aLkaLiNE said:
walsufnir said:
It isn't. Well, it is but not as reasonable speeds. You have to emulate 6 cell cores which match the six cores from the jaguar available on PS4. The Cell itself is still faster or let's say at the same speed. So emulation would have to 1:1 in terms of speed which is impossible. Than you have to emulate the PPC core on another core of the jaguar which is not even fast enough to emulate a cell core so the no time left would have to emulate the PPC core.
So just from the CPU point of view, it is not possible.
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To my knowledge GPGPU compute, a completely new feature exclusive to current gen and modern PC gaming is by design allowing your GPU to handle some of the processing tasks normally reserved for a CPU. Sony went ahead and made some modifications to their pictairn based AMD graphics card which even improve upon this. You and the other guy are looking at the clock speed on the Cell, seeing it has a higher number and thinking its instantly impossible but theres more to it than that. While the Jaguar might have a lower clock speed, it still has modern day features and is far more efficient on a relative scale. If they were able to match the Cell performance with just the cpu performance on the ps4 then BC would seem far more possible. Truthfully though, this is entirely conjecture. Unfortunately no one on here has proven that I'm wrong.
I really do think GPGPU would be key to PS3 emulation on PS4.
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GPUs are fast at calculations but not that good to replicate a data flow that happens on a CPU. CPUs do a lot more than just "add x to y and save it in z", especially memory operations and ram access is crucial.
The Jaguar of course is somewhat "modern" but it is still way too different to Cell than the Jaguar could handle it. You still would need several clock cycles to do what Cell does in some ops which immediately shows that the Jaguar isn't fast enough - it would need to do several Cell instructions in one instruction to make the clock speed difference irrelevant.
Whether you are proven wrong or right is of no use here. PS3 emulation won't happen on PS4. If you want to take a look at a PS3 emulator, look up for rpcs3. There are even videos out there of it running, many of them show the task-manager so you can see the load on the machine that is emulating. And you can see the machine specs that is emulating. It easily wipes the floor with the PS4 in terms of CPU.
