Nenon Posted August 9, 2019 Share Posted August 9, 2019 Look at Sean Jacobs too - he can make you a custom LPS, and they are really good, but expensive - http://www.custom-hifi-cables.co.uk/home/power-supplies/dc3-power-supply Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
Nenon Posted August 15, 2019 Share Posted August 15, 2019 1 hour ago, Niko said: Do you know weather Sean Jacobs can build atx LPSU as well ? I didn't find the answer on his webpage. Sure, he can. Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
Nenon Posted September 9, 2020 Share Posted September 9, 2020 You can get one of these DC to DC ATX converters - https://hdplex.com/hdplex-800w-dc-atx-with-16v-63vdc-input.html (or their 400W version) - and get a 19V SR7 to power it. Additionally, you can get a 12V SR7 to power the CPU (EPS connector on your motherboard) separately. That would be another improvement and you can do it in the future rather than all in one step. The 800W DC to DC ATX is pretty good, and especially if you have a dedicated rail for the EPS, the end result is pretty good. That would be my recommendation. Alternatively, you can get a 4 rail linear power supply and eliminate the HDPlex DC to DC ATX, but that's a bigger hassle, because the linear power supply would not follow the ATX standard and you have to do some hacks. Aberrant-Decoder 1 Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
Popular Post Nenon Posted September 10, 2020 Popular Post Share Posted September 10, 2020 3 hours ago, Niko said: Thanks for your suggestion, Nenon. I'm just wondering whether adding a DC to ATX converter to the SR7 wouldn't cancel the benefits of such a premium PSU, and that i'd be better off S.Q. wise with my initial choice, i.e. an HDD Plex 500W (to come) full linear atx PSU ? From my experience two rails of top LPS (i.e. Paul Hynes or Sean Jacobs), one to feed the CPU and one to feed the HdPlex DC to DC ATX converter yields better results than any of the Hdplex ATX LPS. YMMV. genvirt, motberg and Exocer 3 Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
Nenon Posted October 1, 2020 Share Posted October 1, 2020 On 9/29/2020 at 2:13 PM, ingemar said: What kind of amperege do i need to get a Xeon E3-1245 v3 going?I'm curios to try a separete psu for the cpu. Typically, something like 12V - 10A would power 95W TDP CPUs okay. 3 hours ago, Niko said: This let me wonder how do you guys with top systems power them up. Isn't using ATX LPSU the best option ? So far it is, until someone comes up with new technology. A typical server with PCIe USB card and PCIe NIC card would need 6 rails: ATX - 3 rail EPS - 1 rail PCIe USB - 1 rail PCIe NIC - 1 rail I good compromise is to use separate rails for EPS, PCIe USB, and PCIe NIC and combine the 3 x ATX rails into a single rail that's further split by the HDPlex 800W DC to DC ATX. In that case you would need 4 rails: ATX - 1 rail --> HDPlex --> 3 x ATX rails EPS - 1 rail PCIe USB - 1 rail PCIe NIC - 1 rail Another reason why this is a good compromise is that you end up having an ATX controller to work with your motherboard. If you just use a Paul Hynes or Sean Jacobs LPS you don't get the ATX part. Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
Popular Post Nenon Posted October 1, 2020 Popular Post Share Posted October 1, 2020 43 minutes ago, Niko said: @Nenon, when you mention: What kind of hack do you mean ? Like using adaptors and jumpers, or more like opening the case and soldering ? ATX is a specification for the motherboard and the power supply to work together. You can read more here: https://en.wikipedia.org/wiki/ATX For example, pin #8 on the ATX connector is PWR_OK (Power good). The motherboard expects to see +5V DC on that pin to boot. There are little details like that that you have to be familiar with to make the motherboard and a LPS not following the ATX specs work together. And even if you are quite familiar with the ATX specs, I have seen some motherboard that don't play well with non-ATX power supply. For example, many motherboards by default are configured to reset the BIOS if they fail to boot multiple times in a row. I've seen a motherboard that would not post once it gets to that stage, until you connect a LPS. And I could not figure it out why for several days in a row. And there are many other issues you can run into. Or if you are lucky, you would not run into any issues at all. But my point was that using a HDplex 800W DC to DC ATX to handle the ATX connector is not a bad compromise when you use good quality power supplies. The most important power supply is the one feeding the EPS and the one feeding the USB card. Use the best you have there. 43 minutes ago, Niko said: i could i.e. use an SR7 multi rails for the 3 ATX rails plus an external or pcie device, and an SR4 for the CPU, right ? Why not the other way around? The CPU consumes most of the power, so use the more powerful and better SR7 there. LJONESATL and StreamFidelity 1 1 Industry disclosure: https://chicagohifi.com Dealer for: Taiko Audio, Conrad Johnson, Audio Mirror, and Sean Jacobs Link to comment
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