Gran Turismo 4 framerate problem

[willkuer]

What happens if you set skipdraw: 1-10 in gsdx hw hacks?

[ThEoUtCaSt]

My specs:
AMD FX-8320

If you have any solution, tell me

The problem is your CPU, especially if you aren't over-clocking it.

You really need it to be running at a minimum 4.5GHz to stand a chance of having a consistent frame rate in the GT games.

Don't get me wrong, in a lot of games the 8320 is enough for 60fps 100% of the time, unfortunately for you, GT 4 isn't one of them.

[PlaysGames11]

lol I overclocked it at 4.3 GHz and my CPU i not the problem, trust me
It does not fully uses my CPU (20-25%) and sometimes, in some races, I got 100% EE usage (35-40% CPU usage)

[Nobbs66]

are you using an speedhacks?

[PlaysGames11]

Yes i'm using speedhacks, see one of my posts to see that disabling speedhacks does not affect anything

[ThEoUtCaSt]

my CPU i not the problem, trust me

..trust me, it is.

..and I said it needs to be running at a 'MINIMUM' 4.5Ghz, the closer you can get to 5GHZ with FX processors the closer you'll be to 60fps 100% of the time in PCSX2 and GT 4.

My 4690K @ 4.5Ghz is equivalent to an 8320 running at ~6Ghz, and is only just capable of keeping 60fps in GT 4 all the time, although that's at 3x native resolution.

[PlaysGames11]

well, this is not resolving my problem. Why can't I reach 100% EE or GS with framerate drops while playing ? If I had 100% on a component I would understant but in this case, I don't...

[jesalvein]

well, this is not resolving my problem. Why can't I reach 100% EE or GS with framerate drops while playing ? If I had 100% on a component I would understant but in this case, I don't...

could it some 3rd party software eating your resources ?

[markyrocks69]

Only thing I can say about as far as cpu clock speed and the fact that the op cpu isn't bottle necking is that the clock speed is still important factor even if no cores are being used at 100% the load is spread out over multiple cores so instead of 2 or 3 cores being maxed and the rest sitting idle. That's all well and good it helps speed for the most part but the bottle neck happens when you have calculations sent to cpu core b that can't be executed until cpu core a finishes a calculation bc a value is needed by core b that is the outcome of core a so in that sense it's actually slower than the single threaded performance of the chip bc after core a completes the calculation it has to then be sent over to core b which was just kinda zoning out waiting for the value. So the frequency of the cpu is the number of clock cycles per second so dividing The frequency into 1 tells the length of time it takes for one calculation to be done the higher the frequency the less time one calculation takes therefore that 1/10th of a second frame rate drop might become barely noticeable or even nonexistent the higher the frequency. But we all know that amd cpu frequency numbers are basically just decoration on the box it comes in bc there architecture just isn't optimized.

Now some of the stuff I said in this post may not be 100% accurate but I'm on a 500 mile road trip been in a car for 7 hours and I'm tired so it's affecting me.

[markyrocks69]

O and the only reason I'm thinking about this stuff in such detail is bc I'm experiencing similar issues with gt3 and also my system doesn't appear to have any bottle necks. Something else that just occurred to me in the vein of cores waiting for other cores to complete calculations and sitting idle for a fraction of a second may explain why seemingly every time I experience a frame rate drop my cpu usage also drops along with the temperature bc there waiting and that Wait time plus light load may evoke speed stepping and compound the problem