Need advice on a rig

[kalnas]

I don't know your budget, but at least have 2 or more cards per setup. At least a HD 5870, HD 6950 or HD 6970 for starter cards. Ideally, HD 5970, 6990, 7950, 7970, 7990, R9 270X, R9 280X, R9 290 and/or R9 290x. Unless your going to CPU mining, at least a low power dual CPU. If a high end CPU and CPU mining, then a low end Core i7 or AMD 8 core FX series. Minimum 8GB RAM, 16 GB suggested if more than 2 GPU cards.

Does 8 -> 16GB actually make any difference? I'm running 4x 280x at around 720kh each with 8GB

Nope
4GB is enough for gpu mining.

[1715420928]

1715420928

[1715420928]

1715420928

[1715420928]

1715420928

[Jollyburner]

I don't know your budget, but at least have 2 or more cards per setup. At least a HD 5870, HD 6950 or HD 6970 for starter cards. Ideally, HD 5970, 6990, 7950, 7970, 7990, R9 270X, R9 280X, R9 290 and/or R9 290x. Unless your going to CPU mining, at least a low power dual CPU. If a high end CPU and CPU mining, then a low end Core i7 or AMD 8 core FX series. Minimum 8GB RAM, 16 GB suggested if more than 2 GPU cards.

Does 8 -> 16GB actually make any difference? I'm running 4x 280x at around 720kh each with 8GB

what kind of power supply you have for 4X 280x? and is that 720khs Stock Hash or Overclocked?

you want either a huge fully modular 1300w (ish) or 2x 750w modular with 2x pcie 8pin/6pin connectors (4 total) single rail psu

jump the green wire to any black wire on the 2nd psu's 24pin atx connector to trick it into thinking the system is on. power both psu's on at same time, then boot rig. run any HDD from the same psu as connected to mobo.

power pcie risers from the same psu as the 8/6 pin pcie power is coming from for each card.

you will need powered pcie risers for > 2 cards, you will want powered risers for all but 1 of your cards, this will prevent any loopback through the pcie bus.

be sure the risers are the kind with the power wires cut which lead back to the mobo, see example here:
http://forum.feathercoin.com/index.php?topic=2193.0 - [Guide] Homebrew powered risers.

most of the recommended suppliers of pcie risers will have this done correctly.

[MEPHuk]

Ok, change of plan, i am possibly gonna be purchasing http://www.digitalpromo.co.uk/amd-fx8320-8core-35ghz-socket-am3-16mb-cache-retail-boxed-processor-p-6962.html and http://www.amazon.co.uk/Sapphire-GDDR5-Retail-Pci-E-Graphics/dp/B00FOQZZAK/ref=sr_1_1?s=computers&ie=UTF8&qid=1388469555&sr=1-1&keywords=280x. I am hoping to be cpu coin mining from 6 of the 8 cores, (may do 7 cores), and also gpu mining as well. What sort of k/h rate will i be looking at, because i cannot make heads nor tails of the hardware wiki page (identical model numbers, same core clock and mem clock yield different k/h rates).

Thanks in advance

MEPH

[Jollyburner]

Ok, change of plan, i am possibly gonna be purchasing http://www.digitalpromo.co.uk/amd-fx8320-8core-35ghz-socket-am3-16mb-cache-retail-boxed-processor-p-6962.html and http://www.amazon.co.uk/Sapphire-GDDR5-Retail-Pci-E-Graphics/dp/B00FOQZZAK/ref=sr_1_1?s=computers&ie=UTF8&qid=1388469555&sr=1-1&keywords=280x. I am hoping to be cpu coin mining from 6 of the 8 cores, (may do 7 cores), and also gpu mining as well. What sort of k/h rate will i be looking at, because i cannot make heads nor tails of the hardware wiki page (identical model numbers, same core clock and mem clock yield different k/h rates).

Thanks in advance

MEPH

you will be around 710-740 / 280x depending how good it is, if your lucky, higher. sapphire card should do 720+ with same settings u see on that hardware wiki. TC 8192 or 11200 works best for me.

[MEPHuk]

Ok, change of plan, i am possibly gonna be purchasing http://www.digitalpromo.co.uk/amd-fx8320-8core-35ghz-socket-am3-16mb-cache-retail-boxed-processor-p-6962.html and http://www.amazon.co.uk/Sapphire-GDDR5-Retail-Pci-E-Graphics/dp/B00FOQZZAK/ref=sr_1_1?s=computers&ie=UTF8&qid=1388469555&sr=1-1&keywords=280x. I am hoping to be cpu coin mining from 6 of the 8 cores, (may do 7 cores), and also gpu mining as well. What sort of k/h rate will i be looking at, because i cannot make heads nor tails of the hardware wiki page (identical model numbers, same core clock and mem clock yield different k/h rates).

