7870 and 7850 are here! Anyone bought yet?

ssateneth

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Quote from: grue on July 09, 2012, 10:38:40 AM

Quote from: thehairymob on July 09, 2012, 10:25:53 AM

WHta is wrong with GUI miner? I have used it for over a year and it has served me well so far. It also is giving me 308mh/s at present with my new card. With extra flags it used to give me 207mh/s on my old hd 6770 which was very good for that card, my son has that one now. Do the other miners offer better than what I presently get? This is why I was looking for extra flags to push the hash rate up. Thank you for your reply and any further info you can share.

better kernels

GUIMiner is just a frontend. It's not a miner. You can plug in the kernel you want (diakgcn/phatk2/opencl/etc) with the miner you want (poclbm/phoenix/etc) and have the same performance as the more popular miners. Some people just don't want all the bells and whistles and stick to what works. Why fix it if it ain't broken?

grue

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Quote from: thehairymob on July 09, 2012, 10:25:53 AM

WHta is wrong with GUI miner? I have used it for over a year and it has served me well so far. It also is giving me 308mh/s at present with my new card. With extra flags it used to give me 207mh/s on my old hd 6770 which was very good for that card, my son has that one now. Do the other miners offer better than what I presently get? This is why I was looking for extra flags to push the hash rate up. Thank you for your reply and any further info you can share.

better kernels

thehairymob

full member

Activity: 152

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WHta is wrong with GUI miner? I have used it for over a year and it has served me well so far. It also is giving me 308mh/s at present with my new card. With extra flags it used to give me 207mh/s on my old hd 6770 which was very good for that card, my son has that one now. Do the other miners offer better than what I presently get? This is why I was looking for extra flags to push the hash rate up. Thank you for your reply and any further info you can share.

scifimike12

sr. member

Activity: 303

Merit: 250

Quote from: thehairymob on July 08, 2012, 11:17:26 AM

I just got a Sapphire HD7850 to go into my new build and was wondering if there are any flags to go with GUI miner yet. The rest of my spec are i7 3770, 8GB memory, and a 60GB SSD for my operating system backed up with a 500GB HDD for storage.

Don't use GUI Miner. Instead use CGMiner or DiabloMiner.

Intensity: 7
Vectors: 1
Work size: 256

thehairymob

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I just got a Sapphire HD7850 to go into my new build and was wondering if there are any flags to go with GUI miner yet. The rest of my spec are i7 3770, 8GB memory, and a 60GB SSD for my operating system backed up with a 500GB HDD for storage.

oldDirty

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roundhouseminer

Anything new?

cmg5461

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bumping from page 2

dropt

legendary

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Quote from: cletus815 on March 23, 2012, 08:41:57 PM

Still haven't been able to undervolt or change the memory speed but I have better power numbers now.

Currently pulling 298W and the system is actually only 71W of that not the 110W as before. I've also found that poclbm is about 5% faster than diablo for me resulting in a new speed of 314Mh each.

Sidenote: I bought 2 different brand 7850's one Gigabyte http://www.newegg.com/Product/Product.aspx?Item=N82E16814125419 and one HIS http://www.newegg.com/Product/Product.aspx?Item=N82E16814161406. The Gigabyte pulls 105W and the HIS pulls 122W. I'm assuming the Gigabyte's HSF design keeps it much cooler resulting in the fan spin much less

Not sure you're losing the power to a faster spinning fan, might be that as temperature increases, resistance increases. Ultimately you need to push a little more current to maintain voltage. I have no actual analytical data to support this for these circumstances, but as far as electronics theory goes...

cletus815

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Still haven't been able to undervolt or change the memory speed but I have better power numbers now.

Currently pulling 298W and the system is actually only 71W of that not the 110W as before. I've also found that poclbm is about 5% faster than diablo for me resulting in a new speed of 314Mh each.

Sidenote: I bought 2 different brand 7850's one Gigabyte http://www.newegg.com/Product/Product.aspx?Item=N82E16814125419 and one HIS http://www.newegg.com/Product/Product.aspx?Item=N82E16814161406. The Gigabyte pulls 105W and the HIS pulls 122W. I'm assuming the Gigabyte's HSF design keeps it much cooler resulting in the fan spin much less

malevolent

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Quote from: demkd on March 23, 2012, 01:03:22 AM

Quote from: cletus815 on March 23, 2012, 12:29:22 AM

to 1050 core (stock 860 on one 975 on the other) with stock memory (1200) and stock voltage (1.138). I'm getting 300Mh out of each with a

Calculated mhs for 7850 @1050 for diablominer is 311mhs. 300 seems ok.

