ViperatechReviews of viperatech.com

Vipera is my go-to vendor. The products are top-shelf and the service is excellent. A+ experience.

Update 2: Vipera credited $1,500 to the next order. I got a new tracking of the parts today (Apr 10) and it seems to be arriving this week. Update 1: Vipera agreed on $1,500 credit for the next purchase. There is a problem with the promo code they provided. Original Review: This review is for order #12992 brand new Bitmain Antminer 110t. I used $500 credit that I received from a previous order. I paid for a brand new price miner and received a used miner. I have been trying to resolve the issues with Vipera for over a month. They did not want to accept return/refund and kept twisting things around like a car salesman. I have been holding off writing a review, giving them enough chances. Viepra's dishonesty forced me to file an Amazon A-z claim and write this review. Vipera told me a few days after the order was placed that the brand new 110t was discontinued and would "upgrade" me to a cheaper 122t without refunding the difference. Even though the 122t is newer and more powerful, I refused it because the 122t's voltage is not compatible with my electricity. I asked them to cancel the order and refund. Vipera insisted that they would sort out a new 110t for me. At that time, there was refurbished 110t miners came out to the market. I asked them what they were sending. They confirmed that the one on the way was a brand new one. After waiting for 3 weeks, a badly used miner arrived. The shipping box had no Bitmain tape on it. I was shocked when I opened and tested it. The PSU is rusted everywhere that they had to sand it out. The SD card slot does not work. And, the worst was the longer shell with a fake 110t serial number sticker. The shell is an inch longer than the normal 110t and it wouldn't fit on my cooling rack. The miner is sitting there doing nothing for weeks while resolving issues with Viepra. I have lost the opportunity to mine for several hundred dollars. The used miner probably costs no more than $1,700 and I paid $3,200 for it -- a $1,500 difference. After letting Vipera know about the defects, they said they would send parts (I had to replace them myself). I did not get a confirmation of what they would send or any tracking number. There was no response from Vipera when I asked if they would send a replacement PSU. I had to go through Amazon to get a reply from them. On March 28, they said, "A new PSU, control board and shell has already been dispatched to you". Today, March 30, they gave me a DHL tracking. The tracking status is just "Shipment information received on March 30". I asked Vipera many times for a return/refund. I'm not going to pay a brand new price for a used miner even if everything is working with 1 year warranty. This used miner is about 2-3 years old and probably has only 1-2 years of life left. I still have to spend hours replacing and troubleshooting the broken parts. I gave them another option for a credit to keep the used miner and I would continue to do business with them with 2 more miners (brand new different model), but no response from Viepra. They only replied after I filed an A-z Amazon claim. They offered $1,000 credit, which means I would be paying $2,200 for a used machine and I have to buy more miners at full price in order to use the credit. I told them I wouldn't buy a used one for more than $1,800. If Viepra thinks the used machine is worth more than that, by all means, please take it and give me a refund. Today, they sent me another email asking me to withdraw the claim. They insisted on giving me $1,000 credit and told me that the cost of the parts plus shipping is $703 as if the parts were brand new and I was responsible for the defects. I'm pretty sure the parts they are sending are used and cost them almost nothing except the shipping, and I'm obviously not going to be responsible for them. I might as well claim a thousand dollars on the replacing parts labor and loss of mining opportunity. I own a business and the last thing I want to do is to ruin a business with a negative review. But I have spent enough time trying to resolve issues with them. All I got was shady car salesman bait-and-switch responses from Vipera.

good service today. Ansen is a credit you your organization.

Sabrina Monti was super helpful! Quick to respond and kept me updated while giving me 3 options to pay with credit card, bank transfer or bitcoin. Great service thank you for my 2 K7’s. I look forward to doing business again.

The sales process was fantastic. Contract was fair and price was good as well. Overal a very good experience. The deliver process wasn't so good. But it all worked out at the end.

Fair shipping times, good support.

Great service, received my ASIC in perfect condition and was able to pay by CC...good pricing on many items!

Prices good. Shipped to canada. Wanted a D7, didn't get for 2 months, ended up with a bitcoin miner.