Geforce 9 Series

martin9887 · 5 Aug 2007 at 15:11

Yeah, That's basically what I meant. I didn't mean to imply a huge difference, sorry.

mdjmcnally · 5 Aug 2007 at 15:12

Only reason from what I understand is that PCI-E 2.x will provide even more power for those nice fast GPU's.

MumboJumbo · 5 Aug 2007 at 16:46

Jokester said:
He's right, but we're talking about a difference of only a percent or two. It's like the difference between running x16 and x8 at the moment. Basically not something to get worried about at the moment. It won't be a few years before there will be a significant difference between PCI-E 1 and PCI-E 2 as current GPUs don't max out current PCI-E slots.

Jokester

On the P35 boards they can do crossfire but the second is only a x4 slot. Would that still give you good performance on a x16 card? Because i was thinking to my self, why would i bother if its only x4 and not x16

Reality|Bites · 5 Aug 2007 at 23:32

The move to PCI-E 2.0 is to raise the maximum voltage which the PCI-E slot can supply from 75W to 150W

ps3ud0 · 5 Aug 2007 at 23:41

8igdave said:
On the P35 boards they can do crossfire but the second is only a x4 slot. Would that still give you good performance on a x16 card? Because i was thinking to my self, why would i bother if its only x4 and not x16

Id assume that Intel would have already considered that when designing the chipset, otherwise its a poor oversight. If its been designed with that in mind, then it stands to reason that current 16x cards do not use more bandwidth than a 4x lane can provide, which I could believe...

EDIT: PCIe 16x = 8GB/s; PCIe 4x = 2GB/s ~ AGP 8x...

Hmmm perhaps PCIe 4x could be limiting - I wouldnt know the latest GFX cards bandwidths...

ps3ud0 :cool:

Jokester · 5 Aug 2007 at 23:43

My 8800Ultra was losing about 20% performance in a x4 slot so it's not ideal.

Jokester

Reality|Bites · 5 Aug 2007 at 23:47

It was the same as the Ti4400(4x) and Ti4800se(8x) the Ti4800se wasn't any faster.

Scougar · 6 Aug 2007 at 10:41

ps3ud0 said:
Id assume that Intel would have already considered that when designing the chipset, otherwise its a poor oversight. If its been designed with that in mind, then it stands to reason that current 16x cards do not use more bandwidth than a 4x lane can provide, which I could believe...

EDIT: PCIe 16x = 8GB/s; PCIe 4x = 2GB/s ~ AGP 8x...

Hmmm perhaps PCIe 4x could be limiting - I wouldnt know the latest GFX cards bandwidths...

ps3ud0

I can tell you that my x1950xt was not performing as well as it should have done thanks to the x4 pci-e slot I was running it in. Somewhere between 5-10% at best guess in performance decrease (maybe more but I wouldn't like to over estimate, really would have needed at least pci-e x8 to make it effective).

Matthew

MumboJumbo · 6 Aug 2007 at 12:14

Jokester said:
My 8800Ultra was losing about 20% performance in a x4 slot so it's not ideal.

Jokester

With the bad drivers and all i thought sli didn't give much of a bonus right now for the price anyway. So with the added loss of 20% surely they arnt really doing a lot extra?

Jokester · 8 Aug 2007 at 11:03

8igdave said:
With the bad drivers and all i thought sli didn't give much of a bonus right now for the price anyway. So with the added loss of 20% surely they arnt really doing a lot extra?

That was with a single card rather than SLI.

Jokester

LoadsaMoney · 8 Aug 2007 at 15:14

Thinking about it, i can't see the 9800's coming out in November now either as is only 3x months away, if they were, then there would have been some info floating about by now, look at how cards in the past have had specs leaked, shots leaked etc..., months before they were due out, yet we've had absolutely nothing at all about the 9800's, as Jokester said it was just a post on a forum.

Parallax · 8 Aug 2007 at 15:23

All the more reason to plunder for a GTX then

Reality|Bites · 8 Aug 2007 at 15:30

If the money is burning a hole in your pocket get a GTX if not wait for the next best thing.

deuse · 8 Aug 2007 at 15:33

P35 does already support the new PCIe standard

http://www.bit-tech.net/news/2007/06/06/p35_supports_pcie_2/1

things are looking up

SS-89 · 8 Aug 2007 at 15:36

Reality|Bites said:
If the money is burning a hole in your pocket get a GTX if not wait for the next best thing.

Youll be waiting forever at that rate.

Jokester · 8 Aug 2007 at 15:36

The chipset might support it, doesn't mean the rest of the motherboard does.

Jokester

Parallax · 8 Aug 2007 at 15:38

deuse said:
P35 does already support the new PCIe standard

http://www.bit-tech.net/news/2007/06/06/p35_supports_pcie_2/1

things are looking up

Well I'll be linux lover!! That is some easter egg.. Heres me thinking I'll have to upgrade to X38

deuse · 8 Aug 2007 at 15:44

Jokester said:
The chipset might support it, doesn't mean the rest of the motherboard does.

Jokester

maybe,but a least there is light at the end of the tunnel ..yes ??

Scougar · 8 Aug 2007 at 15:51

You wont lose 'that' much money on a GTX anyway even if you did buy one now and sold it shortly before the 9xxx series were actually released.

If you buy a 2nd hand gtx then even less money would be lost

Matthew

fornowagain · 8 Aug 2007 at 17:41

PCI-e 2.0 same number of serial lanes, just doubles the bandwidth for each lane from the current 250MB/s to 500MB/s. And doubles the slot power.

Currently PCI-e 1.1 x16 is 16x250 = 4GB/s in both directions, 8GB/s duplex. They quote duplex, but most apps send more to the card than it's sending back to the CPU. AGP x8 parallel bus is 8x66Mhz at 32bit or 2GB/s

http://www.pcisig.com/specifications/pciexpress/base2#CEM2

Its worth noting that x8 (2GB/s) can be saturated with a 8800

http://www.tomshardware.co.uk/2007/03/27/pci_express_scaling_analysis_uk/page8.html