Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs

[Zedster]

made that change, now reaper.exe closes instantly when I open it

Edit: was using reaper v12, changed to v13b4 seems to be working

Quite a bit of slowdown in windows, what is the closest setting to intensity for bitcoin?

LTC tips for the help!

Like taco said But i have run at 12 to use my comp so it may vary

[klear]

Intensity/aggression 13 or 14 is best if you still want to use the computer

People who have pmed me, I'm sick w flu, will get back to you soon

thanks taco! whats your LTC address?

[ronaldinho_07]

anyone can tell me the power consumption of HD5850 when mining ltc ?

[Nolo]

Like it has previously been stated in this thread, I can't get my 7970 to run in Reaper with thread concurrencies of 20992, 21712, or 24000 and lookup gap set to 2.  Reaper just crashes immediately.  Thoughts?

[tacotime]

thanks taco! whats your LTC address?

LiK1rotC2tNYNRbRfW2xsKLYJvKhQ3PwTN

[tacotime]

anyone can tell me the power consumption of HD5850 when mining ltc ?

depends on volts/clocks.  stock it should be the same as the tdp.

[tacotime]

Like it has previously been stated in this thread, I can't get my 7970 to run in Reaper with thread concurrencies of 20992, 21712, or 24000 and lookup gap set to 2.  Reaper just crashes immediately.  Thoughts?

what error does it give?  OS, driver/sdk versions?  reaper version?

[420]

What should I overclock a 6950 to?

what ratio is the memory supposed to be from the core clock

[tacotime]

I run my 6970 at 915 MHz with a ratio of 0.8

[420]

I run my 6970 at 915 MHz with a ratio of 0.8

saphirre trixx sucks balls

whenever i set manual fan control it changes for a few seconds to my trixx setting then it reverts back to the cards default setting

what would that make your memory clock?

i took core*0.8 * 2 (ddr effective rate?) and got 1464 if thats your mem clock then using that ratio doesn't get me any more khash than the stock ratio of memory to gpu which is 800/1250 = 0.64

[Radacoin]

tacotime, thanks for this guide!!

I tried mining with my 7970, but I can't make more than 550kH/s (with core:1050, mem:1600). I've tried reaper and cgminer with tons of different configurations.

I use Windows7 x64 and Catalyst 13.1 - might this be a problem? Should I use Linux? A different AMD driver?

[philips]

RAM REQUIREMENTS ON-MOTHERBOARD
The equivalent amount of system RAM as for the sum of all the vRAM used by the GPUs is required when mining with reaper.  For instance, 3x 5970s mining with thread_concurrency values of 8000 each would require 3x 500MB = 1500MB system ram (plus additional RAM for the OS).  The memory requirements for 7xxx cards are also higher because of larger thread_concurrency values, for instance a thread_concurrency of 24000 means 1.5GB system RAM per card is required.

You shouldn't need a lot of RAM for cgminer, it offloads it to the GPU unlike reaper which for some odd reason keeps it in the system RAM.  reaper is coded really sloppily while cgminer is pretty immaculate.

So I am trying to figure out how much memory will I need for two rigs, mining only with cgminer:

First rig:       4 x 5870 and 1 x 6990 with 2GB RAM already on the motherboard
Second rig:  4 x 7970 ......................with 2GB RAM already on the motherboard

Can you give me an estimation?
Thanks.

[tacotime]

I run my 6970 at 915 MHz with a ratio of 0.8

saphirre trixx sucks balls

whenever i set manual fan control it changes for a few seconds to my trixx setting then it reverts back to the cards default setting

what would that make your memory clock?

i took core*0.8 * 2 (ddr effective rate?) and got 1464 if thats your mem clock then using that ratio doesn't get me any more khash than the stock ratio of memory to gpu which is 800/1250 = 0.64

915 MHz / 0.8 = approx 1150 MHz
I think I get like 20-30 more kh/s at 1350 MHz, at the expense of more heat

[tacotime]

tacotime, thanks for this guide!!

I tried mining with my 7970, but I can't make more than 550kH/s (with core:1050, mem:1600). I've tried reaper and cgminer with tons of different configurations.

I use Windows7 x64 and Catalyst 13.1 - might this be a problem? Should I use Linux? A different AMD driver?

As it says in the guide, use a ratio of 0.57

1050 MHz core / 0.57 = ~1840 MHz RAM clocks; you are only using memory clocks of 1600 MHz.  The only way you can hit 1840 MHz RAM is by overvolting the RAM in afterburner.

Try instead 950 MHz core / 0.57 = ~1670 MHz RAM clocks, you should get over 550 KH/s with less heat

[tacotime]

RAM REQUIREMENTS ON-MOTHERBOARD
The equivalent amount of system RAM as for the sum of all the vRAM used by the GPUs is required when mining with reaper.  For instance, 3x 5970s mining with thread_concurrency values of 8000 each would require 3x 500MB = 1500MB system ram (plus additional RAM for the OS).  The memory requirements for 7xxx cards are also higher because of larger thread_concurrency values, for instance a thread_concurrency of 24000 means 1.5GB system RAM per card is required.

You shouldn't need a lot of RAM for cgminer, it offloads it to the GPU unlike reaper which for some odd reason keeps it in the system RAM.  reaper is coded really sloppily while cgminer is pretty immaculate.

So I am trying to figure out how much memory will I need for two rigs, mining only with cgminer:

First rig:       4 x 5870 and 1 x 6990 with 2GB RAM already on the motherboard
Second rig:  4 x 7970 ......................with 2GB RAM already on the motherboard

Can you give me an estimation?
Thanks.

2GB for the first rig is fine as long as you are only using cgminer.
With the 7970s, you're going to want to use reaper to achieve the highest hash rates at the lowest possible power consumption.  You will need ~1.5 GB * 4 = 6 GB + 1 GB system = 7 GB RAM minimum.  Although, you can use 2 GB and cgminer if you want, I just overall much prefer reaper for 7xxx series.  8 GB of RAM is only $40 now, so.

[philips]

OK Taco, thanks a lot.

With 7970 I achieved around 565 Kh/s with cgminer. I will try reaper if needed.
8GB, got it.

[Radacoin]

As it says in the guide, use a ratio of 0.57

I used the exact same settings as in your screenshot (core:1015, mem: 1760, same litecoin.conf), but I only get ~430kH/s with Reaper.

Which version of Reaper are you using?

[420]

that 0.57 ratio at stock only seemed to net me 1 or 2 more khash if cgminer is displaying right

[malvino]

Hi to all!

I'm trying to mine Litecoins but I don't know what I'm doing wrong. I have a 7850, windows 7 and reaperv13beta4_64.

reaper.conf
kernel reaper.cl
save_binaries yes
enable_graceful_shutdown no
long_polling yes
platform 0
device 0

mine litecoin

litecoin.conf
host litecoinpool.org
port 9332
user user.1
pass 1

protocol litecoin

worksize 256
vectors 1
aggression 18
threads_per_gpu 1
sharethreads 16
lookup_gap 2
gpu_thread_concurrency 16384

And this is waht happens:



Any help?

Thanks!

[Bitinvestor]

Remove "vectors 1" and try again.