...And now something about weird things on my GTX 570 and GTX 760 rigs:

GTX 570
- Most people claim that system RAM has little or no difference in hashrates, but I have suffered serious problems when i left just 2GB on mobo. These problems started immediately after cudaminer start, because the good-old config (posted in previous post) was NOT WORKING at all! F15x16 could be executed just to start the mining, but with "wrong detection" of over 600KH/s and errors on every single share ("not validated on CPU"). Auto config was giving different setups every time, rates dropped to ~200KH/s, and what is most interesting, auto config was reporting MAX WARPS: 171 (instead of 264 reported with 4GB of RAM)?! My rig was going too WILD and unpredictable for the stuff that is "not so much RAM dependent"!
- My max of ~255 KH/s can be achieved ONLY if browser (chrome in my case) is active BEFORE starting cudaminer.exe, and some page is opened (usually my pool page). After starting cudaminer, I can close everything and hashrate stays the same. Otherwise, same settings without browser give me only ~235 KH/s?!
- Some people were using Kepler kernels on Fermi devices (in previous versions of cudaminer), but at my place it was making a serious drop in KH/s
- Just to note... interactive mode (-i 1) is taking away 7-8KH/s on this rig

GTX 760
- As I mentioned before, auto never reaches the best manual config for me (and there is a better config than my current one for sure), and the auto option is changing config very often (I had like 3 different configs on 5 cudaminer restarts)?!
- This GPU (or whatever) is varying MUCH more in hashrates (160-177KH/s up-down most of the time), than GTX 570 which has pretty much "fixed" rates 252-255KH/s!

BOTH
- Is it possible that I NEVER get better hashrates on any config with 32bit vs 64bit? So many people (developer too) usually has better results with 32bit version, but I never even saw that for a second?! (not complaining, just asking...)