Building computers for profit? Sounds fun AND useful!
To make the experience fit your profile, pick a username and tell us what interests you.
We found and based on your interests.
I bought two PSUs for the rig off Ebay, both 750 watts. One works great (bottom left of photo above), and the other I think has a short. The rig is working nicely, but only 9 of ten cards are running. I am going to try to fix the PSU which doesn't work.
In the meantime, let the cash roll in!
I have been building it for about a month, but the holidays have slowed shipping and some orders did not go through. I am mostly done and will probably finish the hardware tomorrow as that is when I will receive the CPU and the rest of the risers.
First picture I took of it was this:
No risers, no cpu, no cables, no PSU.
I got the risers and made a video for them (I was really excited :D):
I later realized that all the PSUs I needed were OUT OF STOCK. I do have a lot of spare PSUs, 300 watts here, 385 there... What if I could combine them?
I did. Or at least I think I did. I managed to run a GPU from a different PSU then from the rest of the computer with a little hack, and it actually worked. More details on that in a future log. The rig now looks like this:
Haven't mounted the SSD or the PSUs yet... Still need to figure that out.
Create an account to leave a comment. Already have an account? Log In.
really? I will check it out. I don't see why though, I am not using much power for each card.
By the way, I like your profile pic!
Oh man, I packed up my shit about 8 months ago ($3700aud powerbill for the quater) . I started solo mining eth found 8 blocks on 1x r9 380 then never got lucky enough after buying 17+ gpus... + mobos + psus + psus +psus :) then i went to a pool.
back onto the satas.
PCI-e x16 cards can draw up to 5.5A @ 12v (66W) through the PCI-e connector. The sata plugs can only supply 4.5A @ 12v (54W) potentially 34% over draw
pss your i like you pic too
Wow. Mining luck is stranger than I thought.
If the pcie is only made to supply 66 watts, then the 1050 tis I have are DESIGNED to overdraw - they take 75 watts. That's nearly 50% overdraw for sata... What the heck...
So which part exactly would catch on fire first, the PSU or the sata power cables?
https://i.ytimg.com/vi/lBd3QICfQYs/maxresdefault.jpg I was feeding my risers within one and within a minute of me running claymore that was what my connector looked like, thank god it was while I was there. yeh it was the same with the rx 480 being under engineered (pretty sure amd had some legal shit happen)
Yea, I read about the RX 480 power issues, idk about any legal stuff though. I actually started with one RX 480 in my main PC, then I built this rig. I don't have any heat issues so I think I am ok. have been mining over a week and no issues.
They probably underestimated the final power requirement for the RX480 chip when they designed their reference card which is pretty close to their inhouse prototype. Understand that the boards are designed before final chips are programmed/tested in real code and final voltage/frequency characterizations and statistical spread are done, so they can be quite different from simulation etc.
It can draws beyond the *PCIe specs allowed* amount of power from the backplane so cannot be certified. They solved it by reprogramming the VRM by shifting the power drawn to be within specs.
@Dfa Cat: I dislike people spreading FUD when they don't understand the actual details and no "legal shit" happened because it is an engineering standard body. At least no class action suits that I am aware of.
@K.C. Lee I can see that happening in the design. My RX 480 works fine (maybe AMD's did too), but as far as nearly having electrical fires, I don't think @Dfa Cat has been so lucky. So I guess he is careful.
I am not educated too much on the RX 480 power specification thing, so take what I've said with a mountain of salt.
Personally, I don't typically dislike people unless they've got serious ethical issues. Spread the love....
If the fire starts at the PCIe connector, then it is actually PCIe power compliance issues. The temperature rise vs contact current rating is the reason why the "75W" limits exists from the card edge connector. If the fire starts elsewhere, then blame it on the part that actually fails.
People put a lot of faith on a $1 worth of cable for a $500-$1000 GPU. If you use them outside of what their *original* intended use i.e. running HDD, you won't go too far. They barely do what they are supposed to do - as commodity Chinese made cable adapters tend not to follow their ratings to the actual standards. Copper are too expensive these days.
Nice rig, i really "digg it" :D
AFAIK, the hack for connecting different PSU would bo to make them share the ground connection from poth PSU's so that nothing explodes. Correct me if I'm wrong, I've been kinda rusty with electronics lately :P
Become a member to follow this project and never miss any updates
Those sata to pci-e are a BAD idea, fire waiting to happen