Some queries regarding SGX

Researched SGX but I am mostly confused as to what it is.

I have some queries regarding SGX I’m hoping intelligent folks here would help me understand it

I get that SGX is a TEE

Can someone help me understand how does the SGX work?

I read it provides hardware security

My perception of SGX is that it is some sort of a sandbox insulated from OS and other apps.

Where does SGX reside? on the RAM ? or on the CPU?

How is it that it acts as a secure TEE while a normal computer doesn’t?

Can SGX be integrated into older Intel processors?(pre-SGX generation). Say the nodes use non-SGX processors, won’t they disqualify to run as node for enigma network?

Some of the questions might sound stupid, I apologize for it in advance. But I’ll really be grateful if you help me understand it.

Have you seen this thread? Critiques on TEE

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If you have more basic questions about SGX, Intel’s documentation may also be able to help you. https://software.intel.com/en-us/sgx/details

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read it just now.

Thanks.