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GTA IV - EFLC issues *update huge fps increase!

post #1 of 23
Thread Starter 
GTA IV is poorly optimized i know... but which is the bottle neck here? I am using a AMD 955 OC to 4.0Ghz, HT link is at 2400mhz, 1600mhz RAM and my CPU hits %60 loads @ 43degrees during the game so im thinking its the not bottleneck...

Stock MSI GTX460 cyclone 768mb @ 728Mhz core 900Mhz memory and 1455Mhz shader @ 42 degrees under load

OC @ 911mhz core 1050mhz memeory 1816 shader @ 55 degrees under load

In crysis this OC is the difference between playing gamer and enthusiast setting. Its so significant in every single game, this OC allows me to get LOWS of 60fps on BFBC2 1080p and highs of 80fps w/ fully maxed out settings including AA. This OC is giving me a truly significant increase of FPS of usually %30.

However in GTA IV EFLC this is giving me 0 fps increase!

So why is GTA IV EFLC not benefiting at all from this OC? I don't think my video memory is bottlenecking it because my keyboard saw a high of 715mb usage and i seen it go up to 738mb on crysis so i know it can use more. But even when GTA IV EFLC uses 528mb it still has the same fps!

Infact, only texture res setting and AA seems to affect fps. GTA EFLC wont let me max out everything because of Vram but i have everything max except....

shadows are @ high (very high makes no difference in fps anyway)
view distance @ 30/100 (game wont let me go higher, this does affect vram and fps)

35fps to 45fps is very playable so im not concerned but why is the OC GPU not impacting FPS in anyway?

- edit - OC the cpu to 4.2ghz and 2800mhz CPU-NB (previously 4.0ghz and 2400mhz) this increased fps from 35-35fps to 45-60fps!
Edited by 2JZ - 5/16/11 at 4:58pm
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post #2 of 23
GTA relies mostly on your CPU. so overclocking your gpu to the max wont really do much.
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post #3 of 23
Your CPU should be getting 75-80% (roughly what I get) load as GTA IV will only use 3 cores. It just loves fast CPU's, its not too bad on video cards.
 
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post #4 of 23
Thread Starter 
isn't a 4.0ghz AMD 955 BE overkill or is my CPU being bottlenecked? I thought a 955 was wicked fast
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post #5 of 23
Check the options/benchmark, and see how much video card memory you're using. Because I know that 768 isn't enough to game properly on it.
    
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post #6 of 23
I upgraded from my 4890 to 6950 and only saw a 2-3 fps increase
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post #7 of 23
Quote:
Originally Posted by Mudfrog View Post
I upgraded from my 4890 to 6950 and only saw a 2-3 fps increase
Even more extreme, I saw a 7 FPS increase from a 8800GT to an HD5870 @960MHz.


Swapping from an Opteron X2 @3GHz w/ 2GB DDR2-946 to the X6 @3.6GHz and 4GB DDR3-1600 gave the possibility of going from 1280x1024 medium to 1920x1080 @maximum and actually seeing an FPS improvement.


Edit: Bump the NB to as close as 3GHz as possible whilst mantaining the HT Link as close as 2GHz as possible. You'll see a noticeable improvement in framerates.
   
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post #8 of 23
Yea I forgot to mention that OC'ng my cpu from 2.8 to 3.7 saw the largest increase in performance. It was something like a 15 fps increase.
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post #9 of 23
Thread Starter 
crap, i should of bought a 1090T or something then eh...
What does OC the HT link do exactly? Doesn't it aid the RAM?
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post #10 of 23
Thread Starter 
also, how does GTA IV react to mods? Are they built well and cause no fps impact ?
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