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Author Topic: Seeking Advice -Which 7970 to buy now?  (Read 2961 times)
planman
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March 19, 2013, 03:03:47 PM
 #21

Considering you will not be able to miner Bitcoin very much long, at least if you care about making more money then your paying your electric man for the power it eats....   You should be making sure that you are able to mine Litecoin with it well.  In order to that in the most efficient way, its highly advisable to make sure you do not purchase a 7970 that has a bios with locked voltage. 

Yes, some of them can be unlocked - but I wouldn't purchase a card on a "might be successfule".  Many of the newer XFX's are locked.  I have 7 of them that are earlier unlocked versions that all mine over 650 kh/s while undervolted and save a couple, I've had them up to 730 kh/s when I leave them at stock volts. 

Now if I were to start overvolting - who knows where I could end up.  I'll provide two links below that have settings that have been running for 24 hours.  I have recently played with them a little more and they are hashing a little faster now at the same volts.  The temperatures are awesome - but that is due to the fact they are all equipped with Arctic Accelero coolers.  Something else that I highly recommend when scrypt mining since you will find yourself overclocking the memory for max performance unlike bitcoin mining which is not dependent on the memory.

These 7970s in m mind are an unbeatable value in the mining world.  If scrypt mining continues as it should when ASICS take over the bitcoin world due to the difficulty hike, 7970s will be leading the way.

And if for some reason you find yourself getting out of mining all together.  You will have yourself one badass card(s) to game with, or will be extremely easy to sell on the forums, ebay, crigslist, etc.

https://www.dropbox.com/s/0b9apmnawgrg7l0/miner1.jpg

https://www.dropbox.com/s/4mqaftgbj8c6847/miner2.jpg


Thank you! Thank you! Thank you!

This is awesome!!!
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ryantc
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March 19, 2013, 07:10:44 PM
 #22

Considering you will not be able to miner Bitcoin very much long, at least if you care about making more money then your paying your electric man for the power it eats....   You should be making sure that you are able to mine Litecoin with it well.  In order to that in the most efficient way, its highly advisable to make sure you do not purchase a 7970 that has a bios with locked voltage. 

Yes, some of them can be unlocked - but I wouldn't purchase a card on a "might be successfule".  Many of the newer XFX's are locked.  I have 7 of them that are earlier unlocked versions that all mine over 650 kh/s while undervolted and save a couple, I've had them up to 730 kh/s when I leave them at stock volts. 

Now if I were to start overvolting - who knows where I could end up.  I'll provide two links below that have settings that have been running for 24 hours.  I have recently played with them a little more and they are hashing a little faster now at the same volts.  The temperatures are awesome - but that is due to the fact they are all equipped with Arctic Accelero coolers.  Something else that I highly recommend when scrypt mining since you will find yourself overclocking the memory for max performance unlike bitcoin mining which is not dependent on the memory.

These 7970s in m mind are an unbeatable value in the mining world.  If scrypt mining continues as it should when ASICS take over the bitcoin world due to the difficulty hike, 7970s will be leading the way.

And if for some reason you find yourself getting out of mining all together.  You will have yourself one badass card(s) to game with, or will be extremely easy to sell on the forums, ebay, crigslist, etc.

https://www.dropbox.com/s/0b9apmnawgrg7l0/miner1.jpg

https://www.dropbox.com/s/4mqaftgbj8c6847/miner2.jpg


Thank you! Thank you! Thank you!

This is awesome!!!

I have to say that I love the temp of your card.
all my powercolor 7950 reference card are working around 66-68 with under clocking and mining at 520  Undecided

today just saw some powercolor 7970 reference card on sale, 349.99 after 30 rebate, but the heat with single fan........
flound1129
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March 19, 2013, 08:37:22 PM
 #23



I have to say that I love the temp of your card.
all my powercolor 7950 reference card are working around 66-68 with under clocking and mining at 520  Undecided

today just saw some powercolor 7970 reference card on sale, 349.99 after 30 rebate, but the heat with single fan........

