Platinumxii

Update: I tweaked my NVIDIA Control Panel settings as I had done some researching. It seems that GTA IV is badly optimized and I had to turn off "Anti-Aliasing" manually from the panel, manually select the PhysX Processor. I had also did a small fix by re-installing my Graphic Drivers via "Driver Fusion" and am I glad to say, the spikes seem to had decreased dramatically and also running on High Settings including ENSB's AA mod. Spikes still exists but not as much as before. Playable but still not satisfied. Thanks for the info! I had just did that but that still doesn't eliminate the spikes.

I installed GTA IV on my desktop and it runs fine, getting bout 60~70 FPS on maximum settings. I also installed it on my Laptop and had gotten FPS ranging from 50~60 and at times, 90~110 on indoor cutscenes. What really got on my nerves is that though I can play GTA IV on my laptop just fine with decent FPS, smooth gameplay but it suffers from lag spikes every few seconds. Anyone could enlighten me on why does this happen? If it weren't for the spikes, I'm able to get 50~60 FPS with extremely smooth gameplay. It's just the spikes. I had also done some searching around the Support Section of the forum and found certain tips and tweaks but these are just for low-end computers and nothing to do with spikes no? ASUS VX7 Lamborghini Laptop OS : Windows 7 Home Premium 64-bit Processor : Intel® Core i7-2630QM CPU @ 2.00GHz (8 CPUs), ~2.0GHz Memory: 2048MB RAM Available OS Memory: 2026MB RAM Page File: 1717MB used, 2333MB available DirectX : DIrectX 11 Graphic Card : NVIDIA GeForce GTX 460M Display Memory: 3776 MB Dedicated Memory: 3019 MB Shared Memory: 756 MB Current Mode: 1920 x 1080 (32 bit) (60Hz) Sound & Graphic Drivers are up-to-date. On a side note, I heard that there's a way to allocate available page file into RAM?