TL;DR Razer has a better(EU) version of this mouse previously available for US.
Im going to return this mouse just because of scroll up noise issue. It’s loud as hell but caption this: The first viper 8k i bought in April 2023 has serial number RC-03050100-0000 and made in Thailand marked as UK/CA Europe version - it has no scroll issue at all. The second one i bought days ago from the same razer amazon store has serial number RC30-030501 made in China no region specified and has a scroll up loud as hell. I see there’s a lot of threads regarding this issue and razer support only states that “Not every product is 100% perfect.”. So what im going to do is to return this mouse and get a new one as long as it takes to get a version without this issue at all. I got two the same but completely different versions at the same time and i fill like razer is trying to make the production as cheap as possible. Im not going to fix it myself (guides are at youtube is presented) because i can see the difference between them, so i will make it your headache.
UK/CA Europe mouse bought in April 2023 from razer amazon store.
![](https://uploads-us-west-2.insided.com/razer-us/attachment/ede01d0a-5147-48ac-9ea4-413e72cd4f51.jpg)
Unknown region mouse bought days ago from now from razer amazon store and with scroll loud as hell.
![](https://uploads-us-west-2.insided.com/razer-us/attachment/40c0fa1c-2afd-4d68-942d-e57288791ea0.jpg)
P.S. If this topic is going to be deleted im going to make a youtube vid about this with the screenshots of this thread. If you once sold the better version of product - don’t try to make cheap version of it and sell if as it the same.