What site?

Multipool - Always mine the most profitable coin - Scrypt, X11 or SHA-256!
planman
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March 19, 2013, 09:00:34 PM
 #24

try Tigerdirect.com

They had  a few deals like that yesterday...
ryantc
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March 20, 2013, 03:57:54 AM
 #25



I have to say that I love the temp of your card.
all my powercolor 7950 reference card are working around 66-68 with under clocking and mining at 520  Undecided

today just saw some powercolor 7970 reference card on sale, 349.99 after 30 rebate, but the heat with single fan........

What site?

I found it on ncix.ca don't know about ncix.com

but I was wrong about one thing, the promotion is not a reference 7970, it's a dual fan 7970 and looks nice.
http://www.ncix.com/products/?sku=70111&vpn=AX7970%203GBD5-2DHV3&manufacture=PowerColor&promoid=1323
MKEGuy
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March 20, 2013, 10:49:51 AM
 #26

I may be wrong but I believe those powercolor units are indeed voltage locked.  Weather or not they can be unlocked I do not know.  But unless every single person you read about has been successful unlocking that exact model number, I wouldn't bother with the risk.  I know the $430 MSI card is indeed capable of being undervolted.  I'm sure there have to be some others.

I did a quick search and http://www.newegg.com/Product/Product.aspx?Item=N82E16814103201 is the cheapest one I could find that I believe to be voltage unlocked.  I would however do some more research before purchasing the card because I haven't found it specifically stated yet.  But there was a comment of someone having it overclocked to like  1125/1500+  and I just can't picture that being stable on stock volts.  The thing is it may have a slightly higher then the normal stock volts and that would explain it.  I can't stress how important it is to have the ability to undervolt these cards when it comes to mining and efficiency.  Unless you dont pay the power bill, but if your parents do - do them a favor and undervolt it! lol

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ryantc
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March 20, 2013, 01:06:44 PM
 #27

Unless you dont pay the power bill, but if your parents do - do them a favor and undervolt it! lol

if a card can't be undervolted the temp will goes up quickly and the fan noise........
flound1129
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March 20, 2013, 03:33:15 PM
 #28

I did a quick search and http://www.newegg.com/Product/Product.aspx?Item=N82E16814103201 is the cheapest one I could find that I believe to be voltage unlocked.  I would however do some more research before purchasing the card because I haven't found it specifically stated yet.  But there was a comment of someone having it overclocked to like  1125/1500+  and I just can't picture that being stable on stock volts.  The thing is it may have a slightly higher then the normal stock volts and that would explain it.  I can't stress how important it is to have the ability to undervolt these cards when it comes to mining and efficiency.  Unless you dont pay the power bill, but if your parents do - do them a favor and undervolt it! lol

I have that card, it can defintiely be undervolted. But again I would avoid diamond and newegg is out of stock on it anyways.

Multipool - Always mine the most profitable coin - Scrypt, X11 or SHA-256!
crazyates
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March 21, 2013, 03:16:16 AM
 #29

I did a quick search and http://www.newegg.com/Product/Product.aspx?Item=N82E16814103201 is the cheapest one I could find that I believe to be voltage unlocked.  I would however do some more research before purchasing the card because I haven't found it specifically stated yet.  But there was a comment of someone having it overclocked to like  1125/1500+  and I just can't picture that being stable on stock volts.  The thing is it may have a slightly higher then the normal stock volts and that would explain it.  I can't stress how important it is to have the ability to undervolt these cards when it comes to mining and efficiency.  Unless you dont pay the power bill, but if your parents do - do them a favor and undervolt it! lol
I have that card, it can defintiely be undervolted. But again I would avoid diamond and newegg is out of stock on it anyways.
I have this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439 and it does run at a higher than stock voltage, but it runs at 1100/1500 out of the box.  Shocked Combined with the fact that it can be undervolted, it's pretty sweet.

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nbtcminer
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March 21, 2013, 05:11:06 AM
 #30

+1 for either Sapphire or PowerColour (models with two fans)
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