Vega 64 HBCC cant enable on 4 of 8 Cards

[rubine2323]

Hi,

iam now playing around with it since 2 days. I cant enable HBCC for more then 4 cards.

My specs:

8x Vega 64
128 GB SSD
32GB RAM
G4400

Any ideas what could it be? Everything tried also 2-3 times complete system reinstall, driver reinstall....
I dont can get them running with HBCC.

[1714022182]

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[l1xx]

welcome to the club

P.S. Try increasing the vram to some extremes - like 80 GB, to see if u can make more than 4 to work.

[rubine2323]

Already tried. How many Vegas are you running and whats your ssd size? The last thing i would try is to get a bigger ssd. But i think it wont work again.

[l1xx]

I am running 6. I managed to make 5 work but only once, not happening since then.

The one time it worked is when I increased vram from 64 to 80, and with hdmi connected to one card and with disabled onboard graphics. But after a restart it was not working again.

P.S. I am on 8 ram and 120 ssd. How much ram do you see on the sliders with your setup? Mine's at 11600.

[rubine2323]

Mines at 24GB but it dosnt affect to mining hashrate. Hmm i dont know what i could do to make 8 to run with HBCC.

[l1xx]

Its quite easy actually, split em into two rigs, lol.

Btw, reduce the slider to 14 and try again.

[rubine2323]

Everything possible tried like playing arround with slider and things like that.

[Cryptobie]

Had similar issue on 8/Vega 64 rig. Increased ram and virtual ram to no avail still could not get two cards to activate hbcc. Then I looked in mb bios and increased allocated gpu mem to max from 256 and Boom all 8 cards running hbcc on cast xmr @ 2000+ hashes. Mb is gigabyte, not sure if this helps.