# EWBF miner gpu0 low hashrate issue **URL:** \ **Category:** Mining\ **Created:** [September 2, 2017, 3:39pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092 "2017-09-02T15:39:03Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Keur](https://avatars.discourse-cdn.com/v4/letter/k/258eb7/32.png) [@Keur](https://forum.zcashcommunity.com/u/Keur)\ **Post date:** [September 2, 2017, 3:39pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/1 "2017-09-02T15:39:03Z")
Hello, so I have 5x 1080ti connected to biostar tb85 motherboard I have 2 gpus per 1x 1000w evga psu connected and I use powers 6-pin raisers. Problem which I have is that all the gpus give more than 700 sols/s only gpu0 gives 650 or less. I have windows 10, latest nvidia drivers and problems persists if I overclock or not, gpu0 just gives 60-70 less sol/s than the rest. Sometimes it starts OK and gives 700+ sol/s but then drops to 650 after a few minutes… Its frustrating, I changed raiser, cable, psu … nothing help…can anyone help? ---
**Author:** ![Uche32](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/uche32/32/11569_2.png) [@Uche32](https://forum.zcashcommunity.com/u/Uche32)\ **Post date:** [September 2, 2017, 4:46pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/2 "2017-09-02T16:46:12Z")
hi, sorry, you have 5 1080ti GPUs and 2 GPUS are connected to one 1000W PSU and the other 3 GPUs are taking their energy from god? first question is, are the GPUs all the same? ---
**Author:** ![Keur](https://avatars.discourse-cdn.com/v4/letter/k/258eb7/32.png) [@Keur](https://forum.zcashcommunity.com/u/Keur)\ **Post date:** [September 2, 2017, 5:09pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/3 "2017-09-02T17:09:25Z")
Hi ty for reply, yes the rest gpus are getting power straight from heaven. Sorry They are connected like this 2x 1080ti - 1x evga 1000w , 2X MSI aero 1080ti - 1x evga 1000w and 1x Asus 1080ti + system - thermolake 750w. Gpu0 is one MSI aero 1080ti, the other one works fine ---
**Author:** ![Kahooli](https://avatars.discourse-cdn.com/v4/letter/k/e79b87/32.png) [@Kahooli](https://forum.zcashcommunity.com/u/Kahooli)\ **Post date:** [September 2, 2017, 5:11pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/4 "2017-09-02T17:11:51Z")
You can always shuffle the cards. if its always Gpu0, regardless of which physical card is in that slot, it’s probably system usage of gpu0. That is the one you have connected to a monitor/display yes? ---
**Author:** ![Keur](https://avatars.discourse-cdn.com/v4/letter/k/258eb7/32.png) [@Keur](https://forum.zcashcommunity.com/u/Keur)\ **Post date:** [September 2, 2017, 5:19pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/5 "2017-09-02T17:19:23Z")
Oh and one more thing, when I mine LBC with cc miner all cards performe relativley the same, so no issue there… yes I have monitor plugged in gpu0 and if I disconnect it, nothing changes… ---
**Author:** ![Uche32](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/uche32/32/11569_2.png) [@Uche32](https://forum.zcashcommunity.com/u/Uche32)\ **Post date:** [September 2, 2017, 5:21pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/6 "2017-09-02T17:21:45Z")
try what Kahooli said ---
**Author:** ![Kadriel](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/kadriel/32/6184_2.png) [@Kadriel](https://forum.zcashcommunity.com/u/Kadriel)\ **Post date:** [September 3, 2017, 2:28am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/7 "2017-09-03T02:28:16Z")
If it is always gpu0 no matter what card it is, make sure all open windows are minimized. I’ve had it drop a lot of hashes when the windows are visible and not minimized. ---
**Author:** ![Kaizoku](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/kaizoku/32/5683_2.png) [@Kaizoku](https://forum.zcashcommunity.com/u/Kaizoku)\ **Post date:** [September 3, 2017, 4:37am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/8 "2017-09-03T04:37:52Z")
wew, this happened to me recently, for a few minutes to half an hour occasion… i thought my gpu0 is slowly deteriorated… not going to ask, but i found answers here… thanks community ---
**Author:** ![heavysymphony](https://avatars.discourse-cdn.com/v4/letter/h/f4b2a3/32.png) [@heavysymphony](https://forum.zcashcommunity.com/u/heavysymphony)\ **Post date:** [September 3, 2017, 6:03am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/9 "2017-09-03T06:03:14Z")
if te system is using GPU0 for monitor try enabling integrated graphic cards and connect your monitor to it if your CPU + MOBO supports IGPU ---
**Author:** ![turiman](https://avatars.discourse-cdn.com/v4/letter/t/ecae2f/32.png) [@turiman](https://forum.zcashcommunity.com/u/turiman)\ **Post date:** [September 3, 2017, 9:16am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/10 "2017-09-03T09:16:55Z")
You got it right man, if you use one of the 1080 TI’s as your monitor video output, it will take some mining performance away, if you have integrated video on your motherboard use that instead, so you don’t lose hash power. ---
**Author:** ![johnwisdom](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/johnwisdom/32/5836_2.png) [@johnwisdom](https://forum.zcashcommunity.com/u/johnwisdom)\ **Post date:** [September 3, 2017, 10:45am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/11 "2017-09-03T10:45:21Z")
EXACTLY: > [@turiman](#): > > You got it right man, if you use one of the 1080 TI’s as your monitor video output, it will take some mining performance away, if you have integrated video on your motherboard use that instead, so you don’t lose hash power. > [@heavysymphony](#): > > if te system is using GPU0 for monitor try enabling integrated graphic cards and connect your monitor to it if your CPU + MOBO supports IGPU * * * * * * * * * * * * > [@Keur](#): > > Oh and one more thing, when I mine LBC with cc miner all cards performe relativley the same, so no issue there… yes I have monitor plugged in gpu0 and if I disconnect it, nothing changes… Different algoriythm, difference resources. Equihash is more on the core, so having some fps drops and laggy mouse while mining and outputing image is normal. IMPORTANT FACT BEFORE SWITCHING FROM GRAPHIC CARD TO MOTHERBOAD: make sure you set in the bios to load screen from onboard graphics card and not from GPU or at least put auto detect, if you don’t update your bios setting you will be getting no video output! ---
**Author:** ![Nosfeu](https://avatars.discourse-cdn.com/v4/letter/n/8491ac/32.png) [@Nosfeu](https://forum.zcashcommunity.com/u/Nosfeu)\ **Post date:** [September 6, 2017, 9:14pm UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/12 "2017-09-06T21:14:25Z")
Becouse if u use 1080 ti with 8+8 pin one core use 1150 mv u need down to 931 mV on 1900-1926 Mhz for core. Optimal for mining zcash 1080 ti with 8+6 pin ![12313](https://global.discourse-cdn.com/zcash/original/2X/9/9c5df41f597e068f7db6ac4417e572139a27c52e.JPG) ---
**Author:** ![Keur](https://avatars.discourse-cdn.com/v4/letter/k/258eb7/32.png) [@Keur](https://forum.zcashcommunity.com/u/Keur)\ **Post date:** [September 9, 2017, 7:55am UTC](https://forum.zcashcommunity.com/t/ewbf-miner-gpu0-low-hashrate-issue/21092/13 "2017-09-09T07:55:00Z")
It seems that turning integrated graphics really helped thnx.