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    • N
      Nutnut Regular Member last edited by

      [quote name=“Bushstar” post=“9069” timestamp=“1370273334”]
      Let me know what you use from B&Q. I can trek over there to get some parts.
      [/quote]

      Aluminium Tubing (cut in half for the card mounting rails)
      http://www.diy.com/nav/fix/hardware/ironmongery/tubing___metal_rods/-specificproducttype-square_tube/FFA-Concept-Raw-Aluminium-Square-Tube-L-1000mm-x-W-16mm-x-T-1-5mm-9284089?skuId=9293789

      MDF 12mm (Cut into 3 - makes 3 rigs)
      http://www.diy.com/nav/build/timber/sheet-materials/mdf/length_1220mm/MDF-Board-L-1220-x-W-607-x-T-12mm-9276419?skuId=9286119

      Timber Upstands (cut into 2x 200mm and 2x 110mm)
      http://www.diy.com/nav/build/timber/sawn-timber/Sawn-Kiln-Dried-Timber-L-2400-x-W-38-x-T-19mm-9275841

      Screws (video card to tubing)
      http://www.diy.com/nav/fix/hardware/screws/self_tapping_screws/-specificproducttype-crosshead_drive_recess/Self-Tapping-Screw-AVF-860119-Pack-Of-25-W-3-5mm-x-L-12mm-9708735?skuId=10079472

      Screws (Mobo to MDF) Check these as I’m not sure if they are the right ones. Basically they need go through the mobo holes, through the standoff and into the mdf.
      http://www.diy.com/nav/fix/hardware/screws/interior_wood_screws/-specificproducttype-slotted_drive_recess/Woodscrew-AVF-861512-Pack-Of-25-W-5mm-x-L-25mm-9708875?skuId=10079612

      Screws (upstands to MDF and rails to upstands)
      http://www.diy.com/nav/fix/hardware/screws/interior_wood_screws/-specificproducttype-pozidriv_drive_recess/-lengthmm>50/Multi-Purpose-Single-Thread-Screw-AVF-854880-Pack-Of-25-W-4mm-x-L-50mm-9708302

      Raid Argos for a couple of pens (or any biro really) and cut them in to 10mm lengths and they make your mobo stand offs.

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      • N
        Nutnut Regular Member last edited by

        Here’s a closer image of how to assemble that lot. A bit “Mad Max” i know but it’s cheap and quick.

        [URL=http://imageshack.us/photo/my-images/7/p1000305fv.jpg/][IMG]http://img7.imageshack.us/img7/4227/p1000305fv.jpg[/img][/URL]

        [URL=http://imageshack.us/photo/my-images/515/p1000307s.jpg/][IMG]http://img515.imageshack.us/img515/6209/p1000307s.jpg[/img][/URL]

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        • S
          sheepson Regular Member last edited by

          That’s a nice setup you have there! ;D

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          • J
            J4c0b5L4tt3r last edited by

            Yep, that’s quite a setup indeed…

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            • T
              ThirtyNiner last edited by

              [quote name=“Nutnut” post=“9096” timestamp=“1370279414”]
              Here’s a closer image of how to assemble that lot. A bit “Mad Max” i know but it’s cheap and quick.

              [/quote]

              Hi NutNut, I notice from these pics that you do not appear to be running powered risers… I read in another thread here on the forum (sorry I don’t recall which) that despite the fact that the cards are all powered by the 6-pin PCIE cables from the power supply, they still draw a significant amount of power from the motherboard through the slots. In the post I am referring to, the OP warned against running (3 or more?) cards without powered risers as it risked drawing too much power through the motherboards main power cable - he posted a pic showing a blown pin - and ruining you mainboard. Have you ever encountered any problems?

              I have a bunch of new equipment on the way, including powered risers, but I am nevertheless curious if they are required.

              TN

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              • Z
                zythen Regular Member last edited by

                Good question. I added powered risers to err on the side of caution.

                Also what power supplies are you running nutnut? I have a 1250w and added a sync’d 800watt b/c my four Gigabyte 7950s were pulling more than 1250 watts. :P

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                • N
                  Nutnut Regular Member last edited by

                  Ahhh yes, the myth that is powered risers… All i can say is that i have 20* 7970s (5 rigs, 4 boards each) and NEVER had an issue. My risers never caught on fire, I’ve never burnt a pin out of the 24pin connector and I’ve never blown the tracks on my motherboards.

