How to underclock a HD 7970 TechPowerUp Forums

Debunking myths about mining and GPUs

E: Going to bed, will contribute more tomorrow. Thanks for the discussion!
Myth: Mining is more stressful than gaming. Fact: It depends. During the old days, this was plausible, because older GPUs (Pre-polaris) are/were bottlenecked by core clock when mining the most profitable coins. Thus, miners overclocked and overvolted these cards quite frequently, especially with cheap electricity. This meant that those cards were often run hot, pushing the limits and stressing VRM and fans quite a lot. Nowadays, ethash (Ethereum) is the most profitable algorithm for AMD cards 99% of the time, and newer GPUs (Polaris) are limited by memory bandwidth and latency. Miners can underclock core to the low 1100MHz range before seeing performance drop. To save power, miners who know what they are doing also undervolt, since it is no longer necessary to sustain a high core clock. Thus, it is quite feasible to run polaris cards below 70C at a reasonable fan speed. However, dual mining (mining more than one coin at once) does increase power consumption by up to 20%, and there are also idiots who run their polaris cards OCd while mining. With the exception of a few idiots, miners treat their Polaris GPUs pretty much the same; that is, running underclocked and undervolted 24/7 with a memory strap mod and mem OC. On the other hand, former gaming cards are highly variable in use cases. Some gamers leave their cards at stock settings, some undervolt, and some OC and/or overvolt. Most of the time, these cards are thermal cycled far more often than mining cards, which is known to weaken solder. Another thing to consider is that manufacturers have learned (somewhat) from their mistakes of putting shit tier fans in GPUs, and many fans on modern GPUs are ball bearing and/or swappable. Even some budget cards, such as MSI Armor, use decent ball bearing fans. Bottom line: the risk of buying mined Polaris cards is not as high as the risk of buying older mined cards. I would not be against buying mined polaris cards, but it's not necessarily better than buying a gamer's card instead. At the end of the day, it depends more on how the owner treated it than what they used it for.
Myth: GPUs are obsolete because of FPGAs and ASICs Fact: Mostly false. Older algorithms such as scrypt and SHA256 (lite/doge/feathebitcoin etc) are no longer feasible to mine with GPUs, but there have been multiple algorithms since then that are built to deter ASICs; most of the time it is done by making it memory-hard because designing an ASIC with high memory throughput is considerably more expensive to design and manufacture. Many devs prefer their blockchain to be ASIC resistant to avoid the concentration of power problem that Bitcoin is having nowadays, where a giant, near-monopolistic ASIC manufacturer (Bitmain) is causing a lot of (subjective) controversy. Blockchains based on ethash (Ethereum and its forks), equihash (Zcash and its forks) and cryptonight (Monero and forks) are some examples, but there are scores of other shitcoins and a few other algos that are GPU dominant. It is almost impossible that there will be another ASIC takeover, which is what was responsible for the stop in GPU demand in the bitcoin and litecoin days. Bottom line: ASICs no longer threaten GPU miners, or the demand for GPUs
Myth: Ethereum switching to Proof of Stake will kill mining soon Fact: Doomsayers have been preaching about proof of stake since late 2015. It has always been "coming soon." The fact is, the Ethereum roadmap goes from proof of work (mining) -> Casper (mining + PoS) -> Metropolis (PoS). Currently, the release date of Casper is not even announced yet, nor is it being tested in a (public) testnet. Proof of Stake might one day take over, but mining is here to stay for a while yet. Another thing to consider is that there are tons of other GPU mineable blockchains, and although Ethereum is biggest, it is certainly feasible that mining stays profitable even after Ethereum goes PoS (if it ever does). However, it is possible that profits will be low enough to discourage new miners. Bottom line: It's very unlikely. E: I screwed up the roadmap; here is a better source than me with some interesting information: https://www.ethnews.com/ethereums-vitalik-buterin-gives-keynote-on-metropolis
Myth: The current Ethereum demand spike is a bubble Opinion: Honestly, I don't know. I would not be surprised if stricter regulations on ICOs come sooner or later, which would fuck with Ether prices. There is also the inherent volatility of cryptocurrencies. However, it is also possible that blockchain technology continues to gain traction; that is, the price could just as easily go up as go down. Although it's fun to read about other people's opinions, only time-travelling wizards can tell you when it will become economical again to upgrade your poor HD5770. Bottom line: No one knows.
