Topic: Hashrate RX 470 - page 18. (Read 135060 times)

Since the 470 has 4 fewer compute units, it has to run at a higher core clock than the 480 to achieve the same hashrate.  To run stable at a higher clock, you need a bit higher voltage.  This means higher power consumption than the 480 for the same hashrate.

really can't say other then I flashed it with the Bios it had before with new settings and the cards them self still use about 88 watts per card the whole three card rig system probable uses about 300 watts at the wall total because i have it running with a A10 apu and newer model XA88 plus fm mother board,  i had laying around when i built the rig, maybe i should plug it into a meter and check for total power usage. According to CPUID HWMonitor and TechPowerUp GPU-Z each 470 is using under load 88 to 95 watts more at the 88 mark then anything .Posted stats for one 470 sense the other one is showing about the same . My VRM temps are  @ 76 c according to  WattTool on the REF CARD. so i went looking and that's is a good temp to have for VRM , that should really be the big worry and not much is said about it on the forums . for me thu that's to high  for the VRAM and most of the GPU I have ever owned I modded with better cooling later on and i won't let the VRM go over 60 c.I just need to learn more on how the 400 series work then as buy more i will modded the cooling .






The ref card runs a tad hotter then the nitro + card the nitro VRM according to watt tool is @ 58c VRM , so I'll be looking at ways of adding more cooling to the VRAM on the REF CARD as time goes and changing the cooling to either water or a two fan system with modded cooling for the VRAM , I know I'm being over kill but it's fun.

Can you share what card you have that can push to 40 MHz? It seems your 4GB card is hashing more than the 8GB card...

I'm getting 620w for 4 470s at the wall, includes all the system and 2 120mm fans at max rpm.  105mhs + 2100 dcr, like 520dcr per card.  If I drop it down to low dcr intensity it drops down by almost 40-60w.  My voltages are a little high, but this is rock solid stability.  0.92-0.93v.  Had 0.88v but some issues every 48hrs, especially when claymores rig does the ETH fee, pool disconnects, etc.  So its very possible to get sub 500w for the whole system. 

I got 4 470 running on one rig ...

Able to achieve 27 / 330 with 470 off the wall ... devil card.

Was able to achieve 26/300 with 390 off the wall before.

See my post here: https://bitcointalksearch.org/topic/wich-is-better-rx-470-refference-or-custom-fan-1615394

PolarisBiosEditor-master
both my RX 470 now do 27 MH without using MSI afterburner to over clock, I use this https://bitcointalksearch.org/topic/claymores-dual-ethereum-amdnvidia-gpu-miner-v150-windowslinux-1433925  Claymore's Dual Ethereum AMD+NVIDIA GPU Miner v7.2  at stock setting i don't use any of Claymore's settings, i let run it at default settings,  i edited the bios so it over clocks from the card with out using third party soft ware and it works much better ,I 'm still having issue with https://github.com/genesismining/sgminer-gm/releases/tag/5.3.0-gm I will find that sweet spot once i take the time and do nothing but that . but to answer your issue or give some free insight i tested it  read this post it will help a lot more then here does . .


https://forum.ethereum.org/discussion/9533/28mh-470oc-nitro-4gb-boysie-rom-dual-mining


it works for the reference 470 and the Nitro-4GB 470 . i have a reference and a Nitro-4GB 470 running @ 27 MH but i did not try to change to his memory straps yet for 1500 but it does auto and works great, i would not flash his BIOS to your card what i did was use PolarisBios Editor then open his posted Bios and edited both my cards with his setting all but the memory strap settings ( I need to make they sure those setting will work my cards), i set it like it says some place else in this post and in another post on the forums for the memory, both of mine went up to 27 MH all most 28 mh form 26 + MH with Claymore's miner without third party software over clocking it . before I had to use after burner even with Claymore's miner to reach 26 mh  , now i don't have to unless i want the fans under better control and my cards seem to run better cooler etc and use about the same power as before . but I'm still having a few issue finding that sweet spot with sgminer-gm-windows which i would rather use.

cya

top

Would you mind share some advices, details or even better the ROM ? 

got 26.6+220 on 98 at wall

In the 480 Thread a guy has told that he reached 26.8+240 on <100W power usage at wall .
Someone has archived similar results ? In particular i'm interested in Sapphire Nitro+ 470 4gb  

i have tried to push the vram to 2020 but i get blank screen, my stable hashrate 28mhs +300sia at 1950mz vram.
can you share your rom? please

Or more about the ram timings and acceptable Tcase for those timings

Nice overclock by the way - Congrats

This probably says more about RAM cooling than it does about Elpida/Hynix/Samsung performance.
http://www.kitguru.net/components/graphic-cards/zardon/sapphire-rx-470-nitro-oc-4gb-review/2/

Can anyone expain this?
https://15254b2dcaab7f5478ab-24461f391e20b7336331d5789078af53.ssl.cf1.rackcdn.com/ethereum.vanillaforums.com/editor/33/hf9uemj74ex6.png

That GPU1 is saph nitro 4gb elpida with sony87 bios mod.
I think its just that memory controllers have hard errors on them or something?!
It cant be true that the load is 55% and speed is up this much at the same time?

Such a mature reply. I would have lost my shit right there.
Many thanks for all that you do share Eliovp, it helps/means a lot to us even if we don't always say it.

Do those cards make the 24 hour test tho...

Everything is normal in the picture.
Those big numbers are just the auto values

I have this issue with a new build every once in awhile as well and what fixes it 80% of the time is to totally uninstall and reinstall the AMD drivers. Seems sometimes even though the drivers look like they are installed 1 or 2 cards may not quite get to 100% of the way there. This is especially true if you are adding new cards 1 at a time and letting Windows auto-install the drivers for each new card.

The other 20% of the time the issue has been resolved via re-arranging the cards in different slots as Bakery mentioned, simply re-seating the card and power connections (on both ends if modular PS), replacing riser, USB, power cables, or in rare cases the card simply is not capable of running with its peers and needs to have its clocks and voltage brought closer back to default settings..

it ' good .

i have xfx 470 4g

can you send me bios ?/

help thank you