Safe HD7950 bitcoin mining.

[Madpacket]

Don't bother with BTC mining at this point, go with LTC and trade for BTC as it's worth 2.5-3.0 times BTC at this point when you figure out how much you can mine on your card. You need ASICS to mine BTC at this point to really make it worth it like Balla mentioned.

Also, with the rate of electricity you're paying don't mine at 950mhz, push that w*ore to at least MHz and up the voltage, you will mine at a much at faster rate.

FWIW, I've been mining for 15 months on 2 overclocked 7970's 24/7/365 without issues, mind you these are on cards are using volterra VRM modules so YMMV with the new aftermarket cards.

 

[BallaTheFeared]

Something seems off...

According to your screen (and I could be wrong) but you're drawing 195w~ on that card and according to mine at the same clocks I'm pulling 144w~.

 

[wbynum]

With BTC going up and LTC stabilizing, LTC is no longer worth 2.5 - 3 times. It's at ~1.6 times currently. Of course that is still a good percentage.

 

[DerekZ06]

@ Wbynum Your tip on turning the intensity to 9 has really helped!! I'm averaging 550 now!

Something seems off...

According to your screen (and I could be wrong) but you're drawing 195w~ on that card and according to mine at the same clocks I'm pulling 144w~.

No doubt, I don't understand it. I set my afterburner to the same settings as you, besides the ram, I can't go that low and be stable.

I was thinking maybe it could be that the current sensor is miscalibrated. But then I notice that I have a larger VDDC voltage drop when I have it set to the same target voltage as you. Which supports that it really is taking more current. It also has a slightly higher temperature with the aftermarket TIM.


EDIT: BTW, are you also using the HIS iceQ Turbo cooler? I notice that at 63% fan speed, mine is spinning at 2667 RPM. While yours is spinning at 2988 RPM.

EDIT2: So I just found out about this ASIC quality thing. Mine's only 55.8%. Damn.

 

[philipma1957]

@ Wbynum Your tip on turning the intensity to 9 has really helped!! I'm averaging 550 now!




No doubt, I don't understand it. I set my afterburner to the same settings as you, besides the ram, I can't go that low and be stable.

I was thinking maybe it could be that the current sensor is miscalibrated. But then I notice that I have a larger VDDC voltage drop when I have it set to the same target voltage as you. Which supports that it really is taking more current. It also has a slightly higher temperature with the aftermarket TIM.


EDIT: BTW, are you also using the HIS iceQ Turbo cooler? I notice that at 63% fan speed, mine is spinning at 2667 RPM. While yours is spinning at 2988 RPM.

EDIT2: So I just found out about this ASIC quality thing. Mine's only 55.8%. Damn.

yeah that is a bad number i have some in the 90%

 

[BallaTheFeared]

Nope mine is the TF3, and this one has an ASIC of 56.1% - Pretty much all boost cards have low ASIC scores - I wouldn't read too much into it.

I dunno if it will help you or not, but my kill-a-watt should be here tomorrow. Maybe I can figure out how close gpuz actually is. :\

 

[DerekZ06]

Nope mine is the TF3, and this one has an ASIC of 56.1% - Pretty much all boost cards have low ASIC scores - I wouldn't read too much into it.

I dunno if it will help you or not, but my kill-a-watt should be here tomorrow. Maybe I can figure out how close gpuz actually is. :\

If you could do that that would be great. After this weekend I should also have a kill-a-watt meter to compare with.


I did read into the the whole ASIC thing a bit. Basically I understood that if it is kept cooler, it can overclock better than high scoring ones. So I took the graphics card apart again to put some more of that coollaboratory liquid pro on the die because I felt like maybe I had it spread to thin. I also found I had 8 ram heatsinks laying around, so I put them on the VRM's on top of it's existing VRM heatsink, or what I would like to call "heat plate". After it was all done, I decided to bump the fan speed up to 74% and try for higher clocks again. I also ordered 20 additional ram heatsinks for 8 bucks.

This is where I'm at now:

That 19amp power draw is a little worrying if accurate, but the 12V line is drooping a lot lower than usual. Temps seem great.

 

[BallaTheFeared]

You have enough juice left you could probably hit 1200.

 

[Greyfairtayle]

hey derek I have a question:

I do have the same gpu, and does your last setting run steady ?
I´m only hitting 420 (stock) mhash ...

and really nice temperature !!! Mine is about 70 C°+... (modified cooler ???)

 

[Silverforce11]

Don't bother with BTC mining at this point, go with LTC and trade for BTC as it's worth 2.5-3.0 times BTC at this point when you figure out how much you can mine on your card. You need ASICS to mine BTC at this point to really make it worth it like Balla mentioned.

550Mha/s gets around $8-9 a day at these prices, and its going up so fast.

OC 7950 can hit that easy at 1.1ghz.

If you are at work, leave it on mining, at home, play some games for a few hrs, then go to sleep, again leave it on mining. Even if uptime is not 100%, you earn >$5 a day, or ~$150 a month. One month is a long time with all the price fluctuations, but really, 1 month of 7950 working, its less than half priced.. or at the rate BTC is skyrocketting, one month of mining on 7950 would end up paying for itself. hehe

 

[Greyfairtayle]

550Mha/s gets around $8-9 a day at these prices, and its going up so fast.

OC 7950 can hit that easy at 1.1ghz.

If you are at work, leave it on mining, at home, play some games for a few hrs, then go to sleep, again leave it on mining. Even if uptime is not 100%, you earn >$5 a day, or ~$150 a month. One month is a long time with all the price fluctuations, but really, 1 month of 7950 working, its less than half priced.. or at the rate BTC is skyrocketting, one month of mining on 7950 would end up paying for itself. hehe

seriously? 1,1 GHz ?!?!!?

please tell me your config, otherwise can´t believe u, but prove me wrong ()

 

[GlacierFreeze]

550Mha/s gets around $8-9 a day at these prices, and its going up so fast.

How much Mha/s would 2x 7790s get? Or would it be better to get 1x 7950? Either would be about $300.

 

[BallaTheFeared]

Kill-a-watt is telling me 243w total system (not monitor) when mining at 1050/900, idle is around 74w.

TPU says 11w for idle, so let's assume 63w is not the gpu, 243 - 63 = 180w

GPUz is showing 11.88v 12.2a, so 145~ watts, seems to be off. CPU usage isn't a factor it's downclocking and pretty close to idle.

Edit: Herp derp, that's at the wall, HX850 PSU... If I'm not going balls out anymore, I should probably consider a more efficient lower power unit >.<

If JG has anything to say, it seems to be around 90% efficiency with this type of draw.

 

[Silverforce11]

I noticed while mining core 0 of the CPU is loading at around 50%, which prevents CPU downclocking, its at 3.3 to 3.7 ghz.. total system power of around 250W is about right, from the wall.

 

[BallaTheFeared]

Hum, I don't seem to have that issue.

Usage for me is around 4%, stays downclocked for the most part expect a few x12 bumps every once in a awhile.

Oddly GPUz jumped to 12.8A, but the kill-a-watt didn't change at all 242-245w fluctuation.

 

[powersirj]

i am using 2 7870, when i adjust the memory to a lower freq it still stays at 1500..i cant get it to go lower even after i adjust the slider to a lower frq and hit apply in AMD vision control...any suggestions i have tried MSI afterburner, same thing

 

[thujone]

seriously? 1,1 GHz ?!?!!?

please tell me your config, otherwise can´t believe u, but prove me wrong ()

my 7950 is a bit too loud to mine at 1100... but i get 550 mhash running at 1050mhz.