help with pci express

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anomi
Licensed Customer
Posts: 55
Joined: Sat Oct 23, 2010 3:54 pm

pls octane team i plan to buy a cubix xpander pro 2, i was hoping i could use it on both my laptop and desktop but soon found out that the express card 34 connection
speed is low(2.5gbps compared to 80gbps desktop version) i need help on deciding which pci e slot is best for octane render i know x16 is the fastest but i need to know its octane performance difference with a x8 and x1 or express card 34 slot, is the difference huge? so i can make a better decision. :? thanks in advance
gigabyte mobo, core2quad, 8gb ram, x2 pny gtx 580,
hp pavilion hdx series(desktop replacement) 4gb ram, gt 8800
win7 x64bit, octane 2.3 v5
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kubo
Posts: 1377
Joined: Wed Apr 21, 2010 4:11 am
Location: Madrizzzz

actually the speed of the pci-e only matter when loading the scene to the memory, once done, it doesn't affect rendering. So if you use a 1x it'll be slower than a 8x but you won't notice it. I've got my 470 in a 8x slot and my 260 in the 16x, the 470 is the one I use for rendering and I don't really apreciate the difference between them.
windows 7 x64 | 2xGTX570 (warming up the planet 1ºC at a time) | i7 920 | 12GB
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Jaberwocky
Licensed Customer
Posts: 976
Joined: Tue Sep 07, 2010 3:03 pm

You can use PCIE x4 - X16 slots for the graphics cards.PCIE V2.0 would be prefered for bandwidth.However the only impact on using a slower slot like a x4 would be the increased time it takes to load the scene into the graphics card.Once it is in the card the scene will render just as quickly.
CPU:-AMD 1055T 6 core, Motherboard:-Gigabyte 990FXA-UD3 AM3+, Gigabyte GTX 460-1GB, RAM:-8GB Kingston hyper X Genesis DDR3 1600Mhz D/Ch, Hard Disk:-500GB samsung F3 , OS:-Win7 64bit
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anomi
Licensed Customer
Posts: 55
Joined: Sat Oct 23, 2010 3:54 pm

thanks a bunch guyz u pretty much nailed it, is this same load process applicable to games too? crysis 2, and call of duty bo is just around the corner,
all work no play makes anomi a boring boy. :lol:
gigabyte mobo, core2quad, 8gb ram, x2 pny gtx 580,
hp pavilion hdx series(desktop replacement) 4gb ram, gt 8800
win7 x64bit, octane 2.3 v5
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Jaberwocky
Licensed Customer
Posts: 976
Joined: Tue Sep 07, 2010 3:03 pm

No.Careful.Games are a whole different issue.The Games run off the CPU and Ram.Results are then fed to the graphics card continously.That means bandwidth is an issue.A PCIE V2.0 x8 slot at least is needed to be effective.
CPU:-AMD 1055T 6 core, Motherboard:-Gigabyte 990FXA-UD3 AM3+, Gigabyte GTX 460-1GB, RAM:-8GB Kingston hyper X Genesis DDR3 1600Mhz D/Ch, Hard Disk:-500GB samsung F3 , OS:-Win7 64bit
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anomi
Licensed Customer
Posts: 55
Joined: Sat Oct 23, 2010 3:54 pm

thanks Jaberwocky that would do
gigabyte mobo, core2quad, 8gb ram, x2 pny gtx 580,
hp pavilion hdx series(desktop replacement) 4gb ram, gt 8800
win7 x64bit, octane 2.3 v5
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aiko73
Posts: 1
Joined: Tue Nov 09, 2010 5:34 am

yeah.. basics, basics, basics.. just keep your desktop with five icons and everything will be speedy and okay.. :mrgreen:
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