http://www.youtube.com/watch?v=RyFmxNLH0YA

First up is the PS4 CPU

For comparison the PS3 uses a cell based processor with 1 PPE (Power processing element) @ 3.2 GHz which is dual thread i.e. capable of processing 2 streams of instructions at a time and 8 SPEs (Synergistic Processing Elements) @ 3.2GHz of which 1 is disabled for yield purposes and 1 is reserved for security purposes such as encryption and decryption of the hard drive in real time. The cell in the PS3 has an overall performance of 204 GFLOPs.

Sony had invested hundreds of hundreds of millions of dollars in to the development of the Cell Processor and on building fabrication factories (of which cost over $500,000,000 each!), all that money would go to waste if Sony chooses not to include a Cell processor in their next console.

I believe that Sony will add more SPEs to have an overall amount of 16 SPEs as this has an optimal power to heat ratio if manufactured at 32nm. It should consume the same amount of energy as the 90nm Cell processor found in the 60/20Gb PS3s. 1 will be disabled for yield purposes and 1 will be reserved for security purposes. If this cell processor is made then it should start at 32nm as Sony are already at work shrinking the PS3's cell to 32nm. At 32nm they could double the local store for each SPE to 512KiB which will add much more performance for games.

Clock speed could increase to up to 3.8GHz, however with the improved performance of the new cell and the amount of SPEs this is unneeded and will create too much heat. I can only see an increase in clock speed if fabrication starts at 22nm as this will help reduce the heat created. 22nm processors are expected to be released in 2011 so by the time the PS4 comes out this would be the norm, so 22nm is a feasible starting fabrication. This will make it have an overall performance of around 500 GFLOPs for the whole Cell Processor at 3.2GHz.

Second up is the PS4 GPU

This is where it gets a bit tricky as I am just going to base my prediction on a product that hasn't been released yet. However I do believe that since the PS4 is a “closed” system and that the cell can do some graphical processing that a relatively moderate GPU can be used in the PS4. For comparison the PS3 uses the Reality Synthesizer developed by Nvidia, clocked at 550MHz with 256Mb of GDDR3 clocked at 700MHz.

So if Sony is going to continue with stereoscopic 3D then that will rule out any ATI 5000 series cards and below and I do believe that Sony will stick with Nvidia anyway since they have a good relationship. The PS4 will need to be able to support 1080p 3D @ 60 FPS per eye so it has to have enough VRAM.

The Nvidia GeForce GTX 560 (due to be released in 2011) fits the bill perfectly. A 256 bit bus so that it can communicate with the cell fast enough, a 820MHz core clock speed, 1Gb of VRAM clocked @ 1GHz (4GHz effective speed). All of which if utilised properly could do 1080p @ 120 FPS and most importantly unified shader cores means more polygons, higher resolution textures and better effects.

Thirdly the main PS4 system RAM.
For comparison the PS3 has 256Mb of XDR RAM clocked at an amazing 3.2GHz (Super fast!!!!! :o). The next obvious step would to include 1Gb of XDR however XDR2 has been released since that time with many improvements such as a bandwidth increase and reduced latency (even though it was low to begin with). XDR2 operates at double the CPU speed, so 6.4GHz to 7.6GHz is expected even though it can operate at up to 8GHz!

More than 1Gb isn't needed since there is a lot more VRAM this time, therefore there will be a more efficient use of the main RAM this time for other tasks for example watching a video, looking at pictures, going to the playstation store all while in a game.

Blu-ray or HVD ?

Many people have been saying that the next logical step for Sony is to ditch blu-ray and go with HVD. HVD drives are just too expensive (a few thousand dollars) and too big.

Sony spent a lot of money on developing blu-ray, why would they ditch it? Its wasteful and the fact that not a single developer has created a game that uses a full 50gb dual layer blu-ray disc yet makes the extra space useless. And with a 100gb quad layer disc in development who needs HVD anyway?

Anyway to use the 100Gb disc you'll need a better blu-ray drive with faster reading speeds. The PS3 has a 2x blu-ray disc, 4x is the minimum to read a 100Gb disc. However the average read speed nowadays is 8x and it is relatively cheap, so I expect the PS4 to have at least a 8x drive which reads at 36Mb/s, so games should load much faste

Hard drive or SSD ?

SSDs are still to expensive to even be considered for a games console, so I expect spinning drives to stay with similar sizes of today’s PS3s . I'm not sure if Sony will change the SATA port to SATA 2 or 3 considering hard drives still don’t reach the SATA 1 limit of 150 Mb/s.

Lastly PS4 USB connections

2 to 4 USB 3.0 connections are to be expected. Anyone who has ever done a full back-up of your PS3 would be grateful for USB 3 connections as backing up 100Gbs of install data, applications and save data can take about 8 hours, with USB 3 this should be halved.

Posted by Henry, you may recognize my user name from the PS4 Forums. I have written an article for all of you about what I believe could* be the the specification of the Playstation 4.

*Disclaimer: This article is speculation only, however I have based this article on facts and figures to make as accurate an assumption as I possibly can. Any similarities with the Playstation 4 (in the event of Sony releasing the specifications of the Playstation 4) is purely coincidental. Enjoy and if you have any questions please leave a message below or message me in the PS4 Forums (registration is free). This article will be updated periodically with the latest information available to us.