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Ethminer found my Sapphire R7 370 Nitro 4GB but only shows 3221225472 bytes of memory.

My r7 had 4GB of memory.

I would like to konw why my Sapphire R7 370 4GB only use 3GB of gpu memory.

I am using the last version of ethmine (Ethminer 0.9.41-genoil-1.0.4b3) on operating system is Windows 10 Home.

  • Has nobody an idea? I am grateful for every tip – coreytaylor211 May 7 '16 at 12:54
  • that's indeed very strange. did you try to use differtent tools to diagnose the gpu memory? – Afr May 8 '16 at 9:44
  • Yes i uesd gpu-z and eversthome and they show 4GB gpu memory. – coreytaylor211 May 8 '16 at 10:06
  • Ok then it might be a bug in genoil's code. Or it's a 32/64 bit issue? – Afr May 8 '16 at 10:07
  • what can i do? Is the ethminer open source ? – coreytaylor211 May 8 '16 at 10:22
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My fork is open source. I didn't write the code that counts RAM on OpenCL devices though, but I have never seen it report the wrong size on any card I have used. Perhaps it is an OpenCL driver issue.

Anyway it's not a big deal for ETH mining, 3GB is enough.

edit: create a bat file with these and insert your ethminer launch command in the last line. that should fix it.

setx GPU_USE_SYNC_OBJECTS 1 
setx GPU_FORCE_64BIT_PTR 0 
setx GPU_MAX_HEAP_SIZE 100
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
ethminer -G ... 
  • Thank you for your comment. How much does the 1GB more on speed ? Can you fix this? Or is that too complicated ? I use 4 x R7 370 Nitro . – coreytaylor211 May 8 '16 at 18:35
  • Exactly 0H/s. In other words, nothing. That said, it is strange why it is listed as 3GB. Can you paste your full launch bat file? – Genoil May 8 '16 at 20:25
  • see edited Answer – Genoil May 8 '16 at 20:48
  • I have the orders already in my file , but that does not help . Thank you for your help – coreytaylor211 May 9 '16 at 4:31

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