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The thread which sometimes talks about RDNA2

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How is that possible if Ampere is supposed to be more compute focused and RDNA 2 is supposed to be more gaming focused?
I could believe if the 6900 was say 15% faster than the 3090 at mining but not the 6800 being 50% faster.
 
Poneros said:
Click to expand...

That's probably a synthetic estimate
Effective bandwidth of:
  • 6800 is between 1.5-1.6GBps
  • 3090 900-1000GBps
But the effective bandwidth of 6800 depends on the assumption that the Infinity Cache will still maintain a 58% hit rate in mining like it does in 4k gaming currently.
For perspective, if cache hit falls to 0% the effective bandwidth of navi drops to 512 GBps.

Chuk_Chuk said:
How is that possible if Ampere is supposed to be more compute focused and RDNA 2 is supposed to be more gaming focused?
I could believe if the 6900 was say 15% faster than the 3090 at mining but not the 6800 being 50% faster.
Click to expand...

It seems the ethereum proof of work algorithm is bottlenecked by memory bandwidth. The rough rule of thumb is:
throughput in Mh/s = 10% of memory bandwidth in GBps
 
Chuk_Chuk said:
How is that possible if Ampere is supposed to be more compute focused and RDNA 2 is supposed to be more gaming focused?
I could believe if the 6900 was say 15% faster than the 3090 at mining but not the 6800 being 50% faster.
Click to expand...

Poor Ampere! So bad!

RX 6800 | RX 6800 XT | RX 6900 XT
RTX 3090

https://www.techpowerup.com/gpu-specs/radeon-rx-6800.c3713
https://www.techpowerup.com/gpu-specs/radeon-rx-6800-xt.c3694
https://www.techpowerup.com/gpu-specs/radeon-rx-6900-xt.c3481
https://www.techpowerup.com/gpu-specs/geforce-rtx-3090.c3622
 
AMD's fallback in case RAGE and RT suck.

https://www.amd.com/en/technologies/blockchain

https://optocrypto.com/amd-introduces-its-new-ethereum-mining-equipment/

They have been doing it for years.

AMD-696x410.jpg
 
I thought the world of cryptomining had moved on from GPUs since dedicated mining hardware was the only way to go as in n times faster than any GPU current or new. Thats the reason for us being able to buy GPU cards again for the past 1-2 years or so. Therefore yes that statement is both true and no one cares :).
 
Nablaoperator said:
I found something interesting. It seems some FC BGA packages use ABF (Ajinomoto Buildup Film) as buildup material which is in tight supply.

Jun '20 report
"ABF substrate shortages may widen into 2021. ABF substrate supply shortfalls are likely to widen further into 2021 as demand for 5G infrastructure, networking and high-end GPU and CPU applications has outgrown capacity expansions by makers of the substrates, according to industry sources."

Sep 20 report
"ABF substrate supply to stay tight despite no shipments for Huawei"

Now i don't know if Navi uses ABF. It would be right up the alley for chemical engineers frequenting the forums. Should be interesting to disuss
Click to expand...

Thanks bud. Yeah ABF substrate supply issue is what a few articles are calling out that has impacted Ampere also, as they use it. Coreteks seems to believe its playing a part in the Big Navi supply constraint as they balance substrate more towards their higher margin CPU and Console commitments. I can see from articles in 2019 that EPYC Rome used it, so I assume so.

Hey you all a bit quiet now substrate supply issues are being more widely reported @Hexsticks_ @humbug @Doobedoo @EastCoastHandle @danlightbulb

:p:p:p
 
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