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#1
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n650sli speed of second pci-e slot?
howdy,
i've got a n650sli mobo. anyone know the speed of the second pci-e slot? i was wondering about using my one vid card in it to open airflow around the chipset cooler. (vid card is a 2900xt 1gb) |
#2
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n650sli speed of second pci-e slot?
right out of the manual....page 11 note 2....in SLI mode the 2 PCI-e slots
can run at up to x8 ...in normal mode only the 1st PCI-E slot is available (!!!!) and it can runat up to x16 That NB heatsink getting too hot?? Mine was running at 64C when I OC'd it jumped to 72c. I solved my problem by installing an Antec Spot Cool Adjustable System Cooler(FAN) 3 speed 2000/3000 RPM 23-33dba 15-22cfm...$17.00 Can. I screwed it to one of the mobo standoff connectors and with its flexible arm pointed it at the NB sink pushing the air out towards the back exhaust fan. Temp dropped down to 52c ...60c under load....like Orthos for 4 hours. here is a pic http://www.antec.com/us/productDetails.php?ProdID=75018 Zalman makes one as well ...but harder to find http://www.zalman.co.kr/eng/product/...p?idx=15&code= hope this helps peter "a. nonymous" wrote in message ... howdy, i've got a n650sli mobo. anyone know the speed of the second pci-e slot? i was wondering about using my one vid card in it to open airflow around the chipset cooler. (vid card is a 2900xt 1gb) |
#3
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n650sli speed of second pci-e slot?
a. nonymous wrote:
howdy, i've got a n650sli mobo. anyone know the speed of the second pci-e slot? i was wondering about using my one vid card in it to open airflow around the chipset cooler. (vid card is a 2900xt 1gb) On PDF page 8, there is a block diagram. The modes are x16 or x8 / x8. You change modes by pulling and flipping the paddle card. When in the secondary slot, the card will be getting x8. I might be slower by 5% to 10%, and the percentage varies according to benchmark (or game being used). Some games use more bandwidth than others. http://america.giga-byte.com/FileLis...0sli_ds4_e.pdf Paul |
#4
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n650sli speed of second pci-e slot?
Did I mis understand the note2 on page 11??
I took that to mean that with one video card you need to use slot 1 ...slot 2 would not work with only one video card..its for SLI mode only. I have that MOBO but do not feel like trying it right now...I am tired..it was a tough day..whine...whine.....heheh peter "Paul" wrote in message ... a. nonymous wrote: howdy, i've got a n650sli mobo. anyone know the speed of the second pci-e slot? i was wondering about using my one vid card in it to open airflow around the chipset cooler. (vid card is a 2900xt 1gb) On PDF page 8, there is a block diagram. The modes are x16 or x8 / x8. You change modes by pulling and flipping the paddle card. When in the secondary slot, the card will be getting x8. I might be slower by 5% to 10%, and the percentage varies according to benchmark (or game being used). Some games use more bandwidth than others. http://america.giga-byte.com/FileLis...0sli_ds4_e.pdf Paul |
#5
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n650sli speed of second pci-e slot?
peter wrote:
Did I mis understand the note2 on page 11?? I took that to mean that with one video card you need to use slot 1 ...slot 2 would not work with only one video card..its for SLI mode only. I have that MOBO but do not feel like trying it right now...I am tired..it was a tough day..whine...whine.....heheh peter "Paul" wrote in message ... a. nonymous wrote: howdy, i've got a n650sli mobo. anyone know the speed of the second pci-e slot? i was wondering about using my one vid card in it to open airflow around the chipset cooler. (vid card is a 2900xt 1gb) On PDF page 8, there is a block diagram. The modes are x16 or x8 / x8. You change modes by pulling and flipping the paddle card. When in the secondary slot, the card will be getting x8. I might be slower by 5% to 10%, and the percentage varies according to benchmark (or game being used). Some games use more bandwidth than others. http://america.giga-byte.com/FileLis...0sli_ds4_e.pdf Paul Some motherboards that do SLI, arrange the two modes to be x16/x1 and x8/x8. In that case, the secondary slot always works. But to do that, there has to be enough "left over" x1 lanes, to set up that routing. The Northbridges where that was done, had 20 or 21 lanes total to work with. When I looked at the Nvidia page for the 600 series, I think the C55 has a total of 18 PCI Express lanes, so you could do x16,x1,x1 or x8,x8,x1,x1. And that means the Gigabyte manual page is probably correct as it stands. With the paddle card in its two usable positions, the slots can be: ------ Primary slot = x16 ------ Secondary slot = None or ------ Primary slot = x8 ------ Secondary slot = x8 (Third column from the left is 650i SLI) http://www.nvidia.com/page/nforce_600i_tech_specs.html Some block diagrams for reference. With the Hypertransport bus on the bottom, that makes it easy for a chip company to mix and match things, to make different product offerings. For example, the 680i LT shown here, uses a Southbridge that has its own collection of PCI Express lanes, and that is how they end up with two true x16 slots in that case. No need for a paddle card with the 680i LT block diagram. 650i http://img.clubic.com/photo/00468803.jpg 680i LT http://img.clubic.com/photo/00475755.jpg The main advantage of the 650i, would be the ability to make a lower priced motherboard. Even with x8/x8, the board would still be good. x8 is roughly the same as AGP 8X (2GB/sec versus 2.133GB/sec). Paul |
#6
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n650sli speed of second pci-e slot?
In article buuui.44209$rX4.17827@pd7urf2no, says...
That NB heatsink getting too hot?? Mine was running at 64C when I OC'd it jumped to 72c. :-) I slapped a swiftech NB waterblock on to mine and it runs nice and cool. Had to use the AMD style mounting system funnily enough, but it works a treat. -Peter -- ========================================= firstname dot lastname at gmail fullstop com |
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