Quote

110 of that is the system itself so Mh/W right now for the cards alone is 3.27.

110? May be you wrong... I have [email protected] + P67 + 8GB +SSD +HDD and total system power on Windows IDLE is 54W from wall (80 gold+ PSU) of course WITHOUT installed videocards.

Depends on the drivers'/miners' cpu usage and the mobo and cpu themselves.

demkd

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Quote from: cletus815 on March 23, 2012, 12:29:22 AM

to 1050 core (stock 860 on one 975 on the other) with stock memory (1200) and stock voltage (1.138). I'm getting 300Mh out of each with a

Calculated mhs for 7850 @1050 for diablominer is 311mhs. 300 seems ok.

Quote

110 of that is the system itself so Mh/W right now for the cards alone is 3.27.

110? May be you wrong... I have [email protected] + P67 + 8GB +SSD +HDD and total system power on Windows IDLE is 54W from wall (80 gold+ PSU) of course WITHOUT installed videocards.

Gomeler

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Quote from: cletus815 on March 23, 2012, 12:29:22 AM

My 2 7850s are setup but testing has been fairly limited. I can only adjust the core clock with the ATI drivers. The newest Afterburner (beta 15) locks up by system right away and I haven't had the time to try out any other versions.

Hopefully I can find a working version so that I can try knocking the memory and voltage down a bit but right now I have both cards clocked up to 1050 core (stock 860 on one 975 on the other) with stock memory (1200) and stock voltage (1.138). I'm getting 300Mh out of each with a total system wattage of 293. 110 of that is the system itself so Mh/W right now for the cards alone is 3.27.

Well fancy that... it looks like Tom's Hardware was in the ballpark on performance for the 7850. If they dropped $50 or so and could clock up to 1.2 GHz on the stock cooler AND achieve ~3-4 MH/w they might be a viable option for myself. That'd put them in HD 5850 territory with much lower power consumption and a warranty to cover another year or so of GPU mining.

Thanks for the results. Please update w/ new numbers if you do find a way to downclock the ram. Also, might be helpful to test with 1 GPU and then 2 GPUs so you can isolate the power consumption better. Just a thought.

DeathAndTaxes

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Gerald Davis

Quote from: cmg5461 on March 20, 2012, 08:13:49 PM

I have a feeling 7970 will reign top tog until the dual GPU card comes out. For the 7 series at least.

That is a bold prediction. The most powerful GPU will be the most powerful GPU.

cletus815

member

Activity: 67

Merit: 10

My 2 7850s are setup but testing has been fairly limited. I can only adjust the core clock with the ATI drivers. The newest Afterburner (beta 15) locks up by system right away and I haven't had the time to try out any other versions.

Hopefully I can find a working version so that I can try knocking the memory and voltage down a bit but right now I have both cards clocked up to 1050 core (stock 860 on one 975 on the other) with stock memory (1200) and stock voltage (1.138). I'm getting 300Mh out of each with a total system wattage of 293. 110 of that is the system itself so Mh/W right now for the cards alone is 3.27.

Xmufa23X

newbie

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I am curious with the 78xx series as well. If anyone has them, please report everything about it.

Mousepotato

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Seal Cub Clubbing Club

ifl

cletus815

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I have two 7850s coming in today replacing two 6870s. I'll try and report back tomorrow on their performance.

FreshJR

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Activity: 65

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Any update?

xtech, did you get yours in and setup?

n4l3hp

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For MH/w, it's gonna be better than 5830 and the 68xx series.

cmg5461

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Quote from: demkd on March 20, 2012, 09:44:32 PM

Calculated hash rate for 7850 is 255mhs on stock clocks.
7870 = 370mhs and both cards worthless as investment like a 79xx series.
I think real hashrate will be identical to calculated values.

The only perk the 7 series has with it is power usage. Other than that, Mh/$ is still 5xxx series. But 7 series are nice to have as future proof. nice warranties too.

Topic: 7870 and 7850 are here! Anyone bought yet? (Read 21076 times)