Just wondering if there are any ways to tweak or mod Tahiti type GPUs to increase ETHEREUM mining performance. Since ETH mining is very memory intensive, it would help boost speed if the memory clock could be overclocked beyond 1600mhz.

 

I got a few Gigabyte 7970, Asus 280x, Asus 7970, wondering if there are any mods I can do to be able to overclock the memory past 1600mhz to around 1800mhz?

ETH mining is not memory intensive,i am mining with a few 390x here and raising the mem clock or going down is no help.

 

We need a bios with disabled ROP's and tweaked voltage to be able to lower power draw and increase hash rate,however the only one who can help us there is @The Stilt .

The mining algo uses the memory bandwidth and that's why some 280x cards as faster then 380 cards so the memory does play a big roll.

Does changing the MEMCLK from 1250, 1375 or 1500MHz to +1MHz (e.g. 1501MHz) degrade the performance? If not, then then workload is not latency intensive.

Try to clock without adding voltage, then put voltage down and look limit. You will get some performace AND energy saving aswell

I'm running six R9 380's here with -10mV and 1175 on the core, coupled with 1500 on the memory. Increasing the frequency on the VRAM definitely does improve performance. As said above, it is a very memory intensive algorithm.