Best r9 280x - page 3. | Bitcointalksearch.org

Shenrox

member

Activity: 140

Merit: 10

Quote from: epicjim on January 08, 2014, 03:24:55 PM

Gigabyte R9 280x Rev2 is best. It produces 730k/s while its undervolted to 1.075V at 64C . Sapphires and other makes are power hungry. No other make can come close to Gigabyte version.

LOL, what settings are you using at 1.075V?
Iv'e only managed to get 680Kh/s max, but mine is on 1.131V. When i had it stock 1.2V it barely reached 600Kh/s
Thanks

Sophokles

hero member

Activity: 1232

Merit: 516

Quote from: epicjim on January 17, 2014, 06:03:03 PM

Quote from: ?? on ??

Quote from: epicjim on January 16, 2014, 03:31:58 PM

Quote from: ?? on ??

Sapphire Radeon R9 280X Dual-X been better than my gigabyte
saphire 750khs 1.025v much cooler than Gigabyte R9 280x Rev2
gigabyte cant get voltage below 1.07, hash only 735khs

and my sapphire finds somehow 25% more shares than GIgabyte

Is your Sapphire Dual X stable on that 1.025 voltage with 750kh? I doubt it is. If you flash Gigabyte R9 280x Rev 2 it can get below voltage 1.07 but its not stable. (or i havent find right settings to make it so)

gigabyte is flashed, it carshes while under 1.07v

sapphire is stable at 754khs 1.024V 1080/1500 weeks online with those settings,
if lover anything below 1.024 it crashes once or twice aday
it can go even to 0.950 but there is no sense, it crashes about after 30minutes
sapphires power usage is 30w less than gigabyte

and best thing, it finds allways more blocks than gigabyte

See I was kinda impressed with your results until your last sentence which jeopardized your entire post.
Finding blocks are direct relationship with your khash rate. And you said "Sapphire finds 25% more shares then Gigabyte". wtf? How is 750 kh is 25% more then 730kh? Are you fail at math?

You might get higher khash setting with some settings but your comments on trashing other r9 280x's are simply BS.

Finding blocks is in direct relationship with work utility, not hashrate. Plus, there is statistical variation. So it would be interesting over which timespan the one card had 25% more accepted shares than the other.

Wipeout2097

sr. member

Activity: 840

Merit: 255

SportsIcon - Connect With Your Sports Heroes

Quote from: epicjim on January 16, 2014, 03:31:58 PM

Quote from: ?? on ??

Sapphire Radeon R9 280X Dual-X been better than my gigabyte
saphire 750khs 1.025v much cooler than Gigabyte R9 280x Rev2
gigabyte cant get voltage below 1.07, hash only 735khs

and my sapphire finds somehow 25% more shares than GIgabyte

Is your Sapphire Dual X stable on that 1.025 voltage with 750kh? I doubt it is. If you flash Gigabyte R9 280x Rev 2 it can get below voltage 1.07 but its not stable. (or i havent find right settings to make it so)

He's not claiming high core clock speed. If the voltage regulators are robust, vDrop is not too steep, ASIC quality is high and the ram is low latency, one can get 750 at such low voltage, yes. Even I managed 750 Kh/s on my shitty VTX3d for a few minutes at core 1050 - 1080 (?), vram 1800, 1.03v

Gazza1

full member

Activity: 238

Merit: 100

Stay away from Sapphire until the get the overheating VRMs under control, if they bother to do it at all.

epicjim

newbie

Activity: 24

Merit: 0

Quote from: ?? on ??

Quote from: epicjim on January 16, 2014, 03:31:58 PM

Quote from: ?? on ??

Sapphire Radeon R9 280X Dual-X been better than my gigabyte
saphire 750khs 1.025v much cooler than Gigabyte R9 280x Rev2
gigabyte cant get voltage below 1.07, hash only 735khs

and my sapphire finds somehow 25% more shares than GIgabyte

Is your Sapphire Dual X stable on that 1.025 voltage with 750kh? I doubt it is. If you flash Gigabyte R9 280x Rev 2 it can get below voltage 1.07 but its not stable. (or i havent find right settings to make it so)

gigabyte is flashed, it carshes while under 1.07v

sapphire is stable at 754khs 1.024V 1080/1500 weeks online with those settings,
if lover anything below 1.024 it crashes once or twice aday
it can go even to 0.950 but there is no sense, it crashes about after 30minutes
sapphires power usage is 30w less than gigabyte

and best thing, it finds allways more blocks than gigabyte

See I was kinda impressed with your results until your last sentence which jeopardized your entire post.
Finding blocks are direct relationship with your khash rate. And you said "Sapphire finds 25% more shares then Gigabyte". wtf? How is 750 kh is 25% more then 730kh? Are you fail at math?

You might get higher khash setting with some settings but your comments on trashing other r9 280x's are simply BS.

Silvano

member

Activity: 98

Merit: 10

Quote from: PhattyBanks on January 16, 2014, 09:35:23 PM

Quote from: G K G on January 16, 2014, 07:21:00 PM

Any one using sapphire vaporX doing 730+ stable? mine does only 720-730

what firmware is yours on? mine does 755k but it has the 39 firmware

actually you can find only fw41, and for what i know, this fw is worse than older

PrintMule

hero member

Activity: 980

Merit: 500

FREE $50 BONUS - STAKE - [click signature]

I've had best experiences with MSI and Gigabyte so far. Tri-fan solutions manage to get better temps, if the card size is not of concern to you.

