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GabryRox
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October 15, 2016, 11:32:24 PM |
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@Claymore, few questions:
1) -cclock: you wrote "you can overclock only", but it seems not to be true for, at least, Windows and Polaris. My 470x can be underclocked (GPU set to 1150 for all states).
2) Any chance to support -cclock and -mclock on Linux for amdgpu-pro drivers (for Polaris)? It is not said "unsupported on Linux", but does not work for me (mem can't be set to 1950 using this).
3) Any chance to support -cvddc and -mvddc on Linux for amdgpu-pro drivers?
4) Are older cards like 7950/7970 supported using amdgpu-pro drivers on Linux?
5) There is an issue on Windows when used -*clock commands: they are applied at some init stage, but for my 470x it instantly changes hashrates only for the card with monitor connected. I can stop and resume other cards for changes to take effect (and show correct/new hashrate), but probably makes sense to fix it somehow, so miner shows correct hashrates after applying values. Of course, if you run it for 2+ time, drivers keep settings and there is no that effect. Still, it is surprising when you run minr with some value and it is not reflected in hashrates.
1. AMD disabled underclocking in theri drivers in past. May be it enabled it again in recent drivers, I did not check it. 2. Linux requires root access for it, I remember someone said that even sudo is not working. 3. Did not check if it is possible. 4. I did not check it. 5. So if I take two 4xx cards, start miner with -*clock option and it will change clocks only for one card? 5. No. In short: changing memory clock using any tool does not change displayed hashrate until miner restarted or card stopped/resumed. Except a card with monitor connected: for it new hashrate is shown instantly. When I change memory freq using any tool (WattTool) for a single card while miner is running, it instantly changes displayed hashrate only if the card has connected monitor (tested on Rx470). For headless cards the hashrate shown is not changed until miner restarted or card stopped/resumed. That seems to be a feature (@All: please confirm, but I saw someone complained for the same issue). When you change freq using miner cmdline, and previous freq was not the same, miner sets freq but shows hashrate for old freq until restarted. 5. Some cards I have, wattman doesn't allow changing clocks/voltages unless I pause miner. I didn't think of if monitor was connected. I have some display emulators I got for $15 that helps with VNC, but not sure it would be worth it for more than that... It is very strange for me because sometimes displayed hashrate changing when I change ram frequency, sometimes it doesn't react sometimes it react for gpu frequency though  So, I have been using CDM 7.2 for about 5 days now on my W7 system. I was finally able to reduce my wattage pull through Wattman setting (and disabling dual mining), but am still stuck on a paltry 20.75 Mh/s on ETH per each of my MSI RX 470's. I have tried everything on the CDM side, such as setting ETH intensity to the max of 16 in my command line, adding in all 5 of the recommended setx lines, set my virtual memory to 24GB, etc. None of this moved the needle at all.
So, I am now trying the overclocking route before getting into modding the bios on these. A few things are perplexing though. In my Wattman, each of the 4 GPU's can only be increased from 1650 default to 1700. These seems like a very low limit to me and setting all 4 to 1700 had zero impact.
So, using Afterburner, it actually gave me the option to raise Memory Clock all the way to 2100. I only tried 1850 and applied to all 4 GPUs but yet again, absolutely NO impact... all 4 still mining at exactly 20.75. So, my question is, am I doing something wrong? Shouldn't raising the the clock speed on these yield at least a 5-10% bump in mining hash-rate? Or am I completely off base here?
I know of many people using these cards that have achieved 23+ right out of the box, so still trying to figure out why I cannot get close to that mark.
Please update your driver version.. I have same issue with my rx 480 before update drivers I was able only to increase RAM frequency from 2000 to 2100Mhz, after update I can set 2250Mhz in Wattman  Thanks, but I updated to Crimson 16.9.2 over a week ago and it had zero impact. However, I was finally able to at least get a little HR increase by setting to 1700 in Wattman. Unfortunately, this put my wattage usage through the roof! Increased it 50-60W at the wall (although strangely, Afterburner showed steady wattage at around 74 with no increase after moving to 1700 and I can't figure out why). And, this was for only 1 GPU... doing to all 4 pushed my up to around 750 (from 625 before)... all for a measly increase from 20.75 to 21.45, so clearly not worth the extra power drain. I since reset everything in Wattman, tweaked down the GPU mV settings in states 6 & 7 and I'm back down in the 620 range with each of the 4 470's hashing a pretty pathetic 20.7. Bottom line is that a bunch of others here got 23+ out of the box on these cards... no modding, no OCing, nothing. So, I guess I just got really unlucky with my batch. I guess a pseudo-silver-lining is that this makes my decision really easy on modding the bios on these. I had previously thought that if I got 23 out of the box and could OC 1-2 more, then I wouldn't risk modding. But now, it's a no-brainer since there is no way I'm going to ever be happy running this rig getting less than 21 per card, nor will it likely ever be profitable that way. So, hopefully after modding I can at least get in the 25-26 range. If not, then I don't see much point in adding a 5th card to this rig. My next rig though will not be built with MSI cards, that's for sure! What card do you have? The better 470 4GB cards have 7GHz (1750), will do 22MH memory, the 8GB cards have 8GHz (2000) memory (except the terrible MSI ones....) and will do 24.6 (stock, I don't OC them). The best are the Sapphire Nitro, good memory, best undervolting from the ones I have tested. The 470 4GB with 6.6 or 6.7GHz memory you should avoid, also MSI 8GB, only has 6.7GHz, should be 8GHz, since it costs same as the Sapphire, but it has bottom of the barrel memory. Edit, I see you have MSI 470s.... well, that's unfortunate. I didn't buy any of them, even early on and supply was hard to find, because their memory is slow (always look at specs on cards... newegg usually has all the details). Nitro 8GB Sapphires on sale right now @ newegg... Thanks for the feedback, I will definitely consider this while purchasing to build my next rig. I will see what I can squeeze out of those MSIs through the commonly used strapping mod. Others with those cards have been able to achieve close to 5W/MH on a 6-card rig, so theoretically, I should be able to at least get close to 6 on a 4/5 card rig, even if i got a slightly bad batch of them. Thanks for the tip on the sale also, I will check that out! |
