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Number crunching :
my upgrade
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Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13886 Credit: 208,696,464 RAC: 304 ![]() ![]() |
I was going to post new pictures today but there has been a problem. Motherboard failure! New board tomorrow. New thread tomorrow. No need for a new thread, just keep it in this one. Grant Darwin NT |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
The mb was only 2 weeks old. Had problems from the start. I ordered a new mb last week cause i really, really hated this one! There was no OC on the mb or the 480 cards. Jon |
![]() ![]() Send message Joined: 22 Nov 01 Posts: 1904 Credit: 2,646,654 RAC: 0 ![]() |
Oh my giddie aunt! Here's a replacement mobo for you. |
![]() ![]() Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 ![]() ![]() |
only $915!!! that makes the GPU's seem cheap by comparison. /me rolls eyes, faints ![]() In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
Oh my giddie aunt! Here's a replacement mobo for you. It is a nice one but I got this one... http://www.newegg.com/Product/Product.aspx?Item=N82E16813128446 Jon |
![]() Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 ![]() |
What you want to do? :-) 7x GTX480 on one mobo? What a monster machine this will be! If 2+ WUs/GPU, then maybe a 2x CPU (8 (or 12) threads each) mobo or a 12 threads CPU for single socket mobo would be well for well performance/support? You have maybe infos about the PCIe cable connectors/connection? To now I didn't found infos about. All 16 lanes of a PCIe x16 slot are connected and will be transferred? They have a speed limit? PCIe 2.0 is possible? ![]() |
![]() ![]() Send message Joined: 22 Nov 01 Posts: 1904 Credit: 2,646,654 RAC: 0 ![]() |
What you want to do? :-) Slots: Seven PCI Express 2.0 x16 slots (first, third, fifth and seventh slots working at x16 when up to four video cards are installed, and speed reduced to x8 when five or more video cards are installed) That price in my link is Australian $. Average price in the US*: USD 595.00 Here is a link to more information about the board. |
![]() Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 ![]() |
AFAIK, at least PCIe 2.0 x8 (or PCIe 1.0 x16) speed is needed for well CUDA crunching. So if Jon's GIGABYTE mobo support this also he could let run 7 GTX480. WOW! EDIT: But maybe faster PCIe speed is needed if 2+ WUs/GPU? ![]() |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
Good news and bad news. Th new mb came in installed. Everything was good until the fire. Not really a fire but smoke coming from the wires. The wires are from the Dual Power Supply Adapter Cable http://www.frozencpu.com/products/5637/cpa-167/Lian_Li_Dual_Power_Supply_Adapter_Cable.html. Small part of the Adapter and the 24pin plug melted. Pulled apart when it cooled but not sure if i want to use that psu. have a 1000W psu i can use in place of it. |
![]() ![]() Send message Joined: 20 Aug 02 Posts: 3377 Credit: 20,676,751 RAC: 0 ![]() |
Here's hoping it's the PSU and not something to do with the new MB. ![]() PROUD MEMBER OF Team Starfire World BOINC |
![]() Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 ![]() |
Maybe too much wattage for the adapter? Some infos in the specs? ![]() |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
I think it was the adapter. More damage to it that the 24pin plug. At the time there was the i7-980 and 3 cards. BTW i changed to i7-920 to a i7-980 from another computer. |
![]() Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 ![]() |
A 12 thread-CPU is a very nice thing.. :-) ![]() |
![]() ![]() Send message Joined: 23 May 99 Posts: 4292 Credit: 72,971,319 RAC: 0 ![]() |
I think it was the adapter. More damage to it that the 24pin plug. At the time there was the i7-980 and 3 cards. BTW i changed to i7-920 to a i7-980 from another computer. When I tried 2 power supplies I stripped a bit of the green and black wires going to the MB and ran a wire from green to green and black to black and they both started at the same time and ran fine...Had to use a second PS until my 1250 watt arrived. Official Abuser of Boinc Buttons... And no good credit hound! ![]() |
![]() ![]() Send message Joined: 15 Mar 01 Posts: 1011 Credit: 230,314,058 RAC: 0 ![]() |
Good news and bad news. Th new mb came in installed. Everything was good until the fire. Not really a fire but smoke coming from the wires. The wires are from the Dual Power Supply Adapter Cable http://www.frozencpu.com/products/5637/cpa-167/Lian_Li_Dual_Power_Supply_Adapter_Cable.html. Small part of the Adapter and the 24pin plug melted. Pulled apart when it cooled but not sure if i want to use that psu. have a 1000W psu i can use in place of it. i would think your power supplies are fine. problem is there are to few ground wire in that adapter connecting the ground plane togather. you have know way of knowing how much power that could be flowing thru it. ![]() ![]() |
![]() ![]() Send message Joined: 15 Mar 01 Posts: 1011 Credit: 230,314,058 RAC: 0 ![]() |
"only suppose to" is the key, kind of like painting on load direction arrows on aircraft structure so the load knows where to go, lol. so please explain why that was the wire that melted? ![]() ![]() |
Bearcat Send message Joined: 10 Sep 99 Posts: 106 Credit: 10,778,506 RAC: 0 ![]() |
What if you would just turn the psu into always on ? I remember reading about that when I planned to turn one of my old power supplies into a poor mans lab psu. It only takes a power resistor. Here is the link to the page. You might have to dig a little. http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
Here is it. Looks like pin #3 was the problem. ![]() Jon |
![]() Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 ![]() |
AFAIK, at least PCIe 2.0 x8 (or PCIe 1.0 x16) speed is needed for well CUDA crunching. I didn't said it wouldn't work with less speed. As I build my GPU machine (for ~ 1 1/2 years) I looked around in differenct forum and I saw, that you have best/max CUDA performance if you have at least PCIe 2.0 x8 or PCIe 1.0 x16 slot for each GPU. Also a member made a test here in the forum. Because of the max limit of one year in the forum search, I can't find it. He tested his GPU in all slot speeds and saw that the GPU performance went down on slower slots. IIRC, PCIe 1.0 x4 had ~ 10 % less, and PCIe 1.0 x8 ~ 3 % less performance. (But this values could be wrong, as I'm an old man ;-) But for sure I remember, at least PCIe 1.0 x16 or PCIe 2.0 x8 needed for max/best CUDA performance. If I look in TaskManager if my system crunch CUDA, I see that the GPU get support from the CPU. Also faster system RAM decrease the CUDA calculation time. So the CPU and system RAM is important for CUDA. So also the PCIe slot. Here at SETI@home my GPU get ~ 45 secs. support/~ 10 mins. WU. If I compare with MilkyWay@home, my GPU make all WUs in ~ 10 mins. there, the WU get ~ 8 secs. support from the CPU. So there are projects which benefit more or less from faster PCIe speed. ![]() |
Jon Send message Joined: 12 Aug 09 Posts: 157 Credit: 139,063,241 RAC: 0 ![]() |
Those flexible adapters are not really working at the moment. Put 4 cards right on the mb and it works. It's drawing ~1050w doing 4 cards at 2wu's/gpu only. gpu usage is 90%. Jon |
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