Quick Clarifications In Regards To Builds
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[quote name=“HopeStillFlies” post=“22536” timestamp=“1374434735”]
Okay, everything is going great. So great I’m scared to screw with it, BUT:1. I’m seeing results in the hardware comparison ranging between 600-700, but I’m topping out at 570 per card by:
Intensity = 20
Engine = 1050
Memory =1400
Powertune = 20
And the little button pressed on the top (looked like some others had theirs pressed, even with those settings put in by hand it didn’t kick to 570 unless the button was pushed - or does it do absolutely nothing?)
I see other metrics like shading, thread concurrency, etc. but I really want to know what that stuff [i]means[/i] before I start randomly plugging in there. What’s the baseline config file for cgminer linux that I can tweak instead of starting with a blank page? Is there any chance someone can paste up one they’ve used for this similar hardware? It’d be nice to have a normal config file anyway; I’m putting all this stuff in by hand each time I boot up in the morning.2. …can I run 6 7950s off this board and power supply? It’s physically possible, but [i]should I[/i]?
[/quote]I’ll address the second point first… Even that monster supply will not run 6 7950’s. Especially when OC’d.
As for point 1, i’m writing up a tuning guide but it a looong way from ready. The little button you speak of has me confused, do you mean the bios switch that switches between BIOS 1 and Bios 2? If so it will do nothing unless you have flashed a new firmware to your card.
Shaders are the number of shaders your card has. For your 7950 its 1792. That’s a fixed number and if left blank CG should autodetect. As for the rest of the settings, have a look here… [url=https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README]https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README[/url]. I think it explains everything nicely but i’m writing a new guide to elaborate and simplify it a bit.
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[quote name=“HopeStillFlies” post=“22536” timestamp=“1374434735”]
Okay, everything is going great. So great I’m scared to screw with it, BUT:1. I’m seeing results in the hardware comparison ranging between 600-700, but I’m topping out at 570 per card by:
Intensity = 20
Engine = 1050
Memory =1400
Powertune = 20
And the little button pressed on the top (looked like some others had theirs pressed, even with those settings put in by hand it didn’t kick to 570 unless the button was pushed - or does it do absolutely nothing?)
I see other metrics like shading, thread concurrency, etc. but I really want to know what that stuff [i]means[/i] before I start randomly plugging in there. What’s the baseline config file for cgminer linux that I can tweak instead of starting with a blank page? Is there any chance someone can paste up one they’ve used for this similar hardware? It’d be nice to have a normal config file anyway; I’m putting all this stuff in by hand each time I boot up in the morning.2. …can I run 6 7950s off this board and power supply? It’s physically possible, but [i]should I[/i]?
[/quote]6x 7950 forget it, that psu is absolutely perfect for running 4x7950 clocked (then you use around 1400w at socket, which is 1120 at dc side).
have the same setup running dead stable with 650khash each.(thanks to nutnut config), at 77degrees in an room with around 30degrees. (high power fans for airflow around cards)Heres my settings:
cgminer --scrypt -w 256 --shaders 0 --intensity 20 -v 1 -g 1 --lookup-gap 2 --thread-concurrency 21712 --gpu-engine 1100 --gpu-memclock 1500 --gpu-memdiff 0 --gpu-powertune 20 --gpu-fan 85 --temp-target 80 --temp-cutoff 90 -o ftc.nut2pool.com:5555 -u x -p x --failover-only -o 192.168.0.2 -u x -p x --api-listen --api-port xxxx --api-allow x.x.x.xDo you use powered risers? with four cards you REALLY should… i have 4 burned mobos to prove it ;)
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[quote name=“svennand” post=“22542” timestamp=“1374437007”]
Do you use powered risers? with four cards you REALLY should… i have 4 burned mobos to prove it ;)
[/quote]VERY good point! See the sticky at the top of this board for a tutorial on making your own if you haven’t already got some.
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if he use 6 its doomed to become barbeque, ive tried both on amd and intel platform, both 68 and 77 chipset++
It gets burned to a crisp. and waranty do not cover it (ive tried), which is kinda stupid since its really a design flaw when the mobo has enough pci-e connectors. -
[quote=NutNut]I’ll address the second point first… Even that monster supply will not run 6 7950’s. Especially when OC’d.[/quote]
So don’t even push 5, just stick with 4?
[quote]As for point 1, i’m writing up a tuning guide but it a looong way from ready. The little button you speak of has me confused, do you mean the bios switch that switches between BIOS 1 and Bios 2? If so it will do nothing unless you have flashed a new firmware to your card.[/quote]
This little blue light off the rgfii’s rig, there’s one per card:
https://forum.feathercoin.com/index.php?topic=2635.0
I did not see any documentation for them.
[quote]Shaders are the number of shaders your card has. For your 7950 its 1792. That’s a fixed number and if left blank CG should autodetect. As for the rest of the settings, have a look here… https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README. I think it explains everything nicely but i’m writing a new guide to elaborate and simplify it a bit.[/quote]
Okay, thanks, I’ll dive right in reading that.
