In theory 6 cores are avalible, but as far as I know it is not possible to paralelize a code in a single process among more than once CPU (each console has 2 Jaguar CPUs with 4 cores each).

The solution would the creation of new process wich means that inter process communication. However, communication between two process requires a extra things, such as shared memory regions managed by the OS, resulting a lot of latency for system.

For instance: if you have a code that is not performing well, using the extra cores are not a option because your code may end up slower. However, it is possible to use the extra cores to perform other (indepent) tasks in parallel (like loading the next level of a game on the RAM).

P.S.: Sorry if my post was little bit too technical. =)

Not even close... internal are fast... and they are cheaper... the issue is that PS4/Xbone internal are 2.5" that are expensives.

20 is plenty. Just dlelteold games. Whyis this such an issue?

First of all, I'm pretty sure that the xbone uses sata II, which would be 3gb/s. Second, it's not that simple. A lot of SSD/HDD's have a higher data transfer rate in SATA III than SATAII. Also, I'm pretty sure the xbox one doesn't even support external drives yet either. And I'm pretty sure external drives can only store music and movies. So yeah, I'd rather be able to replace my HDD, which MS was to lazy to do with the xbone. 

Well... if the wiiU can let u store games on external hard drives upto 2 TB per hard drive... I am sure MS will let you and there are plenty of sites says that they will... And I highly doubt MS is using Sata 2 of all things considering that was released around 2003 and literily no motherboards even make sata 2 anymore... And I am well awear of the overhead of USB but I am also aware that USB 3.0 can achieve quite fast speeds... I get 90 MB/s on my western Digital external hard drive which is usb 3.0... Internal is better but external isn't so bad either... But with that being said... Since its not avaliable yet, Ps4 has the advantage

I do prefer external if its usb 3.0... Internal you can have upto 4 terabytes of space (if your lucky) but external, you can basically have 12TB of space no problem... And you don't have to really worry about replacing hard drives or etc...

Both uses SATA II... Xbone and PS4... there is no need of SATA III if only SSDs in RAID can use this bandwidth.

The latency of USB 3.0 is bad compared with internal SATA... the data needs a little more time to reach the memory... so even if the speed is close in theory (that it is not) to internal they will have issues.

My guesses MS is having trouble to make the games runs via USB with external HDDs... popup textures but of couse they will fix and release the feature when it is ready.

Just to give a example... GTAV already have issues with external HDD... it had with internal too but less than what it had with external.

Very...interesting. Thanks for the info. You did a good job eplaining it in laymans terms, so I think I get the gist of it.

Yeah you see the problem about that internal there is that it can't go into a PS4 anyway. I'd gladly wait to be able to add on that 3TB external.

The problem is, you dont even know if you'll be able to use it in the futur, words are just words at the moment for xbone.

But you cant wait as many time you want, you'll never  get the same quality with an external drive, there will always be latency, better to get a 2TB internal drive than an external drive if you plan to use it for games.

I would imagine the latency of an external could be somewhat minimised through the use of the 8GB SSD on the internal HDD.