                  [quote name=“zythen” post=“9115” timestamp=“1370287104”]
                  I have a 1250w and added a sync’d 800watt b/c my four Gigabyte 7950s were pulling more than 1250 watts. :P
                  [/quote]

                  i use either Seasonic x1250 or, against better judgement, the Corsair AX1200. If you measured you power at the wall then that explains it. A [b][i]good[/i][/b] power supply will deliver it’s stated power to the components. The issue is that power supplies are NOT 100% efficient therefor a 1200w supply may pull 1320+ watts from the wall (based on ~90% efficency). In short, if your supply doesn’t trip and your rig seems stable, don’t worry too much about it. I have 1000s of hours on my psus and all is well so far. Good PSUs have a fair amount of headroom built in - just keep 'em cool and they’ll be fine.

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                  • S
                    svennand Regular Member last edited by

                    [quote name=“Nutnut” post=“9145” timestamp=“1370295092”]
                    Ahhh yes, the myth that is powered risers… All i can say is that i have 20* 7970s (5 rigs, 4 boards each) and NEVER had an issue. My risers never caught on fire, I’ve never burnt a pin out of the 24pin connector and I’ve never blown the tracks on my motherboards.

                    [quote author=zythen link=topic=264.msg9115#msg9115 date=1370287104]
                    I have a 1250w and added a sync’d 800watt b/c my four Gigabyte 7950s were pulling more than 1250 watts. :P
                    [/quote]

                    i use either Seasonic x1250 or, against better judgement, the Corsair AX1200. If you measured you power at the wall then that explains it. A [b][i]good[/i][/b] power supply will deliver it’s stated power to the components. The issue is that power supplies are NOT 100% efficient therefor a 1200w supply may pull 1320+ watts from the wall (based on ~90% efficency). In short, if your supply doesn’t trip and your rig seems stable, don’t worry too much about it. I have 1000s of hours on my psus and all is well so far. Good PSUs have a fair amount of headroom built in - just keep 'em cool and they’ll be fine.
                    [/quote]

                    Very satisfied with my seasonic 1250’s, but if you want 5-6 card in one rig im really loving the enermax revo 1500w, driven 3x7970 1x6970 2x7850 on a eig no problem. Doesnt even get remotely hot

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                    • Z
                      zythen Regular Member last edited by

                      Thanks Nutnut. That’s good information to know. I guess I’ll stop wasting money on the powered risers.

                      I’m running 4 7950s w/ a Seasonic 1250w and a Corsair 800w at the moment and I think w/ my MB I can run a 5th.

                      Before I really go much larger scale I need to work on a) additional cooling in the room b) power (I guess I’ll run a couple 20amp circuits).

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                      • N
                        Nutnut Regular Member last edited by

                        [quote name=“zythen” post=“9153” timestamp=“1370296626”]
                        Thanks Nutnut. That’s good information to know. I guess I’ll stop wasting money on the powered risers.

                        I’m running 4 7950s w/ a Seasonic 1250w and a Corsair 800w at the moment and I think w/ my MB I can run a 5th.

                        Before I really go much larger scale I need to work on a) additional cooling in the room b) power (I guess I’ll run a couple 20amp circuits).
                        [/quote]
                        If your running windoze you may struggle. I’ve heard many people have issues. Much simpler to have multiple 4x rigs running IMHO.

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                        • Z
                          zythen Regular Member last edited by

                          I’m currently running Xubuntu headless :)

                          I tried w/ a USB stick first but it was just way to slow so I dropped in a solidstate 32Gb drive I had laying around.

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                          • T
                            ThirtyNiner last edited by

                            [quote name=“Nutnut” post=“9145” timestamp=“1370295092”]
                            Ahhh yes, the myth that is powered risers… All i can say is that i have 20* 7970s (5 rigs, 4 boards each) and NEVER had an issue. My risers never caught on fire, I’ve never burnt a pin out of the 24pin connector and I’ve never blown the tracks on my motherboards.
                            [/quote]

                            Thanks, appreciate the response. I wonder too if if could have something to do with the quality of the motherboard and psu. I’ve burnt a PCIE to Molex pigtail adapter once - when I looked at it afterward I discovered it used 18 gauge wire while the others had 16 gauge.

