MSI R9 390 - overclocking question

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• vincetcm Member Posts: 21 ✭

  March 2016

  http://62.212.74.86/~mining/list/index.php

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• 390g Member Posts: 45 ✭

  March 2016

  @vincetcm - Thanks a lot ... I believe i misread the details about the HD7990...

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• 390g Member Posts: 45 ✭

  March 2016

  I take that back.... somebody clocked POWERCOLOR HD 7990 for 43 mhs.... that would be awesome....

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• 390g Member Posts: 45 ✭

  March 2016

  anybody know if i can have R9 390 and HD 7990 in a same rig?

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• Marvell9 Member Posts: 593 ✭✭✭

  April 2016

  why the F would you ovcerclock a card that pulls over 330 watts already ?!

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• 390g Member Posts: 45 ✭

  April 2016

  @Marvell9 - for more hashing... is that bad idea? ... I appreciate if you can give little more information on ...what kind of dum mistake i am doing...

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• 390g Member Posts: 45 ✭

  April 2016

  @Marvell9 - OOTB i got 27.1 mhs... I tuned the core 1150 & mem 1300 ... that increased my hasing to 30 on each card....

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• MARETH2 Member Posts: 35 ✭

  April 2016

  What, this card pulls 330 W at mining??
  
  I'm also thinking about buying 4 of them and I have 1500 W enermax platimax PSU.
  Will this be enough?
  
  And should I use powered risers on Asrock H81 pro btc board or non-powered?
  
  Thanks.
  
  

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• Purgent Member Posts: 35 ✭

  April 2016

  390g said:

  Has anybody got R9 390 to hash more that 30 mhs?
  
  I am planning to add to more GPU to my rig which already has (4 x R9 390 )... based on the information I got from forum and other source... I believe HD 7990 ( overclock to 40 ) & R9 290X ( 32 ) has better performance... any thoughts.

  I can overclock my XFX 390s to almost 33MH, but I am using a moderate OC of 1125/1515 right now instead that gives right about 31.3MH
  

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• work Member Posts: 2,084 ✭✭✭✭

  April 2016

  @Purgent Are you sure overclocking the memory has any benefit? I run my 290s at 1120/1250 (stock memclocks) and get the same hashrate.

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• modovich Member Posts: 1 ✭

  April 2016 edited April 2016

  I run my 390 at the following:
  
  Downvolt to 1.108v
  Core: 1100
  Memory: 150
  
  Doing ~31MH/s (more like 30.7)
  
  Draw from wall is around 200W (the entire draw is 270W including all other components, this is currently a rig with this single card)
  
  EDIT: ethminer config
  
  (This one is on the old ethminer that accurately shows my hash rate)
  --gpu-mining-buffers 1 --gpu-batch-size 22 --gpu-workgroup-size 256 --farm-recheck 202 -t 1
  
  (The latest one from the cpp
  --farm-recheck 202 -F http://192.168.1.15:8080/eth1 -G --cl-local-work 256 --cl-global-work 8192

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