4 sp120 corsair air series high proformance on push pull.. and another 120 attached the the back of my motherboard blowing on the socket and have my h100i blowing the exhaust in on the VRM

That explains things a lot. That is a lot of air moving across the AIO. And blowing directly on the VRM's help immensely too. I keep contemplating pulling the radiator back out and installing the stock Corsair fans. Maybe next cat hair cleaning with the compressor.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

So, I'm back. Whoever warned me against the Rosewill power supply, the cheap one, you were correct. I just replaced it with an EVGA Supernova 1200 P2. Newegg couldn't replace the Rosewill (thankfully) so they refunded the price; $120 US. The new PSU cost $250 US. On the bright side; It didn't take any components with it...

Ha Ha. That would have been me. Sorry to rub it in. I thought that the specs and reviews looked mighty iffy. Glad when it went it didn't take anything along with it. I think you will be happy in the long run with a quality power supply, you usually get what you pay for in this world.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

So, I'm back. Whoever warned me against the Rosewill power supply, the cheap one, you were correct. I just replaced it with an EVGA Supernova 1200 P2. Newegg couldn't replace the Rosewill (thankfully) so they refunded the price; $120 US. The new PSU cost $250 US. On the bright side; It didn't take any components with it...

Ha Ha. That would have been me. Sorry to rub it in. I thought that the specs and reviews looked mighty iffy. Glad when it went it didn't take anything along with it. I think you will be happy in the long run with a quality power supply, you usually get what you pay for in this world.

HA! No hard feelings. I knew something was up (I could smell it throughout the house)and opened my case and the smell hit me. It was still running but, just as I shut it down a puff of smoke was released just as the fan stopped. Too funny and lucky.

Watt for Watt, the EVGA is heavier and looks and feels as though it is built better than the Rosewill. I hope I don't need another for a very long time.

Peace and good luck crunching.

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So, I've un-tweaked everything to reduce power consumption and to keep the load off of my PSU. I think I'll leave it this way for a while. My RAC will never get back to where it was but, I may save some component wear and tear.

Can anyone tell me why two R9 280X devices will draw 80 to 90 amps? This is what is happening according to GPU-Z when everything is set at full throttle. Clocked back and resources adjusted, I have it down to 40 to 60 amps.

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AMD graphics cards have always been power hungry. Especially compared to the latest Nvidia Maxwell cards which are power misers in comparison. Plus AMD cards are just better math crunchers compared to Nvidia, so they work harder yet are more efficient overall with respect to generating RAC. I'm guessing GPUZ shows amp draw for AMD cards because that parameter is exposed to the program. I don't have same capability with the program with Nvidia cards so can't comment directly.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

I'm running my 290X(s) as hard as I can without there being any APs available and VDDC current averages 83A but VDDC voltage is only 1.180V so VDDC power in is only about 114W. I don't necessarily trust those numbers; the Corsair software says I don't pull more than 659.7W from the wall and that's running three cards.

Probably wise to feel a new power supply out in the beginning. I think you should have no troubles running your 280X's flat out. That is a good quality power supply and should have no issues keeping up with the 12V amp demands. Could either yourself or Woohoo throw up a screen shot of the Sensors page of GPUZ showing the amp usage for your AMD cards. I'm curious what the interface looks like since I don't have that with my Nvidia cards. Thanks in advance.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

So the numbers we have here are a bit different than before as I somehow got an AP. I think gpu-z is good for what it does but I don't use it much. System Information Viewer shows all of my cards simultaneously on one screen along with my cpu that just idles.

Thanks Woohoo. I was just curious what the GPU-Z sensor pages looked like for AMD products. I guess it depends on just what a card manufacturer exposes of their hardware that GPU-Z can display. I only can guess what my Nvidia cards use amp -wise when they're running. I can only see what the whole system uses in the UPS display or what SIV64 shows in the UPS section. I too mainly use SIV for monitoring what the system, CPU and GPU's are doing all the time, just keep it front and center all the time the systems are on.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

Probably wise to feel a new power supply out in the beginning. I think you should have no troubles running your 280X's flat out. That is a good quality power supply and should have no issues keeping up with the 12V amp demands. Could either yourself or Woohoo throw up a screen shot of the Sensors page of GPUZ showing the amp usage for your AMD cards. I'm curious what the interface looks like since I don't have that with my Nvidia cards. Thanks in advance.

GPU-Z and Openhardwaremonitor, side by side.

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Can someone check in on the thread; Running 2 or more WU at a time on a R9 390X? I gave him my advice, he made need more details though.

Peace and happy crunching!

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Running flat out with good temps and no errors...

Peace and Happy crunching peeps!

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Gpu load is only 55%

Gpu load is only 55%

Yep, it bounces around depending on WU completion and pickup of the next WU. Generally runs around 98-99% when fully loaded.

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Oh, I don't normally equate 55% gpu load with running flat out

Oh, I don't normally equate 55% gpu load with running flat out

Everything is set to 100% usage. Any suggestions are welcome. It does fluctuate depending on the WUs also, I'm sure.

AMD FX-8350 at 4100mhz
16gigs of G-Skill Ripjaws RAM at 1600mhz
2-Powercolor R9 280Xs 1030/1500mhz
Gigabyte GA970-UD3 MOBO
Samsung EVO 850 SSD
EVGA Supernova P2 1200W PSU

Peace and Happy Crunching!

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Oh, I don't normally equate 55% gpu load with running flat out

You have some very nice kit woohoo. I hope you can help me if you see something amiss...

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Oh, I don't normally equate 55% gpu load with running flat out

You have some very nice kit woohoo. I hope you can help me if you see something amiss...

He has Intel CPU`s you a AMD one.

You just need to free more cores as i mentioned a few times.

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With each crime and every kindness we birth our future.

AMD graphics cards have always been power hungry.

Unless you're referring to GCN-based GPUs vs recent generations of NV GPUs, then I wouldn't say 'always' is an accurate statement. ;)

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Soli Deo Gloria

...

You just need to free more cores ...

Also set to run multiple GPU tasks...?


This could be a good experiment to see what GPU utilisation can be gained for what number of tasks run simultaneously on the GPU and for how many CPU cores need to be reserved.


As for the 'Intel vs AMD', I'm sure all should realise the main difference is that Intel use "hyper threading" to divide one physical real world CPU core into two 'virtual cores' that each run at half speed, whereas AMD have biased their design more towards the server market providing full speed real physical cores to execute instructions always at full speed and it is their FPUs that are shared between two cores. Hence for the AMD FPUs for number crunching, best performance may be to run only as many tasks as physical FPUs...


There is excellent scope for test and comparison there!

(For myself for my usage, I still find the best price performance to be from using an AMD system running a GPU or two.)


Happy fast crunchin,
Martin

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