                            TN

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                            • Z
                              zythen Regular Member last edited by

                              [quote name=“ThirtyNiner” post=“9166” timestamp=“1370297738”]
                              …when I looked at it afterward I discovered it used 18 gauge wire while the others had 16 gauge.

                              [/quote]

                              Haha that’ll do it! :)

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                              • N
                                Nutnut Regular Member last edited by

                                [quote name=“ThirtyNiner” post=“9166” timestamp=“1370297738”]
                                [quote author=Nutnut link=topic=264.msg9145#msg9145 date=1370295092]
                                Ahhh yes, the myth that is powered risers… All i can say is that i have 20* 7970s (5 rigs, 4 boards each) and NEVER had an issue. My risers never caught on fire, I’ve never burnt a pin out of the 24pin connector and I’ve never blown the tracks on my motherboards.
                                [/quote]

                                Thanks, appreciate the response. I wonder too if if could have something to do with the quality of the motherboard and psu. I’ve burnt a PCIE to Molex pigtail adapter once - when I looked at it afterward I discovered it used 18 gauge wire while the others had 16 gauge.

                                TN
                                [/quote]

                                Almost without a doubt! I use double copper motherboards and reputable psu’s. if you try to get away with buying cheap stuff you’ll get burned (pun intended). Buy cheap, buy twice.

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                                • J
                                  justabitoftime last edited by

                                  [quote name=“Nutnut” post=“9168” timestamp=“1370297993”]
                                  [quote author=ThirtyNiner link=topic=264.msg9166#msg9166 date=1370297738]
                                  [quote author=Nutnut link=topic=264.msg9145#msg9145 date=1370295092]
                                  Ahhh yes, the myth that is powered risers… All i can say is that i have 20* 7970s (5 rigs, 4 boards each) and NEVER had an issue. My risers never caught on fire, I’ve never burnt a pin out of the 24pin connector and I’ve never blown the tracks on my motherboards.
                                  [/quote]

                                  Thanks, appreciate the response. I wonder too if if could have something to do with the quality of the motherboard and psu. I’ve burnt a PCIE to Molex pigtail adapter once - when I looked at it afterward I discovered it used 18 gauge wire while the others had 16 gauge.

                                  TN
                                  [/quote]

                                  Almost without a doubt! I use double copper motherboards and reputable psu’s. if you try to get away with buying cheap stuff you’ll get burned (pun intended). Buy cheap, buy twice.
                                  [/quote]

                                  For one of my rigs, I plan on hooking up 4 of my 7950s.

                                  1. Seasonic SS-1250XM X-Series ATX PC Power Supply looks like it’ll be enough from what a read?

                                  2. You mentioned double copper motherboards… do you have a few recommendations? I was looking at this board:
                                  http://www.amazon.com/dp/B0058HUQJ0/ref=as_li_ss_til?tag=onsimobicomps-20&camp=0&creative=0&linkCode=as4&creativeASIN=B0058HUQJ0&adid=10D3PH9KV2KBDFN5N9N5

                                  As always, I appreciate the advice here.

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                                  • N
                                    Nutnut Regular Member last edited by

                                    PSU is practically a legend IMHO. I use 3 of them (would be 5 but stock at the time prevented it) and they run 4* 7970’s overclocked (happily pulls 1350w from the wall when hot) so they’ll be fine with 7950s.

                                    As for the Mobo i really cant comment except to say i use these, bit more expensive but i know they work so i’ll stick with them… http://www.amazon.com/GIGABYTE-GA-990FXA-UD3-990FX-SATA-Motherboard/dp/B0055QYKQO/ref=sr_1_1?s=electronics&ie=UTF8&qid=1370421880&sr=1-1&keywords=990fxa-ud3

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                                    • J
                                      justabitoftime last edited by

                                      [quote name=“Nutnut” post=“9561” timestamp=“1370422189”]
                                      PSU is practically a legend IMHO. I use 3 of them (would be 5 but stock at the time prevented it) and they run 4* 7970’s overclocked (happily pulls 1350w from the wall when hot) so they’ll be fine with 7950s.

