Hi everyone

[ucaboys]

this doesn't have an impact performance-wise, but only on the stability and correct functionality of the vmu and console. if you use a normal vmu in an overclocked dc, stuff like bad memory savings and loadings can happen. correct me uca, should i be wrong

Xiaopang is right, if you overclock your DC and you don't change your VMU - then you're very likely to get corrupted saves and loads.
Basically you want the data bus on both ends to work at the same frequency. By the way most people like to try to push their DC to 240 MHz, but some hve been know to exceed the 300MHz mark.

[darkNiGHTS]

How do you overclock a VMU?  I might try and overclock my DC sometime, but I heard about it messing up VMU saving.

[ucaboys]

The nominal speed for the VMU is 6 MHz
If you overclock your DC from 200 MHz to 220MHz ( a 10% increase ) you need to modify the VMU clock to 6.6 MHz (a 10% increase) so that the ratio stays the same. The crystal that controls the VMU Clock is on the backside - with the speaker.

[willplayer]

how hot do you think it'd get if you overclocked it to said 300mhz?

[SKullinator]

Id be carful overclocking the DC, I know of people who tipped the glass too far and it overheated and died.  but however i do know that some people also install switches so they can flick back and forward between 200 mhz and the OC'd speed. like this guy http://www.dreamcast-scene.com/index.php/Main/Overclocking , apparently some games dont like the Oc'd speed so the switch would be useful.  If I could find the right oscillator, I'd give it a try.

[darkNiGHTS]

Yeah, I think I'm only going to try it to 220mhz or 240mhz, nothing more.

[willplayer]

this kind of excites me, this overclocking idea ... can an NES be overclocked and would it really make a big difference? I know Sega Genesis' can be oc'd.

[ucaboys]

Yes - you can OC a NES - not too much of a problem. You don't even have to add extra cooling to it - after the modd.

ucaboys

[willplayer]

I should look that up does it really affect the performance any?

[darkNiGHTS]

If I am correct, it will speed up gameplay, and if you underclock it, it will slow it down.  I saw a video on youtube of someone overclocking and underclocking the Nintendo DS and it sped up and slowed down gameplay.  Overclocking systems like the Dreamcast, will get rid of lag on many games, and make some homebrew apps run slightly faster.