Do your 2GB still work on ETH?

adaseb

Just started noticing many 2GB GPUs for sale. Also noticed a few threads with people having issues.

I had mine mining ZEC but decided to try ETH and all of them don't work except for a Radeon 6990 2GB (Pre-GCN) and a 7850 on one rig running Windows 10 with a bunch of 470s.

This is all based on the Claymore 7 ETH miner.

SpydrMstrmnd

The dag is approaching 2GB at this point, so no generally speaking they will not work. 3GB cards are the minimum right now; the vast majority of cards on the network are 4GB+

Btw, if you're thinking of new cards a 4GB should (should) carry you to the end of practical mining on eth with no buffer issues.

CryptoManiac

I still have R9's 270x with 2GB memory and they mining just fine. They achieving 12 Mh/s so it is not much worse then 15 Mh/s on 3 GB R9 280x. And they are using much less electricity then R9 280x. It is worth to consider for good price. I am using Claymores Miner.

adaseb

Restart the miner and see if it still works. I had mine running also but when I restarted the computer it would no longer mine with 2GB.

theneogeo1982

Make sure virtual memory is set to 16gb and batch file look like this
GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
ZecMiner64.exe

work

@theneogeo1982 zec doesn't even need those env vars set.

theneogeo1982

For eth he does, he's having issues with it

adaseb

In a few hours there is another DAG, we will see if more people are having issues.

verjic

What size is DAG now?

adaseb

Current EPOCH #89, in a few hours it will be #90.

adaseb

Another 2GB stopped working today when we got Epoch #90.

It works until you re-start your program.

work

@adaseb have you tried with -eres 0 in claymore? Should buy you 1-2 more dag changes. By default, eres is set to 2, so the space reserved for the DAG is 2 sizes in the future.

Probably why it works until you restart.

adaseb

WORKS!

Nice thanks for the tip. I guess its the final 10 days of the Radeon 6990 hashing.

Currently ETH is most profitable with that GPU. After this might be time to retire the 6 year old GPU.

12.5W/MHS but still works. 40nm Technology.

work

End of an era! 2GB cards soon to be no more. At least there is zcash mining around now.

adaseb

work said:

End of an era! 2GB cards soon to be no more. At least there is zcash mining around now.

Yeah except I can't mine ZEC with that 6990. Gets 5H/s per core so 10H/s and uses 300 Watts.

work

Damn, sad performance is that bad. End of an era for sure then.

wirelessnet2

@work well there's still ethereum forks I guess
ETC maybe? It's pretty profitable too

adaseb

wirelessnet2 said:

@work well there's still ethereum forks I guess
ETC maybe? It's pretty profitable too

You mean EXP.

ETC definately wont work.

wirelessnet2

@adaseb am I stupid? or isnt the DAG smaller on ETC

work

@wirelessnet2 ETC and Eth have the same genesis block and DAG rules, so their epoch's won't be far apart.

Eth block height: 2705838
ETC block height: 2708069

Looks like epoch 92 will actually occur on ETC first.

wirelessnet2

@work oh ok I'm just dumb then. LOL sorry

wirelessnet2

RIP cayman and all 2GB cards for ETH after epoch 92. Difficulty should drop a bit
hopefully

Hotmetal

So how long do 3 and 4 gig cards have until they can not mine ETH/ETC?
Is anyone able to calculate that?

adaseb

16 more months for 3gb

Hotmetal

adaseb said:

16 more months for 3gb

Thank you so much for working that out! 4 Gig cards have another ~3 years?

adaseb

Yes but you do realize ETH will go POS in 6-12 months or so.

Hotmetal

Yes, but we'll be mining ETC then

adaseb

Hotmetal said:

Yes, but we'll be mining ETC then

ETC has no real value.

Not worth mining to make $0.05-$0.10/day/per GPU.

adaseb

Well its definately not working now with the new EPOCH.

wirelessnet2

@adaseb my 2GB cards are still working... I just turned them on
6990 and 6970 are both still hashing at 13.8MH/s per core

wonderfullife

Epoch #91 2Gb 380 still works.