Topic: HD 6770 - page 2. (Read 6848 times)
You will likely have to unlock afterburner with the EULA config mod. After that do as suggested and lower memory clocks as low as possible(start with 600). This lowers power consumption and reduces heat. This can usually be done without exiting the mining program, just check it before you leave. One of my cards does 970 and the other does 1010 happily.
I just committed a major boo-boo... crashed the card... Thank God I didn't scorch it lol... really... don't... know what I'm doing... lol 
Underclock the snot out of the RAM for lower temps and zero affect on performance.
Just guessing off the top of my head I'm thinking:
920Mhz for core clock
1300MHz for mem clock
Sound like a good starting point?
EDIT ::
920 & 1300 got me up to 140MH/sec, which is almost even with the "stock" GTX-580... So I guess I just keep on tweaking it upward...
This does make me kind of nervous though lol, cuz I'm a n00b to overclocking. How do I know the "red zone" at which I could damage my hardware?
920Mhz for core clock
1300MHz for mem clock
Sound like a good starting point?
EDIT ::
920 & 1300 got me up to 140MH/sec, which is almost even with the "stock" GTX-580... So I guess I just keep on tweaking it upward...
This does make me kind of nervous though lol, cuz I'm a n00b to overclocking. How do I know the "red zone" at which I could damage my hardware?
I've never really been into over-clocking... I've always left my hardware at manufacturer settings for a few reasons:
1) long lifespan and resale value
2) I'm a DirectX dev and need to test on "stock" hardware -- which most people are running
3) system stability
4) etc, etc...
So this is a new challenge for me. Should I tamper with Afterburner as my mining app is running, or is it necessary to shut it down, change settings and try again?
Also, could you tell me how you have yours clocked so I can copy your profile and test it?
1) long lifespan and resale value
2) I'm a DirectX dev and need to test on "stock" hardware -- which most people are running
3) system stability
4) etc, etc...
So this is a new challenge for me. Should I tamper with Afterburner as my mining app is running, or is it necessary to shut it down, change settings and try again?
Also, could you tell me how you have yours clocked so I can copy your profile and test it?
I haven't done the math in awhile, but I believe they're still the most efficient cards I run and the fact that they only use one PCIe connector is a plus. The only downside is that they offer relatively low hashes while using a PCIe slot on your mobo. A slot that could be taken by a 79xx, 59xx, or 58xx.
6770's will do over 200 with mild overclocks. I operate two Sapphire 6770's and both exceed 200MH/s. One does 1020 core @ stock voltage. Just fiddle with them awhile till you find the right overclock. You want them right on the edge of instability.
Oh, ok... I thought those stats on the page were for right out of the box, not over-clocked.
Should I use Afterburner?
6770's will do over 200 with mild overclocks. I operate two Sapphire 6770's w/ bASIC-MINING and both exceed 200MH/s. One does 1020 core @ stock voltage. Just fiddle with them awhile till you find the right overclock. You want them right on the edge of instability.
Ok, that works... Now GUIMiner shows me a new GPU device named "Juniper"...
But... It's only pushing about 127.5MH/sec???
The mining hardware comparison page said this thing should hit over 220MH/s.... which is the only reason I bought the damn thing... If it's only capable of 127 then it was a total waste of money and I'll need to go return it immediately.
This is actually slower than my GTX-580...
But... It's only pushing about 127.5MH/sec???
The mining hardware comparison page said this thing should hit over 220MH/s.... which is the only reason I bought the damn thing... If it's only capable of 127 then it was a total waste of money and I'll need to go return it immediately.
This is actually slower than my GTX-580...
I'm gonna shut down, remove my GTX-580 and try the 6770 solo to see what happens... 
http://www.guru3d.com/articles_pages/his_radeon_6770_iceqx_turbo_crossfire_review,1.html Crossfire for mining, I wouldn't. If you don't crossfire you will still need a dummy plug.
Yes, I've heard about the multitude of mixed-GPU problems... and this is my first time doing it... 
How about this... Would TWO of these HD 6770s setup in "Crossfire" mode out-perform my GTX-580 in gaming? Because I'll go buy another one today and do it in a heartbeat; would give me both a bad ass game development rig and a decent miner with low power reqs.
How about this... Would TWO of these HD 6770s setup in "Crossfire" mode out-perform my GTX-580 in gaming? Because I'll go buy another one today and do it in a heartbeat; would give me both a bad ass game development rig and a decent miner with low power reqs.
You will need a dummy plug and welcome to the world of mixed GPUs. You can make one pretty cheap. I would put it on the Nvidia and the monitor on the AMD and see if mining works.
http://www.overclock.net/t/384733/the-30-second-dummy-plug
http://www.overclock.net/t/384733/the-30-second-dummy-plug
First tried my HDTV w/ HDMI connected to the card, then switched my actual monitor over... still no change -- the 6770 is not detected by GUIMiner and I can't get any other miner to work. I can't even mine Litecoin on my GTX-580 anymore with cgminer. Only thing that works is CPU mining or GTX-580 mining with GUIMiner.
