Low clock speed a challenge for PS4 development too (Project CARS dev)

[Scoobes]

curl-6 said:

Pemalite said:

curl-6 said:

RenCutypoison said:
Great article, but multi threading difficulties are no news. Time for devs to start optimizingg (Remember johnattan blow)

This is the first I've heard of devs have difficulties with PS4's clock speed, so unless I missed something, it's news in that sense.

It was foreseeable though, given the issues Wii U had with the same problem, and the lower clock speeds of PS4/Xbone compared to PS3/360.

The CPU clockspeed isn't actually the problem.
It's the IPC or Instructions Per Clock, Jaguar falls flat on it's face in that regard.
For example... Jaguar might be able to execute 1 instruction per mhz, where-as AMD's Trinity might be able to execute 4 instructions per mhz, thus at the same "mhz/ghz" rating, Trinity would be 4x as fast. (This is why the Pentium 4/D fell on it's face.)

Jaguar does only 1 IPC? I was unaware of this. So they rely on a higher core count in the same way PS3/360 relied on high clock speed?

Also, didn't the guy who hacked Wii U and revealed its clockspeed say it did 2 or 3 IPC? (Though it has only three cores)

I think those numbers were simply for example. I don't know anywhere that's actually revealed numbers for average IPC of the Jaguar cores but I've read it's up to 22% higher than Bobcat.