# My Hashrate drops from 270.000 Sols, to 40.000 Sols? **URL:** \ **Category:** Mining\ **Created:** [July 24, 2017, 11:40am UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630 "2017-07-24T11:40:10Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![AngeloNielsen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@AngeloNielsen](https://forum.zcashcommunity.com/u/AngeloNielsen)\ **Post date:** [July 24, 2017, 11:40am UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/1 "2017-07-24T11:40:10Z")
Hello, i’ve begun mining, and i build a small cheap rig with a Powercolor Radeon HD 7970, which i just use for 24/7 ZCash mining via NiceHash. But the problem is, that when i begin mining, it all seems fine, it tells me i get 270.000 sols, and im earning a stable 1,3$ a day, but then suddenly after a few minutes it drops to 40.000 sols? I’ve also discovered that my Core Clock and Memory Clock decreases from (Core Clock 925Mhz and Memory Clock 1375Mhz) To (Core Clock 500Mhz and Memory Clock 150Mhz) Temporary fix for this currently is rebooting the PC, but the same problem then occurs a few minutes after! Im really confused why this is happendning, and i really wanna get it fixed since it has a major impact on the income of my miner. ---
**Author:** ![AngeloNielsen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@AngeloNielsen](https://forum.zcashcommunity.com/u/AngeloNielsen)\ **Post date:** [July 24, 2017, 1:24pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/2 "2017-07-24T13:24:18Z")
Please somebody help me ☹ ---
**Author:** ![jinsu](https://avatars.discourse-cdn.com/v4/letter/j/45deac/32.png) [@jinsu](https://forum.zcashcommunity.com/u/jinsu)\ **Post date:** [July 24, 2017, 1:43pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/3 "2017-07-24T13:43:11Z")
I would suggest to use another miner, e.g. Claymore, and check, how the card performs here… I do not know, what the 7970 delivers in average, but according to various sites, it could be up 290-300 H/s. According to your description, it also sounds, as if the card powers down automaticall (Heat?), this might also be an issue. ---
**Author:** ![AngeloNielsen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@AngeloNielsen](https://forum.zcashcommunity.com/u/AngeloNielsen)\ **Post date:** [July 24, 2017, 2:15pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/4 "2017-07-24T14:15:27Z")
I am already using Claymore\_ZCash miner ☹ And Yes around 290-300 H/s And what do you mean by “Powers Down Automaticall Heat?” ---
**Author:** ![Blue](https://avatars.discourse-cdn.com/v4/letter/b/3bc359/32.png) [@Blue](https://forum.zcashcommunity.com/u/Blue)\ **Post date:** [July 24, 2017, 3:51pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/5 "2017-07-24T15:51:39Z")
@jinsu means your GPU could be heat throttling which means it is getting too hot and is consuming less electricity so that it can cool off. ---
**Author:** ![AngeloNielsen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@AngeloNielsen](https://forum.zcashcommunity.com/u/AngeloNielsen)\ **Post date:** [July 24, 2017, 4:31pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/6 "2017-07-24T16:31:09Z")
No it doesnt seem to Throttle nor. overheat. It’s at a stable 70 Degress Celcius and 85% Fan speed, and then suddenly i get alot of “GPU 0# RETURNED INCORRECT DATA” and suddenly the hashrate falls to 0 H/s, and then the miner restarts and my clocks are Core 500mhz and Memory 150mhz. ---
**Author:** ![jinsu](https://avatars.discourse-cdn.com/v4/letter/j/45deac/32.png) [@jinsu](https://forum.zcashcommunity.com/u/jinsu)\ **Post date:** [July 24, 2017, 7:23pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/7 "2017-07-24T19:23:35Z")
Reducing the intensity could solve the problem. Take a look into this thread, especially this post: > [@How to fix "GPU #0 returned incorrect data!" R9 280X?](https://forum.zcashcommunity.com/t/how-to-fix-gpu-0-returned-incorrect-data-r9-280x/13337/6): > > had that issue also with some R9 280x vapor-x cards, latest claymore is really pushing the cards. When you see errors, try setting : -i 8 -cclock 1080 -mclock 1500 -tt 75 The sols are almost the same, and the cards that had these issues look stable Only had 2 cards from the 16 that had these issues. ---
**Author:** ![AngeloNielsen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@AngeloNielsen](https://forum.zcashcommunity.com/u/AngeloNielsen)\ **Post date:** [July 24, 2017, 10:22pm UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/8 "2017-07-24T22:22:05Z")
Thanks, i’ve read the comments in there and i’ve lowered the intensity to about the half of my previous, and it seems to have been running smoothly the past hours now, ill sleep over it and write about the progress tommorow. ---
**Author:** ![project](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/project/32/4959_2.png) [@project](https://forum.zcashcommunity.com/u/project)\ **Post date:** [July 25, 2017, 9:44am UTC](https://forum.zcashcommunity.com/t/my-hashrate-drops-from-270-000-sols-to-40-000-sols/19630/9 "2017-07-25T09:44:31Z")
Also you can try setting this setting to maximum performance ![](https://global.discourse-cdn.com/zcash/original/2X/1/1fc534daaffff908c6c6fc5d0b731e9110bb78dd.PNG)