Only two months after its initial release, Samsung has upgraded the Galaxy S5 with a better SoC, screen, and modem. The new S5 is officially called the "Galaxy S5 LTE-A" and is only available in Korea.

Samsung is kicking the screen density wars to even crazier new heights with the souped-up Galaxy S5. The company fitted a 2560×1440 panel to the 5.1-inch S5 body, giving it a (highest ever?) 577 PPI. That beats the LG G3, which had a meager 534 PPI. Like the G3, these super high pixel densities are not really visible to the human eye, so they mostly just cost more and waste battery life. Samsung will win the spec sheet battle, though.

The original Galaxy S5 had a Snapdragon 801, but this new version is one of the first phones to have a Snapdragon 805 . The primary upgrade from the "old" S5 to the new one is a faster GPU, the Adreno 420. Qualcomm says that clock-for-clock, it's about 40 percent faster than the Adreno 330 in the Snapdragon 805.

We tested the 1440p LG G3 a few weeks ago and felt that the GPU occasionally struggled to keep up with the higher resolution. The speedier GPU on the new S5 will hopefully keep things running smoothly. Higher memory bandwidth should help with the higher resolution display, too. The 805 has a new quad-channel LPDDR3 memory interface that boosts bandwidth from 12.8GBps to 25.6GBps. The data connection is faster, too. As the name implies, the new phone supports Korea's LTE-A band, which can hit download speeds of up to 225Mbps.

While the device is only available in Korea, we've long heard rumors of an all-metal "Galaxy S5 Prime" eventually coming to market. The supposed specs of the "Prime" include a 1440p screen and a speed boost, and the phone was rumored long before the LG G3 hit the market. We're wondering if the guts of the Galaxy S5 LTE-A phone will eventually come stateside, just with a new exterior.