Okay, I ran the Polaris Bios Editor v1.6.2 'one click timing patch' on my Samsung cards and after flashing them they're now mining at 31 Mh/s!

Thanks guys!!

Thx Doug! Will have a look. And you're right. The micron looks quite good as it is.


Great info. I am going to give it a shot later today. Will update the thread when I have results.

Hi all,

I have a rig with 5 Sapphire RX580 Pulse 8GB cards running. 2 have Samsung memory, 3 have Micron memory.

Without BIOS mod, but memory clock 2100 and core clock 1150 and undervolting (via Claymore), I get the following hash rates:

Samsung: 25-26 Mh/s
Micron: 28-29 Mh/s

Total hash rate around 138 Mh/s. Not too bad I guess, considering the fact I didn't mod the BIOS yet.

The cards draw 115 watt each.

--

How much would I be able to improve the above by modding the memory timings?

Can I just edit straps and flash and expect it to work? Any risk that I run into the 'BIOS signature check' issue (in other words, given my cards and drivers, should I run the pixel clock patcher)? Note: I use Crimson 17.11.1 drivers.

Thx!

I owe you a beer  The new RAM did the job!

Nope I didn't. Just got all the components a few days back, connected everything and that's it.

Could that be it?!
My Ram: Kingston KVR21R15S8/4G RAM 4 GB 2133 MHz DDR4 ECC Registered CL15 DIMM 288-Pin

Ordered a new RAM stick which should arrive today: Crucial DDR4-2133 8GB RAM (which should be UDIMM).

If this is it I'll buy you a beer!

I'm a newbie. Not done any BIOS modding myself yet, but I think that by modifying the BIOS you can change memory timings. You can't do that through MSI Afterburner for example.

An advantage of BIOS modding is also that the modification is on the card itself. You don't have to re-apply them on each boot or if you use your card on another rig.

There's disadvantages as well. BIOS modding must be done very carefully as you may brick your card. And you probably can forget about warranty if you tamper with the BIOS.

Anyway, it all comes down to how much performance you want to get out of your cards and how much hassle you want to go through.

I'm definitely going to try BIOS modding my cards (Sapphire RX580's), but first I'll see how far I can get with Afterburner or similar.

Yup I have connected the PSU to both the 24-pin and 8-pin (CPU).


What makes you think you actually fried your motherboard and ssd?

I have only one PSU (Corsair) and plugged the connector marked with CPU into the 8-pin on the mobo to power the CPU. On the PSU side it goes into the 4+4 connector. Can't really go wrong there in my view.

It may very well be my motherboard. Or memory. Or CPU. I do not have a clue. Later today I get a new RAM stick, hopefully that will resolve the issue. I also have a new CPU and motherboard on the way.

This is my first rig, so it is pretty unknown territory - and first thought was 'I frikkin' destroyed it'. But I try to stay positive for now. If i can't get things to work with even second mobo and cpu and memory I will start to panic.

I found the following:

3 short beeps = Basic memory 64K address check error (long/short...i hear 3 beeps repeatedly)

See: http://ddr4motherboard.com/beepcodes/ASROCK-H110-PRO-BTC+

Is it the RAM then? Or something on the mobo?

Thx! I got a bit further. Made my own chassis speaker from an old motherboard and attached it to the ASRock.

When I power on I hear 3 long beeps, then a pause, then 3 long beeps, etc.

Could it be the RAM?

Hi all,

I'm in the process of assembling a rig with the following components:

MOBO: ASRock H110 Pro BTC+
RAM: Kingston KVR21R15S8/4G RAM
PSU: Corsair RM1000x
CPU: Intel Pentium G4400 3.3 Ghz
GPU: Sapphire RX580 PULSE 8GB (5x)
SSD: Kingston SSDNow A400 120GB

Installed CPU, RAM, 1 GPU via the PCIe 3.0 x16 slot (via powered riser), connected CPU fan, CPU power (8 pin 12V), 24 pin ATX power connector, keyboard, mouse.

The MOBO is places on standoff screws on a wooden shelf.

On 1st power up, the fans start spinning (CPU and GPU), but there's no video signal. No indication the system is actually booting (no lights on keyboard - e.g. numlock)

Even when stripping the system of keyboard, mouse, SSD, GPU (just using the integrated graphics via the VDI port), clearing BIOS, moving RAM to other slot - there is no indication of booting, no POST, nothing. Just the fans spinning.

Tried re-inserting RAM (until I hear a click, pretty sure it is inserted correctly), taking out CPU to check connectors (looks fine to me).

There are some spare components on the way (RAM, CPU and even a different MOBO), but does any one have some suggestion on how to pin this down? I also have a chassis speaker on the way, so that could help me narrow it down to RAM, CPU or MOBO.

But have I overlooked something? Any other things I could try? Also, how sensitive are the components to static electricity? I don't have an anti static wrist wrap, but touch the tap (which should be okay right?) regularly when handling the MOBO and other components.

/Marc

Thx, I also thought of using salt to counter humidity. From what I have read, it should be quite effective. And yeah I know I won't be able to have a 100% up-time. Maybe 90%-95% if I'm lucky.

I'm sure I can find some space to run the rig indoor. Either at work, a friend's place or somewhere else. I'm not quite giving up the outdoor project just yet, as it has some interesting challenges.

Will keep you posted.

Thx, that's a good piece of advice.


I'm actually planning for 5 GPU's, with space for more. But yeah, my first step is to get the rig running...indoor that is.

This is a two-phased project:
1) Get a 5 GPU rig running efficiently (indoor)
2) Have the rig running reliably outside

Step 2 is the most tricky and really about thermal/humidity control. I don't want to spend too much on it and if it is not doable, I will find an indoor solution.

Thanks for the feedback guys!
I realize this is not the easiest of setups. I did find this post here on the forum: https://bitcointalk.org/index.php?topic=76008.0

Maybe I will run some tests with a waterproof box without the rig (but with a heat source) and measure how temperature and humidity evolve over time.

Haven't given up on the idea. Anyway, if you want to follow the disaster unfolding, you can look here: https://cryptocookbook.wordpress.com/2017/12/25/building-a-mining-rig/  

You definitely have a point. However, the alternative is not building the rig (i live in an apartment with little space to spare). Not building is not an option.

I could find some alternative space somewhere in town perhaps, but it's an interesting challenge to build a rig that will run smoothly 24/7 and 365 days a year even though it runs outside. But sure... I may lose my investment if not done properly.

Hi all,

I'm planning to build an outdoor mining rig. Basic idea is to use a waterproof garden storage box, equip it with fans for air in/out and perhaps include a dehumidifier. I live in a wet, maritime climate with generally cool summers and mild winters. The weather is fairly humid and there are considerable amounts of precipitation.

Any feedback on how to handle 1) fluctuating temperatures, 2) humidity and 3) dust? Well, I guess dust should not be a main concern if I use filters and a closed box.

I was thinking to just have the air inlets and outlets and some temperature and humidity sensors to get an idea of how 'box climate' evolves over time.

Any dos and don'ts?

I am a complete newbie, but plan to document the whole project step by step. See https://cryptocookbook.wordpress.com/2017/12/25/building-a-mining-rig/

Cheers,
Marc