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Author Topic: Comparing the new 7790 to the low wattage 7770s  (Read 11485 times)
FreedomCoin
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March 24, 2013, 05:50:22 PM
 #1

I heard they just released the Radeon 7790 card: http://www.pcmag.com/article2/0,2817,2416925,00.asp

It seems the 250mhash at 138w isnt as good as the 7770 with 200-250mhash at under 100w.

Is there any reason to consider the 7790 for that reason?

Note: it seems toms hardware number are quite different (mhash and wattage) than the mining hardware comparison.

Source: https://bitcointalk.org/index.php?topic=156411.0
https://en.bitcoin.it/wiki/Mining_hardware_comparison

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April 01, 2013, 04:44:53 PM
 #2

thanks for breaking that down jjames888. it should make a good low yield/low power card. I am curious about the new radeons being released in a couple months.. i dont think ill be buying a 7790 as i have 6950s right now for gaming and looking to upgrade to something better. I think ill wait for the new 8 series cards to be released.

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April 02, 2013, 03:06:01 PM
 #3

they released the card a couple days ago.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121727

not sure if $150 is worth it... imo

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April 04, 2013, 01:31:42 PM
 #4

does anyone think the price will drop when Radeon releases the 8 series in Q2 of this year?

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April 04, 2013, 10:58:49 PM
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does anyone think the price will drop when Radeon releases the 8 series in Q2 of this year?

they probably will somewhat.. but then again who knows how much better (if at all) the 8 series will be at mining.

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April 05, 2013, 06:00:36 AM
 #6

cgminer-2.11.3 scrypt

Radeon HD 7770: 204KH/s
Radeon HD 7790: 213KH/s

This card is capable of much more, but there seems to be something in the 7790 driver that auto-throttles it back.  None of the usual tools are currently capable of manual voltage control on the 7790.  Perhaps a future driver or tool will be capable of unlocking this card.

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April 05, 2013, 11:42:17 AM
 #7

does anyone think the price will drop when Radeon releases the 8 series in Q2 of this year?

they probably will somewhat.. but then again who knows how much better (if at all) the 8 series will be at mining.

Agreed, in the same way 5, 6 and 7 series are all perfectly viable for mining and just not as 'dense'. Unless there is a new technology bundled to improve computational power, its unlikely.

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May 05, 2013, 03:03:25 AM
 #8

cgminer-2.11.3 scrypt

Radeon HD 7770: 204KH/s
Radeon HD 7790: 213KH/s

This card is capable of much more, but there seems to be something in the 7790 driver that auto-throttles it back.  None of the usual tools are currently capable of manual voltage control on the 7790.  Perhaps a future driver or tool will be capable of unlocking this card.

I have a Sapphire HD7770

GPU overclock settings in MSI Afterburner:

Core clock: 1179
Memory: 525 (the lowest setting because you don't need it to be any higher and it won't make a diff in hashing power)
power: 0
fan speed: 55%
These setting yield 214-217 Mh/s

I can clock the core at 1200, increase the fan speed to 60-65% and this gets 220 MH/s @ 67C.  But I like the card to run aroud 62C so I keep it at 1179 core.


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