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5 would most likely work for a while… but in the long run things will start to happen. if you use 4 your within limits for 24/365 ;D
If you set thread-concurrency, shaders settings doesnt matter, just look at my config where i put shaders 0.that little blue button is as far as i know the sapphire bost button (for preclocked bios), but i do not use it. i just see wasted power from the leds=P set exactly the gpu/mem clock i want in cgminer.
i have 15 of those 7950’s without the led at 650khash and they run really well without any hitch, also run em with seasonic x1250 (what an wonderfull psu!) -
[quote name=“svennand” post=“22542” timestamp=“1374437007”]
6x 7950 forget it, that psu is absolutely perfect for running 4x7950 clocked (then you use around 1400w at socket, which is 1120 at dc side).
have the same setup running dead stable with 650khash each.(thanks to nutnut config), at 77degrees in an room with around 30degrees. (high power fans for airflow around cards)Heres my settings:
cgminer --scrypt -w 256 --shaders 0 --intensity 20 -v 1 -g 1 --lookup-gap 2 --thread-concurrency 21712 --gpu-engine 1100 --gpu-memclock 1500 --gpu-memdiff 0 --gpu-powertune 20 --gpu-fan 85 --temp-target 80 --temp-cutoff 90 -o ftc.nut2pool.com:5555 -u x -p x --failover-only -o 192.168.0.2 -u x -p x --api-listen --api-port xxxx --api-allow x.x.x.x[/quote]Very cool, thanks. Look to implement this in a bit.
[quote]Do you use powered risers? with four cards you REALLY should… i have 4 burned mobos to prove it ;)
[/quote][quote author=Nutnut link=topic=2323.msg22545#msg22545 date=1374437741]
VERY good point! See the sticky at the top of this board for a tutorial on making your own if you haven’t already got some.
[/quote]Oh, I’m definitely running some. As you see in this thread I ordered them from Benny. No complaints, work excellently.[quote author=svennand link=topic=2323.msg22546#msg22546 date=1374438144]
if he use 6 its doomed to become barbeque, ive tried both on amd and intel platform, both 68 and 77 chipset++
It gets burned to a crisp. and waranty do not cover it (ive tried), which is kinda stupid since its really a design flaw when the mobo has enough pci-e connectors.
[/quote]Okay, so it’s just enough to make me think it but just not doable. Fair enough.[quote]
that little blue button is as far as i know the sapphire bost button (for preclocked bios), but i do not use it. i just see wasted power from the leds=P set exactly the gpu/mem clock i want in cgminer.[/quote]So that’s why I saw results of 20k increase but locked to it. It was/is ignoring my settings? BLAH.
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[quote name=“svennand” post=“22542” timestamp=“1374437007”]
[quote author=HopeStillFlies link=topic=2323.msg22536#msg22536 date=1374434735]
Okay, everything is going great. So great I’m scared to screw with it, BUT:1. I’m seeing results in the hardware comparison ranging between 600-700, but I’m topping out at 570 per card by:
Intensity = 20
Engine = 1050
Memory =1400
Powertune = 20
And the little button pressed on the top (looked like some others had theirs pressed, even with those settings put in by hand it didn’t kick to 570 unless the button was pushed - or does it do absolutely nothing?)
I see other metrics like shading, thread concurrency, etc. but I really want to know what that stuff [i]means[/i] before I start randomly plugging in there. What’s the baseline config file for cgminer linux that I can tweak instead of starting with a blank page? Is there any chance someone can paste up one they’ve used for this similar hardware? It’d be nice to have a normal config file anyway; I’m putting all this stuff in by hand each time I boot up in the morning.2. …can I run 6 7950s off this board and power supply? It’s physically possible, but [i]should I[/i]?
[/quote]6x 7950 forget it, that psu is absolutely perfect for running 4x7950 clocked (then you use around 1400w at socket, which is 1120 at dc side).
have the same setup running dead stable with 650khash each.(thanks to nutnut config), at 77degrees in an room with around 30degrees. (high power fans for airflow around cards)Heres my settings:
cgminer --scrypt -w 256 --shaders 0 --intensity 20 -v 1 -g 1 --lookup-gap 2 --thread-concurrency 21712 --gpu-engine 1100 --gpu-memclock 1500 --gpu-memdiff 0 --gpu-powertune 20 --gpu-fan 85 --temp-target 80 --temp-cutoff 90 -o ftc.nut2pool.com:5555 -u x -p x --failover-only -o 192.168.0.2 -u x -p x --api-listen --api-port xxxx --api-allow x.x.x.xDo you use powered risers? with four cards you REALLY should… i have 4 burned mobos to prove it ;)
[/quote]Copied your settings, removing the failover bits and changing account and pool info where appropriate, rebooted system, now there’s apparently “no screen to be attached matching cgm”. Googled around a bit and tried “alias nrbcm=‘screen -d -r cgm || miner-launcher.sh’” but that didn’t work.
Hard rebooting now -nope. Still nothing.
HOLY SHIT removed the api stuff and it the fans just kicked on and it sounds like a tornado alarm going off in here
Running around 650 a piece and the coolest I’ve ever seen them.
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85% fan speed is high, but seems to be the sweetspot for me at least.
Stable as HELL, and just about cool enough that nothing overheats, even during the day with 30degrees outside and 40 in the room. (cards are around 80degres) -
[quote name=“svennand” post=“24341” timestamp=“1375551720”]
85% fan speed is high, but seems to be the sweetspot for me at least.
Stable as HELL, and just about cool enough that nothing overheats, even during the day with 30degrees outside and 40 in the room. (cards are around 80degres)
[/quote]Yeah, it doesn’t bother me anymore, it was just an initial surprise.