Performance difference between PD805 and 945?

[greatromances]

Hey all. I'm going to be building a C2D system a little after Christmas, but until then I decided to upgrade my Pendium D 805 to a 945. It should be coming in the mail today .. Right now i'm running my 805 at 3.46ghz with 2gb DDR2 667 and an X1800XT (665/765), but my performance isn't where I want it to be with gaming, at least until I get the C2D system running. I can't get much higher than 3.46 on the 805 before I start running into some throttling issues, specifically when i'm running F.E.A.R and Oblivion. I get small glitches and studdering at times, and after upgrading from 1gb of ram I thought that would take care of it. So my question is, how much of a performance difference will I be looking at with the 945 compared with the 805? I'm hoping I can push it up to 4ghz (on a freezer 7 pro) which I assume would take out most of the studder in F.E.A.R, and up the frame rate noticably correct? Also, how high do you think I could push the 945 on air? I've heard of people reaching 4.2ghz on air but that seems far fetched to me. Thanx guys.

 

[Snakexor]

depending on what res you are running at and what image options are on, it probably isnt your cpu. the 945 upgrade, imho, was stupid

 

[The-Noid]

945 C or D stepping will go 4.5-4.9 ghz pretty easily. It will be a start.

 

[greatromances]

Not necessarily stupid... I picked it up for $148 and if you asked me, that's a pretty cheap upgrade from the POS 805 i'm running. If I can get up to FX-60 speeds with a $150 chip to hold me over for my C2D, then I'm happy. 3.46ghz isn't the best performer, but if I can get a 945 past 4ghz then I think it's justifiable for the price, at least for now. 4.5-4.9ghz on air?!? As for the res and img quality, i'm running at 1680x1050 with max details and 4x/8x (no soft shodows) for fear and 1280x1024 medium with oblivion. Oblivion actually runs perfect at those settings, i'm getting most of the studdering in fear. Also, will I be able to use my freezer 7 pro on the C2D, or should I look into another HSF? I would have thought to get over 3.46ghz with the 805 with the freezer 7 pro, but I guess it's not the best HSF for this chip... Any suggestions on a better HSF.