Myth: Miners will "steal" all the RX Vegas Fact: Only a reckless miner would buy Vegas on release, since mining performance is not known. In fact, it is possible that it can't mine at all (or at some stupidly low speed) until devs add support to existing miners. It would be even more reckless than gamers who buy without seeing benchmarks, since at least gamers can expect the games to actually run. It's also not necessarily the case that Vega will be good once miners do add support. Maybe there will be enough reckless miners to affect supply, maybe not. Of course, it is possible that miners will deplete the supply after it is demonstrated that Vega is good for mining. Bottom line: Most miners won't preorder, but it's possible that a significant number will. E: Important to remember that even if mining demand isn't high, doesn't mean that supply will be plentiful.
Myth: Nvidia cards SUCK at mining Fact: Mostly false. They USED to suck in the old pre-Maxwell days, but now they are actually more efficient at mining Ethereum and Zcash compared to AMD cards, even after both cards are undervolted. The flipside is that they (used to) cost more for the equivalent hashrate. For reference, my old 5xRX470 rig drew just under 800W when mining ETH only and hashed at 150MH/s. My current 6xGTX1060 rig draws just over half of that (<450W) and hashes at about 135MH/s. Certainly not as good in raw performance, but they are viable nonetheless, especially given the AMD GPU shortage. In fact, Nvidia cards (1060 and especially 1070) are becoming scarce as well. Bottom line: Nvidia is still the underdog when it comes to mining, but far from irrelevant nowadays.
Myth: 4GB cards will be obsolete for mining soon Fact: FALSE. The Ethereum DAG is not even 3GB yet, and won't be for a few months. The recent reports of 4GB Polaris cards slowing down soon due to DAG size is caused by limited TLB capacity, not VRAM restrictions. Polaris cards will still be able to mine ETH forks such as Expanse and UBIQ without diminished speed, and even if they are used to mine ETH, it is not that much of a performance hit at first. It would certainly not make polaris useless or undesirable for mining anytime soon. Tahiti GPUs already suffer from this issue and Hawaii is the most resistant to this issue. Have not benched Nvidia at a later epoch.
Myth: Creating miner-bashing posts on Reddit will help alleviate the GPU supply problem Fact: False, you are simply giving cryptocurrencies and mining more exposure to the general public, increasing demand.
Myth: Mining-specific GPUs will solve the shortage problems Opinion: There's not enough info to tell yet, but I am a skeptic for the following reasons. First, no display limits the resale value of the card for obvious reasons. IMO, the whole point of crypto mining from a profitability standpoint is to have a hedge against coin volatility (hardware is still worth something if the coin crashes). Otherwise it is much less effort to just buy and hold the coin. If the hardware is useless without demand from other (significant) sources, then it doesn't make much sense to buy it unless the price is extremely low. I'm sure that cost-downing the PCB and warranty will make for a cheap card, but it has to be extremely cheap and plentiful in supply, or else miners will buy whatever they can get. I could envision "failed" chips (not meeting spec of consumer editions) being stuck in miner cards, but I doubt there are enough to meet demand without ramping up production as a whole, which carries its own risks. I guess that it would help a little, but probably not solve the problems. Alternatively, since modern GPUs are bottlenecked by RAM when mining, it might be enticing to miners to have the fastest (GDDR5) RAM on the market (probably the 9gbps chips from the 1060 6G 9gbps edition, although I don't have one to test). However, my previous points still apply; buying such a card without display outputs carries a big risk. Bottom line: It's not a great idea, unless they are super cheap or use really good RAM.
Hope this helped; if you have any further questions I will try to answer them. I'm both a gamer and miner who uses both AMD and Nvidia roughly equally and don't favor one group over another. I've mined and gamed on all high end AMD GPUs since Tahiti (except Tonga) and all Pascal cards except 1050ti.
submitted by key_smash to Amd [link] [comments]