Thanks in advance

MEPH

you will be around 710-740 / 280x depending how good it is, if your lucky, higher. sapphire card should do 720+ with same settings u see on that hardware wiki. TC 8192 or 11200 works best for me.

Thanks for the reply, any idea what i should be pulling in for the cpu ?

MEPH

[Jollyburner]

Ok, change of plan, i am possibly gonna be purchasing http://www.digitalpromo.co.uk/amd-fx8320-8core-35ghz-socket-am3-16mb-cache-retail-boxed-processor-p-6962.html and http://www.amazon.co.uk/Sapphire-GDDR5-Retail-Pci-E-Graphics/dp/B00FOQZZAK/ref=sr_1_1?s=computers&ie=UTF8&qid=1388469555&sr=1-1&keywords=280x. I am hoping to be cpu coin mining from 6 of the 8 cores, (may do 7 cores), and also gpu mining as well. What sort of k/h rate will i be looking at, because i cannot make heads nor tails of the hardware wiki page (identical model numbers, same core clock and mem clock yield different k/h rates).

Thanks in advance

MEPH

you will be around 710-740 / 280x depending how good it is, if your lucky, higher. sapphire card should do 720+ with same settings u see on that hardware wiki. TC 8192 or 11200 works best for me.

Thanks for the reply, any idea what i should be pulling in for the cpu ?

MEPH

no idea whatsoever. best guess 40. that is based on 0 experience and is completely a guess based on how much my NVidia/i5 setup changes w cpu on while scrypt mining. cpu mining may not even be measured in KH/s, I wouldn't know. gl 

[MEPHuk]

Ok, thanks for the reply

MEPH

[MEPHuk]

Bump, still hoping someone can give me another rough estimate for my cpu

MEPH

[kalus]

https://litecoin.info/Mining_hardware_comparison

[MEPHuk]

https://litecoin.info/Mining_hardware_comparison

That doesnt have the cpu on its list

MEPH

[efx]

Ok, change of plan, i am possibly gonna be purchasing http://www.digitalpromo.co.uk/amd-fx8320-8core-35ghz-socket-am3-16mb-cache-retail-boxed-processor-p-6962.html and http://www.amazon.co.uk/Sapphire-GDDR5-Retail-Pci-E-Graphics/dp/B00FOQZZAK/ref=sr_1_1?s=computers&ie=UTF8&qid=1388469555&sr=1-1&keywords=280x. I am hoping to be cpu coin mining from 6 of the 8 cores, (may do 7 cores), and also gpu mining as well. What sort of k/h rate will i be looking at, because i cannot make heads nor tails of the hardware wiki page (identical model numbers, same core clock and mem clock yield different k/h rates).

Thanks in advance

MEPH

you will be around 710-740 / 280x depending how good it is, if your lucky, higher. sapphire card should do 720+ with same settings u see on that hardware wiki. TC 8192 or 11200 works best for me.

Thanks for the reply, any idea what i should be pulling in for the cpu ?

MEPH

Should be getting around 60 kh/s @ ~ 4.1-4.2 ghz when you utilize 8 threads. In my experience, there's no real reason to leave a core idle, the speed decrease from loading all cores is minimal to non-existent on this arc, possibly because it's still not utilized as effectively as it could be by the majority of CPU miners.

[MEPHuk]

So the 60 k/h, thats total i am guessing ?

MEPH

[efx]

So the 60 k/h, thats total i am guessing ?

MEPH

Yes, this 8 physical integer core arc does best executing 8 threads.

https://litecoin.info/Mining_hardware_comparison

That doesnt have the cpu on its list

MEPH

The 8320 is simply a lower verified clock 8350. Same silicon, tons of headroom. Often, they aren't even lower bins (relative quality rating of the chips) than the 8350's. The vast majority are capable of 5 ghz + when installed in a decent motherboard and OCed by someone who knows what their doing.

[MEPHuk]

Thanks again for the reply. What i meant by the 60 k/h total, i meant cpu AND gpu ? Sorry, still relatively new to all this

MEPH

[Kenshin]

So the 60 k/h, thats total i am guessing ?

MEPH

i7 will give you 640KH/s when mining 8 thread and Quarkcoin.

That is what I got anyway.

[MEPHuk]

Ok, thanks for the reply, they are all giving me good info

MEPH

[mayhui]

find a deal because prices on video cards have been going up.