SO FRUSTRATED! Please help!

[hksr]

So I've got 3 GPUs running now, one RX580 and two RX570s... specifically:

1x MSI RX580 Armor 8GB
2x MSI RX570 Armor 8GB

I can't get good hashrates out of them for Cryptonight.  I'm at around 1950 h/s combined, so less than 700 per card average.

They're all Hynix memory.  I've bios modded all of them using the UberMix strap:

Good HYNIX ONLY 8gb - models H5GC8H24MJ and H5GQ8H24MJ
777000000000000022AA1C00B56A6D46C0551017BE8E060C006AE6000C081420EA8900AB0300000 01B162C31C0313F17

RX580 bios settings are 1300 core, 2200 mem.
RX570 bios settings are 1150 core, 2150 mem.
All are undervolted -75 mv.

Running the latest Adrenalin drivers.

Using XMR-STAK with Intensity 512, Worksize 4, no CPU affinity.

Rest of my system consists of:
G4400 CPU
4GB DDR4 RAM
120GB SSD
1000W Corsair Gold PSU
Gigabyte GA-H110-D3A MB
Windows 7 Pro 64bit

When I bump up the intensity (which many people have advised to do), I lose 50 to 100 hashes per card. 

One of the 570s is hovering around 600 h/s!  So frustrated!

[treanski]

turned on compute mode?
using 2 gpu threads ?
like this

"gpu_threads_conf" : [
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },

1024/8 is good for rx 580, dont know whats best for 570
pagefile needs to be big enough too

btw this strap sucks, find or buy better one

[hksr]

turned on compute mode?
using 2 gpu threads ?
like this

"gpu_threads_conf" : [
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },

1024/8 is good for rx 580, dont know whats best for 570
pagefile needs to be big enough too

btw this strap sucks, find or buy better one

Is there a compute mode for Windows 7?  I thought it only showed up for Win 10?

Yeah, I've got 2 threads setup.

Any leads on a better strap?

[hksr]

Anybody else with some advice for me?

[hksr]

I give up, increasing intensity just crashes the miner.  I can't get anywhere near 800 intensity, let alone 1000+.

[dragonmike]

Speak to Mattthev, he can sort you out with a better strap.

If tweaking parameters and switching miners (have you tried Claymore and CastXMR?) don't help, it's most likely a bad memory strap. Just get a better one.

[nc50lc]

Anybody else with some advice for me?

The results are quite normal for those cards when mining Cryptonight Coins.
That alogarithm is often optimized for CPU mining.
You can mine them with GPUs but, expect less than mining Ethash.

As far as I know, Cryptonight is good for high end CPU Miners (designed to be "everyone has equal mining opportunity"),
not recommended for a GPU rig.
Better change to another coin using a GPU miner and use a CPU Miner for your CPU to mine that cryptonite coin synchronously.