Bitcoin Forum

So I'm gonna purchase a R9 290x and I was wondering if there is any difference between the sapphire/msi/xfx/msi and gigabyte model for mining?

Thanks.  ;)

gigabyte usually works fast without major tuning while sapphire may need oc to reach same khs

don't get xfx, get gigabyte

Sapphire Radeon HD 7950 Graphics Card (3GB GDDR5, DVI, HDMI, 2x DVI)
isnt good this GPU for mining LTC?

People told me to get Gigabyte too but I found out it was one of the slowest at mining.

Sapphire is the fastest in my experience. The people giving you advice probably never tried out any other brands, but for the same exact graphics card, Gigabyte gives very poor performance in terms of mining.

http://t.qkme.me/3srtd0.jpg

I concur with the Sapphire recommendations, both on R9 280x and R9 290.
It isn't that Gigabtye is bad...Sapphire is just better! :-)

Reason? you got to clock the sapphire one more to get as much khash

Saphire is great
the vaphor-x is king trust me
Asus is Very nice the CU II its amazing
Gigabyte sometimes hard to set it good
HIS is prety nice
XFX Run awayyyy

personal opinion.

ASUS Radeon HD 7990 6GB, i headr that this card can run  total 1400kh/s,,is that true?Peoples says it has two cores which run at 700kh/s each core.

have a sapphire 290x running at 880Kh/s :)

From what I've seen sapphire is the fastest.  I have the ASUS and get 880 kh/s though.

I have 5 x Sapphire R9 290's and 1 x Sapphire OC 7970 -- I too prefer Sapphire!

Guys help me build litecoin mining rig under 2000$.advice me with the best choice of computers components.
Motherboard-
GPU-
PSU-
Memory-
Processor-
because i know 7950 perfect but it hard to find and very expensive ,other thing is i dont wanna buy very expensive Motherboard i prefer to buy cheaper and run max 4 gpus on motherboard,and what kind of processor should i buy? Do i need good processor ?do i need much memory ?Is enough like 2 GB for 4 GPUS? Sorry im still noob on litecoins mining hardware

I've got only gigabytes:

r9 280x  ~ 720 kh/s
r9 290   (! without x !) ~ 870 kh/s

Be aware that gigabyte GPUs are voltage locked, so you can't undervolt them directly throught software like trixx, cgminer etc.
However, I undervolted GPU voltage by flashing GPU vBios on r9 280x and instead of 1.2V now runs on 1.075V and it's completly stable.

SAPPHIRE is the best. Veterans say so. Also look for a 7990 if you can get it.


Also try your luck here,
Instructions:

I wouldn't need to undervolt it, if it's electric bill you're talking about, but thanks for the replies  ;)

what are yours opinions of this card?    http://www.ebay.co.uk/itm/Sapphire-Radeon-HD-7950-Graphics-Card-OC-925MHZ-3GB-GDDR5-DVI-HDMI-2x-DVI-/201008920097

What software did you use to do that? And did you overclock core and memory clock?

I havent used anything yet,I just wanna start to build mining rig but before buying stuffes im looking for info i dont wanna buy and throw it away,I just asking would be that card useful ?

Not 290x, but I have 3 280x's.   A gigabyte, an Asus, and a Sapphire.  I've tried everything i can to boost the performance, but I think I'm just about maxed.   Anyway, the Sapphire is the fastest of the 3,  running around 730Kh/s.  the gigabyte and Asus both run around 710Kh/s.   Just thought I'd add that the Sapphires are faster :)

+1...how the hell did you get a gigabyte r9 280x undervolted?   can you provide details?  I've tried to undervolt my cards but no such luck.   I'm pushing 940 watts from my 3 cards, hitting the wall of my 1000w psu.

Can i use different cards ?if yes .would i need install drivers of each card?

I've followed this guide. Step by step, everything worked fine:

http://rumorscity.com/2013/12/09/how-to-modify-video-bios-to-undervolt-gpu-in-linux/

Well my r9 280x is running on this setting. It just gives me best performance:

intensity : 13, thread-concurrency : 11200, gpu-threads : 2, gpu-engine : 1035, gpu-memclock : 1500, gpu-threads : 2

(I don't remember default parameters of GPU, so don't know if I should call it overclock :))

In my experience sapphire 280x's are faster than gigabytes by 20-30kh/s. I've had(have) over 10 sapphire 280x cards, had 6 gigabyte 280s and returned them before all the litecoin/scrypt craziness.

I only have one sapphire 290x, and it does 937kh/s easily. It did so on air reliably at 1025/1500, but under water it manages the same hashrate at 1002/1500. I don't experience any black screens or anything, but it is only one GPU.

It's not just about electric bill. It can also significantly lower temperature of GPUs.

http://www.amazon.co.uk/Sapphire-Graphics-Express-Display-Technology/dp/B00FZLFHEI/ref=sr_1_fkmr0_2?s=computers&ie=UTF8&qid=1388174790&sr=1-2-fkmr0&keywords=R9+290X%2C+100361SR#productDetails

I just bought one, guys if i mess my mining rig ill make good gaming pc  anayway :) what do you think about this card ,is good choice?

It's a very good card, and if you follow my directions with a good TC (1025/1500) you should get around 900kh/s.

Thank you :) next step i got motherboard this one http://www.gigabyte.com/products/product-page.aspx?pid=3891#ov waiting your opinions.