Need help tweaking 7970s - stuck at 500-550 kh/s

I finally stopped being lazy and booted up my old 7970s that I used to mine Bitcoins. I am mining Tagcoins right now and I believe it will be up there along with LTC and BTC. It's only about a month old and is already at $1.7 and it's backed up by a multimillion dollar company. Read more here:
https://bitcointalk.org/index.php?topic=317408.0
Anyway a little history about these 7970s:
They were never overclocked.
They were always undervolted to 950 mv and memory underclocked to 100mhz
The temps were always below 70C with huge box fan blowing at them.
Current Settings for Scrypt Mining: undervolted to 1000 mv and stock settings for clock / mem at 925 mhz / 1375 mhz. These are Asus Reference cards (bought them at launch to mine BTC).
CGMiner Settings:
cd cgminer C:\Users\Bitcoin\Desktop\cgminer-3.7.2-windows\cgminer.exe --scrypt -o stratum+tcp://tagmining.com:3333 -u xxx.xxx-p password -o stratum+tcp://wk5.botpool.net:5933 -u xxx.xxx-p password -I 13 -g 2 -w 256 --thread-concurrency 8192 --shaders 2048 --temp-overheat 80 --gpu-engine 925 --gpu-memclock 1375
I am using the following drivers:
13.11 Beta Catalyst Drivers
2.9 SDK
CGMiner 3.7.2 (latest to support scrypt mining)
Computer Specs: i7 2600k 3.4Ghz Stock MSI Big Bang Marshall 3 8GB DDR3 RAM ASUS 7970 X 4 Reference Cards 1300W CoolerMaster Gold PSU 2TB HDD 7200RPM
Any help would be appreciated!
CGminer Screenshot:
http://i.imgur.com/PNrFA3U.png
submitted by AperturePCs to litecoinmining [link] [comments]

Need help tweaking 7970s - stuck at 500-550 kh/s

I finally stopped being lazy and booted up my old 7970s that I used to mine Bitcoins. I am mining Tagcoins right now and I believe it will be up there along with LTC and BTC. It's only about a month old and is already at $1.7 and it's backed up by a multimillion dollar company. Read more here:
https://bitcointalk.org/index.php?topic=317408.0
Anyway a little history about these 7970s:
They were never overclocked.
They were always undervolted to 950 mv and memory underclocked to 100mhz
The temps were always below 70C with huge box fan blowing at them.
Current Settings for Scrypt Mining: undervolted to 1000 mv and stock settings for clock / mem at 925 mhz / 1375 mhz. These are Asus Reference cards (bought them at launch to mine BTC).
CGMiner Settings:
cd cgminer C:\Users\Bitcoin\Desktop\cgminer-3.7.2-windows\cgminer.exe --scrypt -o stratum+tcp://tagmining.com:3333 -u xxx.xxx-p password -o stratum+tcp://wk5.botpool.net:5933 -u xxx.xxx-p password -I 13 -g 2 -w 256 --thread-concurrency 8192 --shaders 2048 --temp-overheat 80 --gpu-engine 925 --gpu-memclock 1375
I am using the following drivers:
13.11 Beta Catalyst Drivers
2.9 SDK
CGMiner 3.7.2 (latest to support scrypt mining)
Computer Specs: i7 2600k 3.4Ghz Stock MSI Big Bang Marshall 3 8GB DDR3 RAM ASUS 7970 X 4 Reference Cards 1300W CoolerMaster Gold PSU 2TB HDD 7200RPM
Any help would be appreciated!
CGminer Screenshot:
http://i.imgur.com/PNrFA3U.png
submitted by AperturePCs to BitcoinMining [link] [comments]

