Quote from: Talan on June 10, 2016, 01:33:36 PM

Quote from: Marvell1 on June 09, 2016, 08:25:00 PM

Quote from: onemd on June 09, 2016, 05:57:35 PM

Quote from: Marvell1 on June 09, 2016, 12:34:03 AM

Quote from: citronick on June 08, 2016, 12:47:26 PM

Heliox - just to update that I managed to get the -175mV working on the new batch of Nanos.

I have not got all 6 cards in a complete setup yet, but testing on 1 card is a success.
I will run it overnight before flashing the other cards.
I will report the kill-lo-watt meter readings tomorrow morning.

As of now, with -175mV rom:
-6mV,1040/300 = 30.3MHs at fans= fix 60%, temps 67-68c
and
stock -175mV,800/300 = 22.4MHs, temps 62-63c, auto fans

I am tempted to try the -200mV rom.

Is it normal that some rigs will have 150 roms and some 175 roms, mixed configs in your environment?

how do you guys mnaage to raise the core on the modded rom cards ? i have several -175 six card rigs and th seccnd i change to core from 800 to even 950 the box crashes

In Windows, you can use the MSI afterburner to raise/reduce the core voltage. The memory voltage is not changeable.

Read my post i said i tried that and it box crashes whenever i change the core from the 800 to anything higer

windows 10, even with a clean install same thing happens.

Hi Marvell,

I had exactly the same problem. Reason is that some of your nanos cannot cope with -175mv while some can.

I had 6 nanos shipped from Amazon and I made the mistake that I applied the same rom to ALL of them. However, each card is different. I even was very unlucky, and had one card that even cannot cope with a -100mv mem voltage! Hence my rig always crashed when increasing the core speed. Unfortunately I also used this gpu when I only tested with one nano...

Therefore my recommendation:
- Test each nano separately and see what mem voltage it does not crash with when you increase the core speed and start the mining

I had the following results:
GPU 1: -100core/-75mem: -100mem lets the system crash. Currently I manually reduce the core clock to -100 (there is only one -75/-75 rom here)
GPU 2: -175 mem
GPU 3: -175 mem
GPU 4: -150 mem
GPU 5: -70core/ -150 mem: Claymore's miner shows a lot of invalid shares for this gpu. I increased the core clock and now it's better though there are still some invalid shares from time to time
GPU 6: Dead - getting replacement

Some other issues: when running headless, max 640x480 resolution when using vnc. Had to purchase a dummy plug. Now it works.

I'm thinking of reducing further the core clocks (except GPU5), but first I want to run this rig for some days to see its stability.

Hope this helps! And Helios, great job! Looking forward to your other roms.

Cheers,
Talan

thanks fr the info all my nanos are the xfx cards excet fr a few asus and saphire here and there what youre saying makes sense all the nanos run the 175 mod fine as lng as i dont touch the clocks and the further accet anther -12 mv undervolt all this is fine right now for the summer 23.6 mhs eth and 1200 dcr at 130 watts at summer elecrtic prices works well for me in the winter when its cooler and electrcity is cheaper ill take your advice and figure out what mod i can use that wil alowe for higer core clocks