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Author Topic: HD7770 & HD7750 mining thread  (Read 41122 times)
FuzzyBear
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February 18, 2013, 10:26:31 PM
 #41

Sorry was a typo getting them round the wrong way.. I have set my 7750 at core clock 900... memory clock 400 I can get down to on MSI Afterburner

Still only runs at 121Mhash average.. but I suppose that all I gonna get out of the card, ty for all your help crazyates least now i using less power with a lower memory clock

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crazyates
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February 19, 2013, 03:35:27 AM
 #42

Thanks for the replies... still can only average 121Mhash on this card... tried the setting you suggested, and played with worksize and intensity a little from the suggestions here https://en.bitcoin.it/wiki/Mining_hardware_comparison but looks like this is possibly the most i can squeeze out of this card for now it seems... set core clock to 800MHz and Memory Clock to 900MHz and power limit + 20% so everything up high... can go higher on core clock and memory clock but tends to crash the card
If you're setting your core to 800, you want your memory at 650. High memory does not translate into higher hasrate, it just means higher temps and higher power consumption.
Ok ty I did not know this... i just assumed u needed to max out the clocks as much as possible... i have set mem clock to 900 and core to 650 and seem to be squeezing out a little extra on the hasrate... will see how it runs for a few hours and if there is any difference... but thank you again for the info and educating me Cheesy
You set your core to 650, and your memory to 800? That is not what I recommended. Bitcoin mining is very calculation intensive, so it requires a high overclock, but it does not require a high memory speed. On my 5870, I ran it with a core OC of 975, and my memory was all the way down to 300. 7xxx cards cannot underclock their memory that low. 7xxx cards can only underclock their memory 150MHz below the core clock.

Thus, when you were running your core at 800, you want your memory at 650. If you're core is set to 650, your memory should be 500. See the pattern?
not true...if you do the msi afterburner OC thing it'll let you set your mem down to 300...so they say but i'm running my 7970 at 1100core and 685mem...can't get it to get lower then that...the slider bar won't go back to the middle but oh well i'm happy with it
Ah yes. I have my 7970 running undervolted at 1050/310 using MSI AB. I was running it at 1200/475 at stock volts, but it pulled too much power. He specifically stated that he was using CGMIner, which sets the card clocks using the built in AMD ADL, which is limited on clocking the memory to -150MHz below core. MSI AB uses unofficial overclocking methods, which are often not noob-friendly, both in the initial setup, and in everyday use.

Sorry was a typo getting them round the wrong way.. I have set my 7750 at core clock 900... memory clock 400 I can get down to on MSI Afterburner

Still only runs at 121Mhash average.. but I suppose that all I gonna get out of the card, ty for all your help crazyates least now i using less power with a lower memory clock
Ah ok, glad you got it working. The lower memory will help with lower power and temps, but it's not exactly a powerhouse for mining. Glad I could help!

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PeanutPower
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March 27, 2013, 02:12:05 AM
 #43

hmm:

Sapphire Radeon HD 7750 Ultimate (fanless) 55W TDP

GuiMiner 2012-12-03 -v -w128 on Win7x64

No OC (800mhz / 1250 mem)

...

117mhash


DiabloMiner:

DiabloMiner-Windows.exe -v 1 -w 256

...

119mhash

DiabloMiner-Windows.exe -v 1 -w 128

...

121mhash

increase clock to 880mhz (+10%)

...

131mhash

PeanutPower
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March 27, 2013, 02:40:51 AM
 #44

my HD7750 runs fine at 150 MHash/s

how Smiley ?
gramma
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March 31, 2013, 05:01:06 AM
 #45

my HD7750 runs fine at 150 MHash/s

how Smiley ?

FWIW, I started playing with OCing today. I'm getting 144 off of my 7750 at 975/800, -v -f1 -w128
(edit: 146-147 @ 995/750. I think I'll let that run tonight, because I don't want to get crazy with this when I am not awake to monitor. I DO use this PC for other things most of the time, so I need to not blow up the card.)

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April 03, 2013, 04:14:22 PM
 #46

My http://www.amazon.com/gp/product/B0079XWPEK/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1&tag=thelinactsho-20 Gets about 133.3 MH/s with bitminter on a core clock of 880 with any of the newer cataylsts I try on ubuntu 12.04.2+.
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April 12, 2013, 01:05:44 AM
 #47

my HD7750 runs fine at 150 MHash/s

how Smiley ?

FWIW, I started playing with OCing today. I'm getting 144 off of my 7750 at 975/800, -v -f1 -w128
(edit: 146-147 @ 995/750. I think I'll let that run tonight, because I don't want to get crazy with this when I am not awake to monitor. I DO use this PC for other things most of the time, so I need to not blow up the card.)


