Hi,
Some of you would remember me from the old Mactalk days. Same Username 
I’'m looking to upgrade me Mac to some higher spec CPU’s but looking for reliable and legit sellers of old CPUs
Looking for a pair. Obviously for a MacPro
Cheers!
I bought my X5680s from an eBay seller in the UK.
These days most of the server pulls are coming out of China.
As long as you pay via PayPal I wouldn’t stress about it too much as if they’re dodgy/faulty you can make a claim.
Purchased from this US seller. Standard shipping takes about 30 days but prices are good and all works perfectly.
https://www.ebay.com/sch/friendlycomputersusa/m.html?_nkw=&_armrs=1&_ipg=&_from=
I generally buy CPUs from AliExpress. Haven’t had a bad one yet and cheap.
I ended up getting a couple of X5680’s from a seller in Melbourne. Slightly lower clock speed but also over 50% cheaper.
Now to find a bloody 3mm hex tool and debating if i should delid or not
Probably do that next if i upgrade again to the X5690s
I know a guy who does installs for me (for $150) that uses washers to space it - we’re talking Mac Pro 4,1 right? The 5,1 doesn’t need de-lidding.
He just installed a pair of X5677 (4 core 3.46Ghz) in a 4,1 this way for me. Got the pair of them off AliExpress including fast shipping for $95USD.
Update:
Armed with this Youtube video
I went to Bunnings to buy some razer blades, masking tape and a heat gun
Thought I had stuffed it big time on the 1st one as the razor blade got scorched, but both ended up worked flawlessly. Well as much as i can tell after 24 hours of use.
Very happy with the result Though not for the faint hearted!