Hello Frankyli, 

Thank you for posting in Intel Ethernet Communities. 

请注意，我只能用英语支持你。我使用了网络翻译工具来翻译此响应，因此，可能会有一些不准确的翻译。

Here is your translated query in English. 

How to tell the difference between 210at and 210it

Please check the attached picture, Figure 1 Figure 3 is the same, Figure 2 is another, how to distinguish between true and false? Because counterfeit goods are rampant outside, if intel original factory can produce a certificate, how to distinguish between true and false, in order to help consumers protect their rights. Thank you very much. There are a lot of WGI210IT on the market

SLJXT is charged by WGI210AT SLJXR with a (I) word on the chip

210it sold, can only Intel original factory come forward, resist this behavior. Many of the changes on the market to WGI210AT are now changed

WGI210IT is on sale, the two IC functions the same, only the wide temperature this parameter is not the same, 210at

It is 0 degrees Celsius to 70 degrees Celsius and 210it is negative 40 degrees Celsius to 85 degrees Celsius. The appearance of the two ICs is the same size, there is only one (I) difference, so the criminals in the 210at IC marked with a (I) word as 210it to sell, the difference between the two ICs is quite large, the criminals in this way to seek huge profits. Whether Intel can provide channels, we check THE LOT to distinguish between true and false.

We'd like to inform you that we both have WGI210IT and WGI210AT. You may visit the links below for its specifications. 

Intel® Ethernet Controller I210-IT

https://ark.intel.com/content/www/us/en/ark/products/64402/intel-ethernet-controller-i210it.html

Intel® Ethernet Controller I210-AT

https://ark.intel.com/content/www/us/en/ark/products/64400/intel-ethernet-controller-i210at.html

Before we proceed checking your query with our engineers, please confirm if you wish to know how do you identify if the Ethernet Chip is a genuine Intel version or not?

Please also advise if there are other questions that you may want to raise so we can check as well.

Looking forward to your reply. 

We will follow up after 3 business days in case we don't hear from you. 

Best regards,

Crisselle C.

Intel® Customer Support