RalphFox

I have that same setup. Here is what i did: (Probably you are using java 64 bit) -Right click the nvidia tray icon(or open nvidia control panel) -Manage 3d settings -Click on ADD -Navigate to your java folder: --Go to program files in your c: drive --Go to java folder --Go to bin --Select the javaw.exe file -After this, change the "preferred graphics processor" to high performance nvidia -Click apply Have fun.

Good, that's the best solution to do. I tried to keep my last world by deleting the wireless stuff, but it seems that there was something else running amok. I need to use a ssh tunnel due to a bad quality connection of my ISP, so i use proxify. while on a normal world without any tekkit stuff, used at most 40MB of bandwidth, at this world that had multiple issues with wireless, i had used 1178MB of traffic. in an hour. No apparent errors or any log. Also, as said by Gigeran, my server was using 1072MB of RAM. after removing this world altogether it uses at most 400MB. (according to mcmyadmin) If there's any structure/home that you would like to pass to the other world, i'd suggest worldedit, its //hpos1 + //hpos2 + //copy + //paste work wonders. There's also //undo if you do anything wrong (like inverting the pos1 and pos2 and pasting the structure through the ground) #EDIT maybe the other issue was also with the pipe tethers that gigeran said too. i really liked those wireless liquid/item transmission, but there must be some memory leakage yet.

Found the problem again. Multiverse is breaking the wireless receiver configuration. After i created my worlds, did a bit of messing with the server configuration (changed the main world from world to world2). After that, my world1 was very slow(and server using almost 100% CPU). checked the log, getting spammed with NULL RECEIVER. Checked my nuclear central, the reactor was kaput. Patiently went to turn all the wireless stuff off, making the map a bit faster again. Will delete(break the blocks) all wireless stuff, re-make the fresh install, create/import maps, restart, and then place the wireless stuff. Then leave all wireless system on, and then restart. After that will tp to another world, then reset, then back to the wireless world, then reset, then check if everything OK. Edit: Did not work. I dont know if it would work with some fresh new map.(2 at least, because with one only in multiverse, it was working fine until i imported another map.) Will replace all transmitters/receivers with bundled/jacketed cables. at least one of these can transmit up to 16 colors of wire crammed into one.(yes, 16 signals of redstone through one cable)

Hmm, i remember correcting their position once after converting the worlds... i followed those steps here for world conversion: http://forums.technicpack.net/index.php/topic,11617.0.html [hmmm strange, it looks like the link doesnt work anymore? ] Ah, found a equivalent(/the same?) http://forums.technicpack.net/threads/so-you-want-to-convert-your-world-to-tekkit-3-0.9492/ i did this first from my steps when converting a world from minecraft 1.0/tekkit 2.0.x to 1.2.5/3.0.x By the way, watch out for plugins that are for 1.0 only; you must get their current equivalent version for 1.2.5 .

I was getting this problem too. Also, my file log was getting spammed with "Null Receiver". I was able to solve it by backing up the worlds, plugins(only the .jars), and making a fresh install(unzip the 3.0.4)(DONT forget to backup any other configs for plugins/mods!). And before "starting the server for the first time" [i dunno if this solved the problem, but] I downloaded https://d186ocprvpb7jc.cloudfront.net/mods/redpower-all-2.0p5b2-mcpc1.2.5-r3.zip (3.0.4 has the r2 version), placed it in mods/ , deleted the old r2. ( or http://minecraft.maeyanie.com/ , scroll to red power) Then i started the server, and voila, no "Null Receiver", and the receivers worked.(Yes, i restarted, stopped, and started again to be sure.) Other funny thing is that before making this "clean" install, my server was using 750MB of RAM, now it is using only 370. Yay! Ah about the machines position: My solar arrays were also strange, but after this fresh install everything has been corrected.