A: ICERIVER doesn't offer any firmware to up grade KS3L to KS3M. Also, we strongly suggest in opposition to using 3rd-get together firmware or Manage boards that assure to increase the hash rate. A: Based on our conditions, after an order is placed, ICERIVER won't entertain partial or total refunds. https://iceriver-ks516048.webbuzzfeed.com/28239058/manual-article-review-is-required-for-this-article