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[NZXT] Crypto Mining with the Kraken G10

post #1 of 10
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Under stock cooling, we saw one of the cores go up to 91C, giving us ~550Kh/s at an underclock to 800mhz, limiting our performance potential and running dangerously close to its thermal max. During this time we were also using a total system draw of about 700W.


When we rigged the HD7990 up with two Asetek coolers the temperatures dropped for the hot core about 30C and 20C for the cooler core. This allowed us to run all the way up to nearly...
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post #2 of 10
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Originally Posted by Frozenoblivion View Post

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Great article. Would love to mine but I have no cash to spend on another VGA and water cooling. This VGA mines at round 83ºC on air and this is when underclocked...
post #3 of 10
I was just sitting here the other night looking at the temps on my 7970s when mining, and considering going this option.

It is either that or get back into a full custom cooling loop for my system.
    
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post #4 of 10
post #5 of 10
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Originally Posted by AlphaC View Post

VRM temps?

This, mining stresses core and memory VRMs
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post #6 of 10
Quote:
Originally Posted by brucethemoose View Post

This, mining stresses core and memory VRMs

This is why a lot of people underclock their memory, to keep the stress down on them. With Litecoin mining you can drop your memory clock speeds pretty dang low without impacting your hash rate. Just in testing I dropped my memory from 1500 to 500 and took about 20 or so hit on the hash.
    
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post #7 of 10
Quote:
Originally Posted by PostalTwinkie View Post

This is why a lot of people underclock their memory, to keep the stress down on them. With Litecoin mining you can drop your memory clock speeds pretty dang low without impacting your hash rate. Just in testing I dropped my memory from 1500 to 500 and took about 20 or so hit on the hash.

You're confusing SHA-256 with scrypt (the dominant algorithm now that you need ASICs for bitcoin)

With scrypt, it's a memory hard algorithm and typically people overclock VRAM to 1500-1600MHz.
post #8 of 10
Quote:
Originally Posted by AlphaC View Post

You're confusing SHA-256 with scrypt

With scrypt, it's a memory hard algorithm and typically people overclock VRAM to 1500-1600MHz.

No, I am talking about the Scrypt mining of Litecoin.
    
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post #9 of 10
Quote:
Originally Posted by PostalTwinkie View Post

No, I am talking about the Scrypt mining of Litecoin.

Litecoin is Scrypt only, so people run higher memory clocks when mining LTC, as opposed to mining bitcoin or other SHA-256 coins
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post #10 of 10
Quote:
Originally Posted by Bl00dyMurd3r View Post

Litecoin is Scrypt only, so people run higher memory clocks when mining LTC, as opposed to mining bitcoin or other SHA-256 coins

Yes, I know that.

You can also drop your memory clocks to lessen the stress on the card without hitting too hard on the hash rate.

While I fully understand that the higher clocks can yield higher hash rates, it also stresses the living hell out of the GPU and VRAM. So, underclocking memory (and core) helps with this, and isn't a brutal punch the hash rate.

This allows people to mine that might not be able to do it otherwise. People have have cards that run hotter than they want primarily.
    
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