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<p>Well, I don't have one like this. What I have instead is this:</p>
<p><br></p>
<p>1. A single 6-pin directly from the PSU.</p>
<p>2. A single molex to 6-pin (my PSU does provide one molex).</p>
<p>3. Two 6-pins to a single 8-pin converter going to the card.</p>
<p><br></p>
<p>In other words, I can populate both 6-pins on the 6-8 converter, just not sure about the pinouts in this case.</p>
<p><br></p>
<p>Not good?</p>
<p><br></p>
<p>Alex</p>
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<p><span class=rvts7>What I meant is this: </span><a class=rvts8 href="http://goo.gl/8o1B5P">http://goo.gl/8o1B5P</a></p>
<p><br></p>
<p><span class=rvts7>That is 2x molex -> 8pin PCI-E. A single molex may not be enouhg.</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts7>--</span></p>
<p><span class=rvts7>Szilárd</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts7>On Tue, Jun 30, 2015 at 7:10 PM, Alex <</span><a class=rvts8 href="mailto:nedomacho@gmail.com">nedomacho@gmail.com</a><span class=rvts7>> wrote:</span></p>
<p><br></p>
<p><span class=rvts7>It is a 4-core CPU, single GPU box, so I doubt I will be running more</span></p>
<p><span class=rvts7>than one at a time. We will very likely get a different PSU, unless...</span></p>
<p><span class=rvts7>I do have a molex to 6 pin concerter sitting on this very desk. Do you</span></p>
<p><span class=rvts7>think it will satisfy the card? I just don't know how much a single</span></p>
<p><span class=rvts7>molex line delivers. If you feel this should work, off to installing</span></p>
<p><span class=rvts7>everything I go.</span></p>
<p><br></p>
<p><span class=rvts7>Thanks a bunch,</span></p>
<p><span class=rvts7>Alex</span></p>
<p><br></p>
<p><span class=rvts7>SP> First of all, unless you run multiple independent simulations on the same</span></p>
<p><span class=rvts7>SP> GPU, GROMACS runs alone will never get anywhere near the peak power</span></p>
<p><span class=rvts7>SP> consumption of the GPU.</span></p>
<p><br></p>
<p><span class=rvts7>SP> The good news is that NVIDIA has gained some sanity and stopped blocking</span></p>
<p><span class=rvts7>SP> GeForce GPU info in nvidia-smi - although only for newer cars, but it does</span></p>
<p><span class=rvts7>SP> work with the 960 if you use a 352.xx driver:</span></p>
<p><span class=rvts7>SP> +------------------------------------------------------+</span></p>
<p><br></p>
<p><span class=rvts7>SP> | NVIDIA-SMI 352.21 Driver Version: 352.21 |</span></p>
<p><br></p>
<p><span class=rvts7>SP> |-------------------------------+----------------------+----------------------+</span></p>
<p><span class=rvts7>SP> | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr.</span></p>
<p><span class=rvts7>SP> ECC |</span></p>
<p><span class=rvts7>SP> | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute</span></p>
<p><span class=rvts7>SP> M. |</span></p>
<p><span class=rvts7>SP> |===============================+======================+======================|</span></p>
<p><span class=rvts7>SP> | 0 GeForce GTX 960 Off | 0000:01:00.0 On |</span></p>
<p><span class=rvts7>SP> N/A |</span></p>
<p><span class=rvts7>SP> | 8% 45C P5 15W / 130W | 1168MiB / 2044MiB | 31%</span></p>
<p><span class=rvts7>SP> Default |</span></p>
<p><span class=rvts7>SP> +-------------------------------+----------------------+----------------------+</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts7>SP> A single 6-pin can deliver 75W, an 8-pin 150W, so in your case, the hard</span></p>
<p><span class=rvts7>SP> limits of what your card can pull is 75W from the PCI-E slow + 150W from</span></p>
<p><span class=rvts7>SP> the cable = 225 W. With a single 6-pin cable you'll only get ~150W max.</span></p>
<p><span class=rvts7>SP> That can be OK if your card does not pull more power (e.g. the above</span></p>
<p><span class=rvts7>SP> non-overclocked card would be just fine), but as your card is overclocked,</span></p>
<p><span class=rvts7>SP> I'm not sure it won't peak above 150W.</span></p>
<p><br></p>
<p><span class=rvts7>SP> You can try to get a molex -> PCI-E power cable converter.</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts7>SP> --</span></p>
<p><span class=rvts7>SP> Szilárd</span></p>
<p><br></p>
<p><br></p>
<p><span class=rvts7>SP> On Mon, Jun 29, 2015 at 9:56 PM, Alex <</span><a class=rvts8 href="mailto:nedomacho@gmail.com">nedomacho@gmail.com</a><span class=rvts7>> wrote:</span></p>
<p><br></p>
<p><span class=rvts7>>> Hi all,</span></p>
<p><span class=rvts7>>></span></p>
<p><span class=rvts7>>> I have a bit of a gromacs-unrelated question here, but I think this is a</span></p>
<p><span class=rvts7>>> better place to ask it than, say, a gaming forum. The Nvidia GTX 960 card</span></p>
<p><span class=rvts7>>> we got here came with an 8-pin AUX connector on the card side, which</span></p>
<p><span class=rvts7>>> interfaces _two_ 6-pin connectors to the PSU. It is a factory superclocked</span></p>
<p><span class=rvts7>>> card. My 525W PSU can only populate _one_ of those 6-pin connectors. The</span></p>
<p><span class=rvts7>>> EVGA website states that I need at least 400W PSU, while I have 525.</span></p>
<p><span class=rvts7>>></span></p>
<p><span class=rvts7>>> At the same time, I have a dedicated high-power PCI-e slot, which on the</span></p>
<p><span class=rvts7>>> motherboard says "75W PCI-e". Do I need a different PSU to populate the AUX</span></p>
<p><span class=rvts7>>> power connector completely? Are these runs equivalent to drawing max power</span></p>
<p><span class=rvts7>>> during gaming?</span></p>
<p><span class=rvts7>>></span></p>
<p><span class=rvts7>>> Thanks!</span></p>
<p><span class=rvts7>>></span></p>
<p><span class=rvts7>>> Alex</span></p>
<p><span class=rvts7>>> --</span></p>
<p><span class=rvts7>>> Gromacs Users mailing list</span></p>
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<p><span class=rvts7>>> * Please search the archive at</span></p>
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<p><span class=rvts7>>> posting!</span></p>
<p><span class=rvts7>>></span></p>
<p><span class=rvts7>>> * Can't post? Read </span><a class=rvts8 href="http://www.gromacs.org/Support/Mailing_Lists">http://www.gromacs.org/Support/Mailing_Lists</a></p>
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<p><br></p>
<p><span class=rvts7>--</span></p>
<p><span class=rvts7>Gromacs Users mailing list</span></p>
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<p><span class=rvts9>-- </span></p>
<p><span class=rvts9>Best regards,</span></p>
<p><span class=rvts9> Alex </span><a class=rvts10 href="mailto:nedomacho@gmail.com">mailto:nedomacho@gmail.com</a></p>
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