Samsung Confirms Exynos 5440 Quad-Core Processor
Chip has been rumored to be powering Galaxy S4.
The Exynos 5440 quad-core processor, which is rumored to be the chip powering Samsung's Galaxy S4, has been confirmed by the technology giant.
Samsung confirmed the quad-core chip's existence through its Kernel Git webpage. The chip itself is based on the dual-core version found in the Nexus 10 tablet, which it developed for Google.
Production on the Exynos 5450 chipset for the Galaxy S4 has previously been rumored, with the unannounced smartphone itself set to be unveiled during CES, 2013.
According to industry sources, the Samsung Galaxy S4, which is apparently codenamed 'Project J' and due for an April 2013 launch, sports a 5-inch full HD display, a 13MP camera and runs the latest version of Android -- perhaps Key Lime Pie.
Other speculation has suggested the device will be the first (or second) handset in history to feature eight cores.

2 Processors apparently. 1 Exynos 5 Quad and a weaker one for less intensive apps to save battery life.
Genetic mutation.
I am due for an update on my phone, so this might be it, if the battery life is good enough.
although I wish it was Mali T658
smart phone just use alot of juice, my galaxy nexus i love it but after a few hours of use is dead, but i got a 10,000 mAh battery pack and just carry around both so now i never run out of juice and just charge em both at night. i think we are years away from smart phones to have the battery life of the old cell phones
http://www.anandtech.com/show/6355/intels-haswell-architecture/2
That's a rendering, not how the phone will look like; same was used before the SGS3 launched, and nobody knew how the phone looked until launch conference.
Disappointed to see Tom's using the same rendering again and again without any proof, thus feeding assumptions.
Well then it's not octo core.
I hope it's not a T-604, but I wouldn't be surprised if Samsung went with that GPU for cost reasons. I really hope it's a PowerVR SGX544MP3, or at least a Mali T-628. It won't be a SGX554MPx, or a T-678 because both of those chips are geared towards tablets.