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Netyaroze on 18 November 2009
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Hmm I honestly dont know a Quad CPU which can be used in an extremly portable device. Is there a Small QuadCore CPU ? Do you know a Quad CpU which can be used without a cooling device ?

The only chance to make a QuadCore CPU work in a PSP2 is to make it significantly weaker then all the Quad Core CPUs out there. And to completly alter the design so it dont needs an active cooling System. I didnt meant 4 Cores are always more power hungry. I meant--> 4 Cores always a very strong CPU with alot of Transistors and needs active cooling= Needs a strong battery. And where is the point to make a Quad CPU which has a small amount of Transistors which needs no active Coolement.


To implement strong CPUs you need always strong battery thats why a Mobile Phone has not 1 GHZ CPus. I think Apple made the maximum with the Iphone 3g S and 600 MHZ. Sony can reach probably 1Ghz and a Quad CPU with 1Ghz is way to power hungry because it has more transistors then a 1ghz Single Core CPU. Why its sometimes the case that a Quad needs lesser power :

You can make a 1 GHZ single Cpu significantly smaller then a 1ghz Quad if both use the same manufactoring process. A Quad CPU has theoretically 4 times the power of the same CPU with the same ClockSpeed. In reality its more of 2.5-3 times. It has a lot more transistors then a single core CPU of the same Speed. Ofcourse a single CPU can use more power if its manufactured in an older process. Thats the trick the more transisors you can fit on the same ground the more power you have, despite that you have the same Power Consumption. You canhave double or tripple the amount of transistors and still you wont need more power then an old chip.Its not just the number of transistors its also the manufacturing process. Thats why a single CPU can use as much Power as a Quad Core.

You could make a quad which uses lesser power but you have to reduce the Clockspeed. Its not that easy.

If you are a Company which produces Consoles you always take the smallest possible chip size I guess that will be 32 nm in the PSP 2. Smaller Chips = cheaper. It would be sensless to think about making a Single 1ghz in 90Nm or instead a Quad 1Ghz in 32 nm both would probably use the same amount of energy.

A Quad needs (depending on chip size) a lot more power then the same CPU manufactured the same way. Because a quad is nothing else then a bunch of CPUs taped together. And if the Quad is manufactured with the same transistor size the single chip, it needs a lot more space and a lot more power.