Now I'm also seeing some queer things... when I start Windows a lot of programs are just crashing for no reason now. WTF!!!
Now I'm also seeing some queer things... when I start Windows a lot of programs are just crashing for no reason now. WTF!!!
I dunno if I have a dummy plug... Well, I'm sure I do but it's buried under tons of fossilized computer parts (like DDR RAM chips and CRT monitor adapters lol).
But that does make sense, and I'll bet you're right. I'm sure switching my TV's HDMI cable to the 6770 would have the same effect? And if that doesn't work try switching my monitor to the 6770?
I tested my game engine against the 6770 and it says there's nothing wrong with it... My engine has what's called a HAL (Hardware Abstraction Layer), and I ran the implementations based on DXGI (DirectX Graphics Infrastructure) 1.0 and 1.1. Not only can it detect the card but my code can read all of its CAPs -- from amount of VRAM to VendorID. I didn't try but I'm also quite positive it would be trivial to run compute shaders or PhysX on it. So I firmly believe I've installed the card properly...
I'll try these recommendations and report back with the results...
Thanks,
--ATC--
But that does make sense, and I'll bet you're right. I'm sure switching my TV's HDMI cable to the 6770 would have the same effect? And if that doesn't work try switching my monitor to the 6770?
I tested my game engine against the 6770 and it says there's nothing wrong with it... My engine has what's called a HAL (Hardware Abstraction Layer), and I ran the implementations based on DXGI (DirectX Graphics Infrastructure) 1.0 and 1.1. Not only can it detect the card but my code can read all of its CAPs -- from amount of VRAM to VendorID. I didn't try but I'm also quite positive it would be trivial to run compute shaders or PhysX on it. So I firmly believe I've installed the card properly...
I'll try these recommendations and report back with the results...
Thanks,
--ATC--
also it looks like he installed not 11.12, but 12.10 (or something like that), judging from the amd app version.
Dunno why your 6770 isnt detecting. I got 32 gpus spread across 6 rigs and they all mine. Using 11.12 or 12.1 driver, ATI Stream SDK 2.1 installed in addition to whatever sdk is normally installed with those drivers. I select "gpu-platform" : 1 in my config file, uses the older faster sdk, mines away happily.
But I'm also not using any nvidia. Try just the 6770.
Dunno why your 6770 isnt detecting. I got 32 gpus spread across 6 rigs and they all mine. Using 11.12 or 12.1 driver, ATI Stream SDK 2.1 installed in addition to whatever sdk is normally installed with those drivers. I select "gpu-platform" : 1 in my config file, uses the older faster sdk, mines away happily.
But I'm also not using any nvidia. Try just the 6770.
So the Runtime is installed. Sounds like a driver issue?
Another random thought. I doubt very many headless rigs are running the 12.11 beta (which you said you installed), so maybe you need a dummy plug with that driver version? Try plugging an old/spare monitor into the 6770.
Another random thought. I doubt very many headless rigs are running the 12.11 beta (which you said you installed), so maybe you need a dummy plug with that driver version? Try plugging an old/spare monitor into the 6770.
lol
The 11.12 driver I was telling you about can be found here: http://support.amd.com/us/gpudownload/windows/previous/11/Pages/radeon.aspx?os=Windows%20Vista%20-%2064-Bit%20Edition&rev=11.12
Open up a cmd prompt and run "cgminer.exe -n". You need 2 main things installed, a driver and an OpenCL runtime. Just installing the driver thru device manager will not install a runtime (or SDK). Device manager will tell you what driver you're using, and that command will tell you what runtime you have available.
Open up a cmd prompt and run "cgminer.exe -n". You need 2 main things installed, a driver and an OpenCL runtime. Just installing the driver thru device manager will not install a runtime (or SDK). Device manager will tell you what driver you're using, and that command will tell you what runtime you have available.
LOL! Ok, I used ATI's auto-detect driver installer tool... then I reboot my system and fire up GUIMiner... Now it shows my Intel i7 processor as a selectable device for mining; whereas before it only showed my GTX-580! Dunno why on earth installing ATI drivers for this HD 6770 would suddenly make GUIMiner detect my CPU but NOT the new GPU... WTF LOL!!!!
BTW, I'd actually prefer to use CGMiner over GUIMiner... I've used it for Litecoin mining before. As a matter of fact, I had my own batch file to run it and mine Litecoin on my GTX-580... But since I've installed this HD-6770 that suddenly stopped working. When I try to run the batch file ("Launch_LTC.bat") CGMiner just immediately returns and the console closes. Same thing if I click on cgminer.exe.
This is some weird stuff...
BTW, I'd actually prefer to use CGMiner over GUIMiner... I've used it for Litecoin mining before. As a matter of fact, I had my own batch file to run it and mine Litecoin on my GTX-580... But since I've installed this HD-6770 that suddenly stopped working. When I try to run the batch file ("Launch_LTC.bat") CGMiner just immediately returns and the console closes. Same thing if I click on cgminer.exe.
This is some weird stuff...
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