CINEBENCH R15 SC Ryzen 7 3700X 3,9GHZ underclock undervolt in Louqe GHOST S1 AMD Ryzen 3000 Memory Benchmark & Common RAM Mistakes ... How To Underclock, Undervolt An Antminer S1 (Pencil Mod) CINEBENCH R20 Ryzen 7 3700X STOCK VS 3,9GHZ underclock undervolt in Louqe GHOST S1 Bitcoin Pumping to ATH - Cryptocurrency & Stock Market Analysis - LIVESTREAM 6/2/2020

SourceQuote: Under stock cooling, we saw one of the cores go up to 91C, giving us ~550Kh/s at an underclock to 800mhz, limiting our performance potential and running dangerously close to its thermal max. During this time we were also using a total system draw of about 700W. When we rigged the... I'm trying to find out how to underclock memory my 7970 to reduce temps when Bitcoin mining. I tried AB with no luck. Could some please help. for example: these memory timings (but stock memory clocks) VS max memory clocks most of our cards can do in average = whats best? thank you for your help. Quote: Originally Posted by -Loladinas-it varies by card. Depends on the quality of vram chips themselves and the IMC. I'm getting more bandwidth from 2125MHz + custom timings, than 2300MHz + stock timings. 241GB/s vs. 234GB/s. And then ... Ethereum stock 22.3 Mh/s; bios mod + oc 28.5 Mh/s (elpida memory) ZCash stock 273 H/s ; bios mod + oc 293.3 H/s; Power Usage: N/A ; Gigabyte Radeon RX 570 Gaming 4GB Graphic Cards GV-RX570GAMING-4GD Price:$190.52 ASUS ROG STRIX RX 570 4GB GAMING OC Edition ASUS ROG STRIX RX 570 4GB GAMING OC Edition mining performance No data yet. GPU/memo clock: N/A; Ethereum: N/A; Power Usage: N/A; ASUS ROG ... Well I have a xfx 480 gtr with stock 1150mV and 1280 or something boost clock. I was able to uv it to 1090mV with 1380 Hz and 2150 memory clock. Cool and quiet :) level 2. 3 points · 2 years ago. WTF, some silicon lottery there :P . Continue this thread level 1. 3700X 5700 XT 32GB 3533 16-18-18-18-36 2 points · 2 years ago. This is what I've been using without any problems. https://imgur ...

[index] [9257] [15805] [49589] [2171] [36852] [18726] [48560] [16205] [15896] [10314]

CINEBENCH R15 SC Ryzen 7 3700X 3,9GHZ underclock undervolt in Louqe GHOST S1

Get PAID to PLAY GAMES online! Be a video games tester NOW! https://37d439pxxcd8xw47l6riq2jzcd.ho... Click Here to Purchase Flat Belly Detox! Lose weight FAST! TRY TO BELIEVE! https ... Thanks for watching! For donations: Bitcoin - 1CpGMM8Ag8gNYL3FffusVqEBUvHyYenTP8 Configuration: Mobo: B450 I AORUS PRO WIFI - CPU set in BIOS for 3,9GHZ rest on auto CPU: AMD RYZEN 7 3700X Cooler: NH-L9i with AM4 adapter Ram: G.SKILL 16GB 3000MHz Trident Z RGB LED CL16 F4 ... Ryzen 3000 RAM frequency, latency, uclock, mclock, and fclock matter more than anything else for the R9 3900X, 3700X, and 3600. We're looking for the best RA... CINEBENCH R20 Ryzen 7 3700X STOCK VS 3,9GHZ underclock undervolt in Louqe GHOST S1 ... +150MHZ core clock, +1200MHZ memory clock Disk: Samsung 970 Evo M.2 500GB + Crucial MX500 500GB Case: Louqe ...

#