What CPU flavors are in each machine?
The fast one is i7-870 and the slow one is Core 2 Duo e7300 but I overclocked FSB to 320Mhz so now it's 3.2GHz. Also it's using only DDR2 800Mhz but now they are overclocked too I can't lower clock in BIOS... hate that OEM crap. The slow PC is OEM HP DX 2400... but I don't think it's CPU problem usage is very low usually lower than 20% and clock speed is only about 2.4GHz (Intel Speedstep). | Slow--------------------- | Fast | | Core 2 Duo OC 3.2GHz | i7-870 3.5GHz auto OC to 3.6GHz I think | | Asus IPIBL-LB (OEM HP) | Asus p4p55d-e | | DDR2 4GB | DDR3 8GB | | 850W | 500W | | Windows 10, 17.4.4 | Windows 10, 17.4.4 | | PCIE x16 1.1 | PCIE x16 2.0 |
GPU is RX 470 Asus Strix 4GB with modded bios, all drivers patched. Same pool, same wallet. Edit: the slow one is using Windows 10 Creators update... |
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If the software is exactly the same, the problem is obviously in hardware.
A couple ideas:
- Now enough PCIE lines on the motherboard (switch them to gen1 could help)
- Weak PSU that results in reducing power limit of GPU's
Sorry I should point out I have Corsair RM850i only this 1 GPU right now. Not even 200W usage, Corsair link says 150W. It's running in 1.1 x16. I can't switch PCIE to anything in BIOS it's pure OEM HP, didn't find any unlock or something. So I guess I need new mobo? Thanks for help. |
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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.
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Yeah that's really bad.
In CZ they only have the cheapest and the most expensive cards. The XFX black edition cost here 320 bucks... Only reasonably priced RX 580 4GB here are Gigabyte Gaming, MSI Armor and Sapphire Pulse... for about 240. Any idea which one is better? Does Pulse use same memory as Nitro+?
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Pulse OC has Dual Bios
Are you sure? I was looking on youtube unboxing and there is no switch on Pulse OC. Nitro+ has it. The RX 5xx series is still unavailable in Czech Republic, only some of them are in stocks. So price are higher, Nitro+ 4GB cost same as ASUS RX 480 Dual 4GB I'm not sure if it worth to buy 570 over 480. I read that Asus RX 480 dual isn't good in overcloking and doesn't have dual bios. Is it worth to buy RX 5xx series? The RX 470 cost more than RX 570 here. What brand can you recommend me please? Thanks. |
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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.
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I'm buying now R9 380x for 120 USD. So I will have R9 380 and R9 380X, I'm thinking about third GPU of RX 470, 480 or 570... Or can you recommend me some good GPU with same price tag? Thanks. Sorry for quoting, but I can't figure out how to tag here by username... |
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I was using these adapters years ago  I'm not in the UK, I'm from Czech republic, but I can buy this same PSU for same price here. I suppose my IT knowledge is no longer actually useful Are Arctic fans still good? I have them for years and they are still pretty good silent, or are you recommending another case fans? What about thermal compound? I have plenty of Arctic MX-2 and little bit of MX-4 are those good enough? Thanks. |
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That Corsair is a good PSU, I would not hesitate to use it myself. However, that PSU only has 4 PCIE connectors and the Sapphire R9 380 4GB Nitro takes 2 6 pin PCIE connectors per GPU, so the max would be just 2 of that video card. The 380 has a tdp of 190 watts, so you may be able to use 3 on a 850 watts PSU; depending on the CPU, hard drive(s), fans etc, you would probably draw ~750 or less at the wall. If you do some undervolting of the GPUs it would be less watts and allow your PSU to operate at a better load (making it last longer). Ok. I could use Molex to 8 pin PCIe or SATA to 8 pin PCIe or you don't recommend me this? There should be 2 SATA and 2 Molex cables with 4 connectors each. I could use one of them to connect third GPU or this is not using anymore? Thank you. |
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My experience:
For XMR cpu mining is far and away more profitable in large part due to stability. GPU mining had the benefit of flexibility in that you can switch coins; however, CPU mining has the stability rivaling an ASICS. My 32 cpu opteron c7000 blade chassis has been running 24/7 under max load since August 2016. Zero crashes. My GPU rigs I restart weekly.
Oh ok. Well, electricity is no problem for me now. Should I restart PC every week? I will use GPUs mostly. I still don't know what CPU is in that PC I hope for 45nm Core 2 DUO, HP says PC can run Core 2 Quad 2.66Ghz, but on mobo specs it says Q9xxx so it could be 3.16GHz. But I'm worry about heat so I think it would be more wise use 65W Core 2 DUO than 95W QUAD. I have i7-870 and that beast is powerful CPU but also good oven. Chieftec is by and large poor quality and unlikely to provide it's rated watts (or die quickly if worked hard). I don't know about MS-Tech, but usually cheap price is a bad sign for a PSU. Zalman makes some decent products and I think that model would be a safe buy. For a rig that is going to be mining 24/7 you will save money in the long run by buying a Gold or Platinum rated PSU. The efficiency isn't as big of a deal for general use with a few hours gaming, but for 24/7 mining under heavy loads the extra efficiency does make a difference.
Today I've bought R9 380 Nitro 4GB for 120 USD. What PSU I need to run 2 of these and 1 less powerful GPU? And what PSU for 3 of these? What do you think? Thank you guys for advices, very helpful for me. |
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Thanks guys, I really appreciate your advices. So what would you recommend me as sufficient PSU? I'm about to buy 3x R9 380 or 2x R9 380 and one 270x or 7850. Will this Chieftec 750W PSU be enough for 3x R9 380? In CZ we have this one for very good price. Or I need 850W? I found this cheap MS-Tech 850W PSU but it doesn't have very good reviews. MS Tech also have 950W PSU for almost same price, but that seems pretty weird... Or should I buy better and more expensive one? I had really good experience with Seasonic but only 500W. Or something like Corsair? Thank you very much. EDIT: Maybe this ZALMAN 850W, little bit expensive but still good price and seems pretty nice build quality, they also have 3 year warranty. |
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If you will buy new gpus anyway why don't you just buy the rx series , why hd and r9s they are not power efficient i don't recommend them if your electricity price isn't very cheap, you can buy 3 rx 470 4gb and 700 watt psu will do fine , maybe a mobo with 3 x 16x pcie and forget this raisers , just mount your gpus directly onboard , any cheap cpu will do fine , and 4gb of ram is ok.
Also: you don't need all that hdd space
Thank you, well I don't pay for electricity, it's in the rent no limited for me, it's students flat. Yeah I could buy some new cards, but it cost a lot for start. I have money to buy them, but I just wanna try it with some older and cheaper setup and if it's gonna work for me I will buy new ones. I've read that it isn't good having more GPU in x16 PCIE on mobo because of heat. The 320GB HDD is already in the PC, I have no idea if it's SATA ATA or whatever will see once it arrive. PC I've boughtAlso what you think about mining merged cryptocurrencies? XMR+FCN Thanks. |
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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  |
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