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Forking this from another thread as to not derail that one.

 

I used to get the typical (?) 45 MH/s on my card, but lately it's hovering around 35 MH/s. Apparently @Mick Naughty's cards are still going strong at 45, so I was wondering what I could do to investigate.

 

As a summary

Card: Founders Edition 1080 Ti on water

Miner: T-Rex Miner with memory tweak flags that should mimic the pill's effect

Pool: Binance

Afterburner settings: 75% power limit, +125 core, +600 mem

 

If I put the power limit back to 100% it's up to 38-ish. The card is toasty to the touch on the back side, could it be throttling itself or the memory? GPU core temp as at 50-60C, not too bad I would think.

 

Apparently it could be a hardware issue, as per Nvidia

Quote

We’ve confirmed that the performance drop is due to the size of the DAG exceeding the total on-chip TLB capacity on the Pascal GPU. As a result, there is an increased number of TLB misses, which affects performance. Because the TLB is a fixed capacity hardware resource, and the ETH algorithm accesses the DAG randomly, we don’t believe there are any software optimizations that could reduce the TLB miss rate.

In the Volta generation, TLB coverage was increased by 4x, and large DAG sizes (up to ~8GB, which won’t be reached for many years) will still fit in the on-chip TLB. So these newer GPUs (Volta and beyond) will show much less performance sensitivity due to DAG size.

https://forums.developer.nvidia.com/t/blockchain-drivers/110847/12

but then apparently one that only affects certain models?

 

TL;DR not enough magic internet money being generated, what can I check?

Crystal: CPU: i7 7700K | Motherboard: Asus ROG Strix Z270F | RAM: GSkill 16 GB@3200MHz | GPU: Nvidia GTX 1080 Ti FE | Case: Corsair Crystal 570X (black) | Storage: 250 GB Crucial BX100 SSD + 2 TB Seagate HDD + 1TB WD Green + 3TB WD Red | PSU: EVGA Supernova G2 1000W | Monitor: Asus VG248QE 24"

Laptop: Dell XPS 13 9360 | CPU: i5 7200U | RAM: 8 GB

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Hmm I dont do anything special with trex miner. I was doing it directly with the pool and running the pill. But back on nicehash with it doing it automatically.

Running 70% +200 on the core and +600 on mem. You know the memory manufacturer? 

Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 32GB, EVGA 1080TI SC Black, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

Spare RIg Corsair Air 540, I7 4770K, Asus Maximus VI Extreme, G.Skill Ares 32Gb, EVGA 1080sc & 1060 SSC, Corsair CX850M, Acer GD235hz 1920x1080@120hz

 

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10 hours ago, Mick Naughty said:

Hmm I dont do anything special with trex miner. I was doing it directly with the pool and running the pill. But back on nicehash with it doing it automatically.

Running 70% +200 on the core and +600 on mem. You know the memory manufacturer? 

Not sure on the memory manufacturer. Pictures I have aren't really readable and I'd have to take the loop apart to check.

 

I tried the pill as well, but that doesn't seem to do much either bumping it to 37 perhaps. Phoenixminer isn't any faster so I guess it's not the miners.

Crystal: CPU: i7 7700K | Motherboard: Asus ROG Strix Z270F | RAM: GSkill 16 GB@3200MHz | GPU: Nvidia GTX 1080 Ti FE | Case: Corsair Crystal 570X (black) | Storage: 250 GB Crucial BX100 SSD + 2 TB Seagate HDD + 1TB WD Green + 3TB WD Red | PSU: EVGA Supernova G2 1000W | Monitor: Asus VG248QE 24"

Laptop: Dell XPS 13 9360 | CPU: i5 7200U | RAM: 8 GB

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Well, I installed some pending Windows updates and upgraded the Nvidia driver to the latest one and now it seems to work again. 35 MH/s normally and around 43 MH/s at the moment after pilling. Also stole your settings and upped the OC to +200 core, +600 mem at a 70% power limit.

