Hi,
I'm having different hashrates on with same GPU on different PC. I have RX 470 with moded bios and stock hashrate was 580H/s. I'm mining Monero. On other PC that I bought to build mining rig it's only 480H/s. No matter if I use XMR STAK or Claymore it's almost same.
Both mobo has PCIE x16 2.0 (or should have) but the one with lower hasrates is running only on 1.1 x16 and I can't switch it in BIOS since it's OEM one. Also there are different chipsets and CPU. Both has same AMD drivers 17.4.4.
Any idea why is that? Thank you.

Hi,
I want to buy RX 570 with dual bios is there a list or something where I can find which cards have dual bios? I know Sapphire Nitro+ has it and Pulse doesn't have. Do you know other cards with dual bios? Thanks.

Hi,
I'm new to mining. Can you please help me setup mining rig?

I've bought HP DX 2400MT with some Core 2 DUO CPU... When it arrive I will check it, I want 45nm CPU for better cooling.
https://support.hp.com/us-en/product/HP-Compaq-dx2400-Microtower-PC/3658372

• CPU: 45nm Core 2 DUO or maybe QUAD
• RAM: It has 4GB, do I need more?
• HDD: 320GB
• GPU: I'm trying to buy HD 7850, R9 270x and cheap 7770 for start.
  My plan is to change them after, to at least 3x 7850 or better.
• PSU: It has 300w, but I want buy new Zalman ZM700-LX
  Is this enough for 3x 7850 or 3x R9 270x?
• Cooling: I have some 12cm Arctic fans.
  Also I don't know what is CPU cooler, so I will buy some old heatsink if it's not good.
  I'm trying to buy some OC cards with better cooling than reference, I will only put some Arctic MX2 on it, maybe MX4 for the more powerful ones.
• OS: It has Win 7 64bit, is it good or update to Win 10?
• Mining SW: Claymore? I'm using now XMR Stak NVIDIA there is also AMD version, will try anyway.

Will the PSU be enough? Any advices for me?
Is USB 3.0 power riser good or should I use ribbon?
I'm mining with 860m on my laptop now on Minergate XMR+FCN and also with this rig I want too, any advices?

Thank you for any help