As far as microsoft are concerned simply opening the casing voids the warranty (they have a security sticker on the front), so either option will void it. However if you wanted to update the softmod firmware, you have to open your case + your pc every time, whereas most modchips come with...
Hi Guest we just wanted to alert you to a major change in the forum. We will no longer be allowing the posting of outgoing links. Please use the attachment feature to attach media to your posts.