs, as was the case with last year's Galaxy S3. Certain markets, including the U.S., will get a 1.9GHz quad-core chip powering their S4, while other territories, including the UK and Europe, would get an octa-core Samsung Exynos 4 chip at 1.6GHz.

However, there was some confusion as to exactly which quad-core chip would be fitted in the quad-core Galaxy S4 -- Qualcomm's new Snapdragon 600, or the slightly older Snapdragon S4 Pro. Today a Qualcomm spokesperson has confirmed to us that the quad-core Galaxy S4 is indeed packing the faster Snapdragon 600 chip, so hopefully we can all avoid any more sleepless nights worrying about that one.

The U.S. variant Galaxy S4 joins the HTC One and LG Optimus G Pro, which will also ship with Qualcomm's latest chip. While the S4 Pro, found in devices like the LG Optimus G and Nexus 4 is certainly a capable chip, we'll always welcome a little more processing horsepower -- Qualcomm claims its new chip offers an up to 40 percent increase in performance over the S4 Pro.

More: Hands-on with the Samsung Galaxy S4​; Galaxy S4 forums