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Author Topic: 7870 and 7850 are here! Anyone bought yet?  (Read 20695 times)
dropt
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March 24, 2012, 09:03:04 AM
 #21

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...
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March 29, 2012, 03:54:59 AM
 #22

bumping from page 2

If I've helped: 1CmguJhwW4sbtSMFsyaafikJ8jhYS61quz

Sold: 5850 to lepenguin. Quick, easy and trustworthy.
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May 15, 2012, 09:43:25 AM
 #23

Anything new?

CrunchingCulture

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July 08, 2012, 03:17:26 PM
 #24

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. Smiley
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July 08, 2012, 06:51:47 PM
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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. Smiley

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

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July 09, 2012, 02:25:53 PM
 #26

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. Smiley
grue
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July 09, 2012, 02:38:40 PM
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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. Smiley
better kernels

It is pitch black. You are likely to be eaten by a grue.

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July 12, 2012, 04:17:39 AM
 #28

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. Smiley
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?

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