looking (chat) for my forums

[urstorm.com]

hi . i am looking for a chat for my forums , i used one before and its killed my vps (1gbRAM)
any boddy show me whare is the good one ? safe and fast and did not make my server acting down !
the one i used , is in Attachment , and its make my vps VERY slow and down some time ...
waiting another one beeing really good with server and sure safe ,


Edit by Lynne: Modification removed. You may link to the thread, but don't actually attach the modification to the post.

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any help ppl ?~!