Thanks for you excellent explenation (as usual!), will try it immediatly when i get home.
Mouse is very important,isn't it?
… except for the way it frequently just hangs in the middle of a firefight and you are left unable to fire or aim until it starts working again 
If you have a wireless mouse it could be your batteries. Also it might be that your surface is too reflective.
If you have a wireless mouse it could be your batteries. Also it might be that your surface is too reflective.[/quote]It’s not the batteries, and I think it’s highly unlikely to be the surface. (Bad surface wouldn’t stop the fire button working!)
Are you sure about that? It may have a higher resolution but Windows determines it’s “scan rate” or how many updates it sends to the game, not the mouse driver, and it’s therefore the same for all mice (even PS2 / USB mice are the same).
As I understand it, the higher your sensitivity, the less distance your mouse has to travel, and therefore the slower it moves. The slower it moves the lower it’s scan-rate falls and the less precise it becomes. Which is why low sensitivity is a good thing and preferred by all “pro-gamers” as it forces larger hand movements, faster mouse movements and greater precision due to more updates being sent to the game.
Of course I could be completely wrong on that point, hardware usually confuses the hell out of me. 
In windows XP you can onlyset the refresh rate for PS2 mice (Hardware > Mouse > Advanced Properties), so i dont think USB and PS2 are the same when it comes to refresh rates. I learned this from the aiming tutorial posted by pack above in this topic http://www.swertcw.com/default.php?c=download&p=comments&id=493
sorry i made a mistake,you guys right i have the mx 700, i bought the wireless mouse and keyboard combo but i also have the mx500…I also understand that the mx500 is a bit better but i prefer the mx700 i hate having wires everywhere between speakers, printers, cable wires im going nuts 
Pgh, try Kustom PC’s - there a shop in Ayr which sell lots of goodies, (including the 500 & 700), have very cheap delivery rates, and you usually get stuff in a day or two. Never had any bother from them and have bought lots from them
search for mouse acceleration on this forum and you will find a huge topic about it 
Well, the scanrate of the mousedriver and how often the mouse itself takes snapshots are two different things. The processer can make ‘mistakes’ when two images taken are to far apart (because you mouve your mouse too fast) so that the values the mouse reports back are not correct. Heck, bad mice might even think they’re moving to the left when you are moving it to the right because of this, I’ve seen is happen with a cheap optical no-brand mouse. If the mouse takes pictures more often, the distance between them is smaller.
You want your crosshairs to point exactly where you want them, not 2mm to the right, because that can be the difference between a headshot and a miss.
True. If that’s the case you should return it and get a new one. Everyone I know that uses a MX Mouse is very happy about it and doesn’t want to switch back.
So how do you test / adjust these things? My mouse uses a “resolution” of 200 (upped it from 100) which I take it is the number of times per second the optical sensor reports it’s position to the PC, but it has a “scan-rate” of 125hz max, which I assume means the application only gets a maximum 125 updates per second.
Firthermore, that “scan-rate” drops (to as low as single digits) the slower you move the mouse. That means when you’re making minute adjustments to your aim, the mouse is actually only sending very few updates of it’s position to the game.
Therefore, lower sensitivity = greater movement required = more updates sent to the game = more precise aim. Or at least that’s how I’ve always understood it. Is there anything else I can do to improve the precision of my mouse?
No, the ‘resolution’ is how detailed the pictures are that are taken, not how often updates are sent. 200dpi means that the sensor takes pictures with a resolution of 200 dots per inch. How often it takes these pictures is another thing, and how often the driver/Windows asks what the current position is, is yet ANOTHER thing, and that is the only thing you can change.
That test app is based on windows mouse events, and VERY inaccurate.
DOH! Well that makes sense. :bash: (told you hardware isn’t my thing!!)
So how do I can change it?
Control Panel -> Mouse -> Hardware Tab -> Properties -> Advanced Settings Tab
Here you can set the sample rate.
[quote=“Hydra”]
Control Panel -> Mouse -> Hardware Tab -> Properties -> Advanced Settings Tab
Here you can set the sample rate.[/quote]
Ah, that is what I’ve already upped to 200. I think I’ve managed to get myself completely confused here, thanks anyway. 
My Mouse
4 Years old, Color modified, on it’s second set of micro switches.
The plastic on the bottom around the optical sensor has ground down slightly with use and has increased the mouse’s responsiveness, one reason I don’t want to replace it.
I use default XP mouse settings and default ET sensitivity and acceleration.
That is true, low sensitivity will give you more precision. But on the other hand, high sensitivity will make your mousemovement faster, because the hand needs less travelling.
In a fast paced game like ET, where you need to make big turns all the time and lots of 180° turns and close combat fights, I prefer high sensitivity, while in a ‘camp game’ like CS, where small but precise moves are necessary, low sens will be better.
To figure out a good sens, my suggestion is to find one which allows you to make all kinds of turns, and where you don’t need to lift your hand and mouse up all the time to reposition your mouse in the center of your mousepad. And you should offcourse still be able to aim precise. :moo: