Forgive me in advance... I suck at the Tube of You... First real gameplay video I've ever made, so cut me some slack
Quick video I made of the small lag spikes I am experiencing. I know a lot of people have been complaining of terrible, unplayable lag but I think it's client side. Other players are not stopped dead in their tracks, and neither am I...
Try to turn down your settings to a bare minimum and allocate more ram, 2G or more, to the Tekkit Client before you launch. (PC Upgrades wouldn't hurt either).
Tekkit can be a beast as far as minecraft goes simply due to all the additional blocks, calculations and other 'stuff' going on in the background. Hopefully with the new test server hardware going up we can get some improvements, and then finally when we port over to the production servers we will all be able to play. Until then please try to tweak your settings so you can login to test, build and help out.
Here are my basic PC Specs:
Tekkit Launcher - 4GB
Win7 64 bit - All drivers, java and other software updated regularly.
Intel i7 920 2.67GHz (OverClocked to 3.2GHz)
12GB DDR3 Ram (underclocked currently)
GTX 560Ti 1G
2 System drives:
-1 SolidState for the OS (load & reboots faster)
-1 HardDisk for apps and storage