Bitcoin Forum

Hi,
I bought a new gigabyte r9 280x and I started mining. so it was only giving me 580khash/s on ltc mining. So I installed OC Guru II and in it. I changed gpu clock from 1100 to 1050mhz and memory clock was by default 6000 mhz. Now it is giving me up to 730khash/s. But its generating too much temperature. temp is 80c to 83c. Please do tell me if it's normal and I shouldn't be worried. I am really new to this. thank you :)
And also do tell me if this way I am voiding warranty^?

If you have it inside a case then I suggest you open the case and maybe even point a fan into it. The byproduct of mining is coins and heat. Also it does not void your warranty but does wear the card. So when you end up returning the card don't tell them you were mining..  ;)

Heard grumbles about heat issues, there' s another thread on it around here somewhere...

Firsts test with BAMT around 700-750 mh/s stable.

i wonder what fan setup your card has.. reference design ?

I've been hearing alot about issues with the new r9's as far as heat go. If adding airflow and changing the fan profiles doesn't help you may be able to put an different bios on it. I don't have a r9 so I'm not sure but you may even be able to use a 7970 bios with less voltage. Moral of the story... stick to 7950/7970 for mining for now they are basically the same card anyways

I'm getting the same results on Gigabyte R9 280X and downclocking to 1050, but Gigabyte has the best cooling system - my temp is 70-73 C. Also I have PowerColor R9 280X: 1100Mhz/1500Mhz, 750Khash/s. Overheating! 85-90 C. It has a stock AMD cooling system.

I dont get why downclocking is getting more khash/s. But anyways, I get 730kh/s on 80 temp. I am not sure if this will burn the card lol.

IMHO This is probably a motherboard / videocard incompatibility. I just bought cheap Gigabyte motherboard on LGA1155. PowerColor 1100/1500 is showing only 620Khash/s now. Downclocking to 1080 (!) returns performance back to 750Khash/s.

I have the same cards with the same problem.  On slot 1 pci-e 3.0  card runs 12 degrees hotter than the other on pci-e 2.0. Voltage is locked unfortunately. I hope we find a solution soon.

Not instability. Some of the Tahitis (280X, 7970) have shown this before, where there's a specific GPU Clock value to hit peak hash rates, and it isn't the max GPU clock card can handle.

is there any method to unlock voltage?

i have done that with trixx for sapphire. Maybe it will work with your card. My card is Sapphire Vapor-X R9 280x

I need some help with the config. I only get about 560 kh

here my config
cgminer -o stratum+tcp://coinotron.com:3334 -u ** -p ** --scrypt -I 20 -g 2 -w 256 --thread-concurrency 8192
1038 GPU
1500 Mem.

Big Thanks

try lowring the I to 13 cuz you have g to 2

ignored my question eh ?
PS: i already knew the answer anyway i was dropping a hint ;)

bad fan design by me. Lol. So I added a fan and temps dropped from 84 to 74. Is it good enough? :p

Add custom cooling and you should be fine. My 7950s ran fine at 80-84c.

set -I 13. also on your oc software, change clock speed from 1100 to 1050. And my gpu memclock was by default set to 6000. So I left it untouhced. See if that works for you.

Im running 85-90 degrees mining an r9280x. It sucks, but the other option is to not mine  :-[. Hopefully it holds up I heard the cards were Mac trucks when it comes to heat, we shall see.

Nothing wrong with those temps, some of mines are running around 90°C

I set up an domestic ~30cm fan for my 3* R9280X rig, because there is weak ventillation in the place where it stands. For cost of 0,7 kWh/day i have nice 70-72 C temps :) It will become even more important, when I install 4th GPU soon.

i have same gpus with a fan :) good  ;D

flash the bios, the vcore is probably too high

I have 730khs stable - 70 degC - fan at 2000rpm ( it's like 20% - so it's silent).

GPU clock 1035 MHz
Memory - default
Voltage - lowered to 1.1V ( and powertune -20 )

Card is Sapphire R9 280X dual-x OC

Just got the exact same card and has been mining flawlessly now at 712Kh/s for well over 2 hours (cover off PC, no additional fans)

Seems to be a good card for $:hash

Running at default settings but using "--thread-concurrency 8192 -g 2 -w 256 -I 13" on 3.7.2

Very happy so far, not going to OC it any further as I'm NOT running it in an 24/7 AC room

My Sapphire 280x gives 675Khs.I can get more,but heat and wattage goes up and its not worth 35Khs.My temps are 75C,yours are fine.Close to 90C and maybe more is something to worry about.

I manage 755k on my Sapphire 280x Toxic, at 73C with:

--gpu-vddc 1.2 -I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-engine=1089 --gpu-memclock=1500 --auto-fan

why do all same gpus have different hashing speeds.

Not entirely sure, I think it has something to do with the quality of the ASIC chip that is installed

You should get over 700 with every 280x though.

Over 70 °C, my xfx 280x start throtthling (core go up-down from the settled value to 510).
Sholud i flash the bios? I don't have windows, no way to do it on linux?
Where can i find proper tested bios?

You can try atitweak or AMDOverdriveCtrl on Linux.
Although flashing is pretty easy:
http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/

Thank you for this fantastic clue. But i don't know how to properly set the bios, plus by a brief look cannot locate the bios switch on my cards... can't i find a proper bios online?

Everythings explained there.
You download VBE7 and there you can choose your settings in drop down windows.
Also if you can't locate a BIOS switch your GPU only has 1 BIOS.

yep, but i have to mess with vram temperatures right?

You always do, vram is normally the problematic part of the card, since its not usually cover by the cooling system on the card (in some cards it is, such as any Tri-x edition)

If your hashrate jumps down due to temps, its normally vram :(

Its nice to remember old times tho  ;D

Neoscrypt is kikin' ;)

Can you share settings please? Im on windows 8.1 pro latest drivers and a r9 280x as well running on cgminer, so far y just got 75kh...

Cmon thats a huge change! I should be able to get 200 at least right?

Cmon im asking for help here :(

Allright thanks for the start point

You should try 14.6 first and if you have problem then you upgrade to 14.7.