PhattyBanks

hero member

Activity: 644

Merit: 500

Quote from: G K G on January 16, 2014, 07:21:00 PM

Any one using sapphire vaporX doing 730+ stable? mine does only 720-730

what firmware is yours on? mine does 755k but it has the 39 firmware

G K G

sr. member

Activity: 280

Merit: 250

Any one using sapphire vaporX doing 730+ stable? mine does only 720-730

suchnoob

full member

Activity: 224

Merit: 100

Quote from: mrmork666 on January 08, 2014, 11:04:55 AM

Will buy 2* cards and a 750w psu

lmk your opinions

I highly advise you to buy at least a 850W PSU. If you want your PSU to last more than 1 month.

How to choose a (<1000W) PSU for mining:
PC power consumption * 1.6 = PSU W

epicjim

newbie

Activity: 24

Merit: 0

Quote from: ?? on ??

Sapphire Radeon R9 280X Dual-X been better than my gigabyte
saphire 750khs 1.025v much cooler than Gigabyte R9 280x Rev2
gigabyte cant get voltage below 1.07, hash only 735khs

and my sapphire finds somehow 25% more shares than GIgabyte

Is your Sapphire Dual X stable on that 1.025 voltage with 750kh? I doubt it is. If you flash Gigabyte R9 280x Rev 2 it can get below voltage 1.07 but its not stable. (or i havent find right settings to make it so)

cozk

hero member

Activity: 812

Merit: 500

Quote from: Prelektro on January 08, 2014, 12:09:23 PM

i would go for asus 280x. toxic is hard to cool and getting really hot and noisy

lol @ people considering noise to be a factor when choosing a mining graphic card.

goldbars

newbie

Activity: 14

Merit: 0

Quote from: Freekje on January 15, 2014, 11:46:28 PM

my 4 vapor-x's run at 1.1v resulting in 720-735KH/s pulling 1060W from 2 mobo's: so including 2*mobo/cpu it's at 2.72kh/w

I get about the same for 4 asus oc r9 280x pulling about 1000w-1025w and about 10.2 amps total

Amph

legendary

Activity: 3248

Merit: 1070

Quote from: Gazza1 on January 10, 2014, 02:14:53 AM

The Toxic 280x can run 800kh/s. voltage is locked though, have to tweak the bios with vbe7

setting for 800?

i'm at 750 with 1000mv core

Freekje

full member

Activity: 154

Merit: 100

my 4 vapor-x's run at 1.1v resulting in 720-735KH/s pulling 1060W from 2 mobo's: so including 2*mobo/cpu it's at 2.72kh/w

G K G

sr. member

Activity: 280

Merit: 250

I think MSI's Gaming3G is good. My buddy has 1 giving a stable 750+kh/s
I use 2 sapphire-VaporX R9 280x, each give only about 720kh/s

Gazza1

full member

Activity: 238

Merit: 100

The Toxic 280x can run 800kh/s. voltage is locked though, have to tweak the bios with vbe7

cozk

hero member

Activity: 812

Merit: 500

Quote from: rwessels on January 09, 2014, 12:40:25 PM

Quote from: epicjim on January 08, 2014, 03:24:55 PM

Gigabyte R9 280x Rev2 is best. It produces 730k/s while its undervolted to 1.075V at 64C . Sapphires and other makes are power hungry. No other make can come close to Gigabyte version.

Did you flash the bios to unlock this card? I have like 8 of these and have no control over the voltage in Afterburner. Many of the newegg reviews also say the card is locked.

You need to bios mod it.

Easy, follow crypto badge's guide. (google it)

rwessels

member

Activity: 102

Merit: 10

Quote from: epicjim on January 08, 2014, 03:24:55 PM

Gigabyte R9 280x Rev2 is best. It produces 730k/s while its undervolted to 1.075V at 64C . Sapphires and other makes are power hungry. No other make can come close to Gigabyte version.

Did you flash the bios to unlock this card? I have like 8 of these and have no control over the voltage in Afterburner. Many of the newegg reviews also say the card is locked.

psybase64

newbie

Activity: 56

Merit: 0

mmininginc - I have the ASUS R9 280x DC2 and 100% happy with it.
Like claygraffix I get 750kH/s with it. (undervoltaged + increased the engine clock with 80MHz)
But what I really like about this card is its superb and silent cooling system.

claygraffix - I have 4x ASUS R9280X-DC2-3GD5 3GB GDDR5 DVI-I DVI
All at 750kh/s on stock settings, 69-71 deg. Going to buy 4 more soon.

Prelektro - i would go for asus 280x. toxic is hard to cool and getting really hot and noisy

I agree with these guys.

Running 6 x Asus R9 280x with two more arriving any day now.

745khs out of the box on stock. Voltage is unlocked so you Undervolt to save power and heat which lowers fan noise as well.

Don't recommend the Sapphire Radeon R9 280X Dual-X as they throttle at 72c or something silly.

Go with the ASUS, you wont regret it. I haven't

Topic: Best r9 280x - page 3. (Read 14522 times)