TrekCZ
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Tomchekk
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Re:Titan PCI-E benchmark
2013/07/07 09:10:50
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shogon
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Re:Titan PCI-E benchmark
2013/07/07 10:16:16
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I must be doing something wrong, or something is just off haha
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I will either find a way, or make one. ٩(๏̯͡๏)۶
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TrekCZ
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Re:Titan PCI-E benchmark
2013/07/07 10:44:36
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shogon I must be doing something wrong, or something is just off haha No, it is ok, you can run concBandwidthTest.exe 0 1 to see how PCI-E is saturated, it should show over 20000MB/s if you have good motherboard and cpu, which can use both card simultaneously with full speed PCI-E throughput. Only let down is that Titan does not support concurrent bidirectional transfer, but anyway I suppose no application supports it and it would be difficult to optimize algorithms to fully exploit this feature.
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Tomchekk
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Re:Titan PCI-E benchmark
2013/07/07 10:52:24
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On X79 you have to enable ("hack") PCI-E 3.0 in your registry. It looks as though perhaps you have not done this. here is a link with instuctions, if you have not and are interested www dot evga dot com/forums/tm.aspx?&m=1607292&mpage=1 I don'y have enough posts yet to link direct, so...
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shogon
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Re:Titan PCI-E benchmark
2013/07/07 13:22:35
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I have had the 3.0 hack enabled, thing is I didn't do 0 1, I just did each card individually (I think). Here we are,
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TrekCZ
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Re:Titan PCI-E benchmark
2013/07/07 13:45:54
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Which is pretty damn fast, in the original thread there is e.g. x58 result which has total pcie bandwidth with 2 or 3 gpus similar as with one gpu (so x58 was "faked"). Now with x79 and appropriate cpu one card reaches 11000MB/s (which is slower than x87 where I have 12000MB/s, but it is not big difference) and two cards 22000MB/s which is impressive number and not faked chipset or cpu.
post edited by TrekCZ - 2013/07/07 13:49:11
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zeroskillz
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Re:Titan PCI-E benchmark
2013/07/07 14:48:16
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Mine is about 1/4 of what you guys are getting, but I am on PCI-E 2.0, I assume that's why.
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HeavyHemi
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Re:Titan PCI-E benchmark
2013/07/07 16:49:27
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TrekCZ shogon I must be doing something wrong, or something is just off haha No, it is ok, you can run concBandwidthTest.exe 0 1 to see how PCI-E is saturated, it should show over 20000MB/s if you have good motherboard and cpu, which can use both card simultaneously with full speed PCI-E throughput. Only let down is that Titan does not support concurrent bidirectional transfer, but anyway I suppose no application supports it and it would be difficult to optimize algorithms to fully exploit this feature. This will probably answer your question directly... Tesla Faster PCIe communication The only NVIDIA product with two DMA engines for bi-directional PCIe communication http://www.nvidia.com/object/why-choose-tesla.html
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TrekCZ
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Re:Titan PCI-E benchmark
2013/07/08 05:03:31
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zeroskillz Mine is about 1/4 of what you guys are getting, but I am on PCI-E 2.0, I assume that's why. If you tested bandwidth with one card then the reason is PCI-E 2.0 and fact that you tested with one card.
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