GTA4 strange FPS problem

[Realazio]

My frend yesterday got a new graphic card...gigabayte HD5850 OC 1GB and he overclocked it to GPU 905, MEM 1190 and is stable...

 

Before that graphic he got a HD 4650 1GB GPU 700, MEM 490

 

Rest of config:

 

Intel Pentium Dual Core E5400 2.7 default (3.2 overclocked)

2×2 GB DDR2 Dual Channel APPACHE

2×ATA(7200) HDD

Mobo: GA-G31M-ES2L (rev. 2.3) FSB 1333/1600

 

GTA4 Patch 4

 

The problem:

 

Before the new graphic the game worked but with lag...on benchmark showed 33 FPS-s on Auto Configure

 

With new graphic on benchmark shows 45 FPS with the highest possible settings, and the same with the lowest, logic??

 

Ingame he get the same FPS on lowest and highest settings around 20-25 what is too low for that kind of graphic.

 

At first we thinked that ATA HDD is doing problem, after some research HDD is not the problem, FSB is ok, but CPU...hm, looks like he needs a quad or something...becouse the graphic is capable of runing GTA4 on highest without problem but the FPS is the same when he seets GTA4 to Low settings.

 

Now we ask someone who have the same problem or meybe knows an answer to this other then buying a new quad core CPU...

 

Also we tryd with some commandlines as nomemrestrict, norestrictions, novblank, noprecache and we gained only 2 FPS in benchmark, ingame is still the same...

 

In benchmark the CPU is always at 95-98% withe memory and vid memory are around 70-80%

 

[mkey82]

You're CPU bottlenecked. The benchmark tool is broken and should be ignored.

[Realazio]

You're CPU bottlenecked. The benchmark tool is broken and should be ignored.

So a quad core is needed...damn...what a shame...this game needs so much power and gives small amount in return...

 

We tryd today Crysis 2 on his PC...is working like a charm on EXTREME/HARDCORE graphic settings...