                                      As for the Mobo i really cant comment except to say i use these, bit more expensive but i know they work so i’ll stick with them… http://www.amazon.com/GIGABYTE-GA-990FXA-UD3-990FX-SATA-Motherboard/dp/B0055QYKQO/ref=sr_1_1?s=electronics&ie=UTF8&qid=1370421880&sr=1-1&keywords=990fxa-ud3
                                      [/quote]

                                      Agreed (so much research on these)

                                      As for the processor, I’m thinking:

                                      http://www.amazon.com/AMD-Sempron-145-Processor-SDX145HBGMBOX/dp/B0040BPHJO/ref=sr_1_1?s=electronics&ie=UTF8&qid=1370425403&sr=1-1&keywords=Sempron+145+processor

                                      RAM, I’m thinking:

                                      http://www.amazon.com/Corsair-Vengeance-240-Pin-Platforms-CMZ8GX3M2A1600C9/dp/B004CRSM4I/ref=pd_cp_e_2

                                      HD, I’m thinking:

                                      http://www.amazon.com/Western-Digital-Caviar-Cache-Desktop/dp/B00461G3MS/ref=sr_1_4?s=electronics&ie=UTF8&qid=1370425684&sr=1-4&keywords=hard+drive

                                      (or if I can find some old ones from spare parts)

                                      If anyone sees something wrong with this, please let me know. I’m sure once I get past my first rig, life will be easier. ;)

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                                      • N
                                        Nutnut Regular Member last edited by

                                        That should all be fine.

                                        Personally however i’d drop the RAM to 4GB and not bother with high-end sticks. Cheap and cheerful is the way to go if you want bang for buck!

                                        HDD - (Contradicting the above) I would go for an SSD such as http://www.amazon.com/Intel-Solid-State-Drive-SATA-2-5-Inch/dp/B007P71IM0/ref=sr_1_1?s=electronics&ie=UTF8&qid=1370426105&sr=1-1&keywords=intel+ssd+330 Totally not necessary but they run cold, use next to no power and are fast as… When your rebooting the rigs and installing software etc it’s sooooo much nicer than waiting for your spinners! Oh, and they’re not that much dearer.

                                        CPU - i went for the FX4100 mainly for resale value and the fact that my rigs will likely get repurposed at some stage and the semprons aren’t great IMHO. Fine for mining though.

                                        All exciting stuff!!

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                                        • J
                                          justabitoftime last edited by

                                          [quote name=“Nutnut” post=“9586” timestamp=“1370426722”]
                                          That should all be fine.

                                          Personally however i’d drop the RAM to 4GB and not bother with high-end sticks. Cheap and cheerful is the way to go if you want bang for buck!

                                          HDD - (Contradicting the above) I would go for an SSD such as http://www.amazon.com/Intel-Solid-State-Drive-SATA-2-5-Inch/dp/B007P71IM0/ref=sr_1_1?s=electronics&ie=UTF8&qid=1370426105&sr=1-1&keywords=intel+ssd+330 Totally not necessary but they run cold, use next to no power and are fast as… When your rebooting the rigs and installing software etc it’s sooooo much nicer than waiting for your spinners! Oh, and they’re not that much dearer.

                                          CPU - i went for the FX4100 mainly for resale value and the fact that my rigs will likely get repurposed at some stage and the semprons aren’t great IMHO. Fine for mining though.

                                          All exciting stuff!!
                                          [/quote]

                                          Again, thanks for your help! I think the one piece I’m now missing are extenders. I saw this in my 4k rig post

                                          “1x risers (i get mine from bitmit with btc) $3 - $27”

                                          With that motherboard and 4 cards per board… does that mean I need to order 4 risers per board? I’ll be honest, I’ve never used these before.

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                                          • N
                                            Nutnut Regular Member last edited by

                                            I’d go for 4* 1x-16x extenders. If you go for 1x to 1x extenders you have to cut a notch out of the back end of the slot so the 16x connector of the card can fit. Electrically they are the same but physically the 1x-16x are easier. I managed to break 2 of the 1x risers whilst “notching” them.

                                            If you were UK based i have a few spare but you are US based are you not?

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