Crystal: CPU: i7 7700K | Motherboard: Asus ROG Strix Z270F | RAM: GSkill 16 GB@3200MHz | GPU: Nvidia GTX 1080 Ti FE | Case: Corsair Crystal 570X (black) | Storage: 250 GB Crucial BX100 SSD + 2 TB Seagate HDD + 1TB WD Green + 3TB WD Red | PSU: EVGA Supernova G2 1000W | Monitor: Asus VG248QE 24"

Laptop: Dell XPS 13 9360 | CPU: i5 7200U | RAM: 8 GB

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4 hours ago, tikker said:

Not sure on the memory manufacturer. Pictures I have aren't really readable and I'd have to take the loop apart to check.

 

I tried the pill as well, but that doesn't seem to do much either bumping it to 37 perhaps. Phoenixminer isn't any faster so I guess it's not the miners.

Gpu-z can tell you the manufacture. 

Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 32GB, EVGA 1080TI SC Black, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

Spare RIg Corsair Air 540, I7 4770K, Asus Maximus VI Extreme, G.Skill Ares 32Gb, EVGA 1080sc & 1060 SSC, Corsair CX850M, Acer GD235hz 1920x1080@120hz

 

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@tikkerStrange to hear the hashrate on your 1080 Ti has dropped like that.  I still have 5x 1080 Tis and they are all hashing between 47 to 49mhs with Phoenixminer and the ETHpill.  2 of those 5 cards were the original cards that I started mining with at the beginning of 2018, which is the only reason they haven't been replaced already.  

To answer your question about memory throttle, it's definitely possible.  As many are learning on newer gen 3080s and 3090s (myself included), you can easily throttle memory while having great core temps.  The only way to know is to find a way to monitor those mem temps or to simply replace the thermal pads and see if hash improves.  Either way, good luck man!

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58 minutes ago, Mick Naughty said:

Gpu-z can tell you the manufacture. 

Ah right. It's Micron according to GPU-Z.

56 minutes ago, done12many2 said:

@tikkerStrange to hear the hashrate on your 1080 Ti has dropped like that.  I still have 5x 1080 Tis and they are all hashing between 47 to 49mhs with Phoenixminer and the ETHpill.  2 of those 5 cards were the original cards that I started mining with at the beginning of 2018, which is the only reason they haven't been replaced already.  

To answer your question about memory throttle, it's definitely possible.  As many are learning on newer gen 3080s and 3090s (myself included), you can easily throttle memory while having great core temps.  The only way to know is to find a way to monitor those mem temps or to simply replace the thermal pads and see if hash improves.  Either way, good luck man!

Yeah I'll play around with memory clocks a bit to see what effect is has. 43 is already a lot better than 35 though, so I'm happy. I didn't see a difference between phoenixminer and trexminer before updates, but maybe now I can squeeze out a bit more.

Crystal: CPU: i7 7700K | Motherboard: Asus ROG Strix Z270F | RAM: GSkill 16 GB@3200MHz | GPU: Nvidia GTX 1080 Ti FE | Case: Corsair Crystal 570X (black) | Storage: 250 GB Crucial BX100 SSD + 2 TB Seagate HDD + 1TB WD Green + 3TB WD Red | PSU: EVGA Supernova G2 1000W | Monitor: Asus VG248QE 24"

Laptop: Dell XPS 13 9360 | CPU: i5 7200U | RAM: 8 GB

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I think Phoenix has a smaller dev fee than trex. Excavator is “free”. 
 

All of mine are micron as well. 

Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 32GB, EVGA 1080TI SC Black, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

Spare RIg Corsair Air 540, I7 4770K, Asus Maximus VI Extreme, G.Skill Ares 32Gb, EVGA 1080sc & 1060 SSC, Corsair CX850M, Acer GD235hz 1920x1080@120hz

 

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