I'm running the ASUS HD 7750 900MHz overclocked to 1000/850 and I'm getting a steady 148.5 MH/s with 49% fan speed and 69 deg C temp

I'm running GUIminer with -v -f 10 -w 128

Its been running for about 2 days and I'm getting about 0.01 BTC/day plus the same in NMC


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April 12, 2013, 01:12:22 AM
 #48

Thanks for the replies... still can only average 121Mhash on this card... tried the setting you suggested, and played with worksize and intensity a little from the suggestions here https://en.bitcoin.it/wiki/Mining_hardware_comparison but looks like this is possibly the most i can squeeze out of this card for now it seems... set core clock to 800MHz and Memory Clock to 900MHz and power limit + 20% so everything up high... can go higher on core clock and memory clock but tends to crash the card
If you're setting your core to 800, you want your memory at 650. High memory does not translate into higher hasrate, it just means higher temps and higher power consumption.
Ok ty I did not know this... i just assumed u needed to max out the clocks as much as possible... i have set mem clock to 900 and core to 650 and seem to be squeezing out a little extra on the hasrate... will see how it runs for a few hours and if there is any difference... but thank you again for the info and educating me Cheesy
You set your core to 650, and your memory to 800? That is not what I recommended. Bitcoin mining is very calculation intensive, so it requires a high overclock, but it does not require a high memory speed. On my 5870, I ran it with a core OC of 975, and my memory was all the way down to 300. 7xxx cards cannot underclock their memory that low. 7xxx cards can only underclock their memory 150MHz below the core clock.

Thus, when you were running your core at 800, you want your memory at 650. If you're core is set to 650, your memory should be 500. See the pattern?
not true...if you do the msi afterburner OC thing it'll let you set your mem down to 300...so they say but i'm running my 7970 at 1100core and 685mem...can't get it to get lower then that...the slider bar won't go back to the middle but oh well i'm happy with it
Ah yes. I have my 7970 running undervolted at 1050/310 using MSI AB. I was running it at 1200/475 at stock volts, but it pulled too much power. He specifically stated that he was using CGMIner, which sets the card clocks using the built in AMD ADL, which is limited on clocking the memory to -150MHz below core. MSI AB uses unofficial overclocking methods, which are often not noob-friendly, both in the initial setup, and in everyday use.

Sorry was a typo getting them round the wrong way.. I have set my 7750 at core clock 900... memory clock 400 I can get down to on MSI Afterburner

Still only runs at 121Mhash average.. but I suppose that all I gonna get out of the card, ty for all your help crazyates least now i using less power with a lower memory clock
Ah ok, glad you got it working. The lower memory will help with lower power and temps, but it's not exactly a powerhouse for mining. Glad I could help!


Crazy - I'm running AB too but it only lets me set 150 below like the other dude said.  How do I get it lower?  or is it b/c I have the 7750?

Rent out your rig for up to 100% more than you can mine http://tinyurl.com/lc5axo2
crazyates
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April 12, 2013, 03:28:10 AM
 #49

Crazy - I'm running AB too but it only lets me set 150 below like the other dude said.  How do I get it lower?  or is it b/c I have the 7750?
https://bitcointalk.org/index.php?topic=111891.0

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sickhouse
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April 28, 2013, 06:05:56 PM
 #50

Recently bought a HD 7770 card, but I never get more than max 200 MH/s, and that's after I've clocked it. I've got another card, HD6970 or 6950 I think and it gets almost twice the speed. What's up with that? Any tips for me to make it run faster? Currently using the flags worksize=128 VECTORS FASTLOOP AGGRESSION=10 WORKSIZE=128 -f 5.

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April 28, 2013, 08:28:01 PM
 #51

Here's why:
http://www.gpureview.com/show_cards.php?card1=675&card2=638

The 6970 has a lot more shader processors, and overall is more than twice the card as the 7770.

You are doing good with the 7770.  Mine I can't overclock more than about 5% before the driver starts crashing, even with tweaking the heck out of it to allow for more power, etc, in MSI Afterburner.  :-(

So I usually get about 180-190 MH/s.

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April 29, 2013, 01:15:15 AM
 #52

I see, cheers for the information. That explains why the card was so cheap Sad Ah well at least it's a boost for my mining! I'm using Asus GPU tweak for clocking and it's pretty good.

Turn off the news and read. Watch Psywar, learn something important about our society and PR, why and how it got started and how it brainwashes you.
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April 29, 2013, 11:11:33 AM
 #53

200 out of a 7770 is pretty good.  Make sure the VRMs stay cool though.

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August 20, 2013, 08:43:24 PM
 #54

Thread resurrection.  Embarrassed

Would have posted sooner but the rules put me off, anyway.. What power draw is everyone averaging for their system with these cards and the intensity values?

I have 2x 7770 and during the heat wave a few weeks back the room would be unbearably hot.
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August 24, 2013, 10:19:31 AM
 #55

It looks like the 7750 is more reasonable than 7770.

I may be able to perform the 150Mh/s as I am able to perform 150Khash/s scrypt mining.

It looks like you have configured something wrong, I only use 895/1295 for it.

HellDiverUK
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August 24, 2013, 09:00:03 PM
 #56

7750 is a good little card, does about the same hashes as a 7770, but a lot cooler and quieter (and no need for a PCI-E power cable). 
Garz
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August 25, 2013, 07:37:13 AM
 #57

7750 is a good little card, does about the same hashes as a 7770, but a lot cooler and quieter (and no need for a PCI-E power cable). 

Same hashes?   Undecided

A single 7770 on intensity 12 manages 150 for me (so not flat out), with two I average 300. What does the 7750 average on same intensity?
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August 25, 2013, 08:33:43 AM
 #58

About the same, 135-140.  Close enough considering how little the 7750 cost.  Plus mine's a low profile card so fits in a smaller case.
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August 25, 2013, 07:26:10 PM
 #59

Not bad, but depends what you paid for them - I picked one up for £25 and the other for £50. That's cheaper than one 7750..  Wink
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August 25, 2013, 07:39:23 PM
 #60

https://bitcointalk.org/index.php?topic=64368.0

This chaps getting ~110 @ I = 12, not really on par with the 7770 tbh.
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