Author Topic: PCI/E question (Read 567 times)

Schutt · « **Reply #15 on:** June 13, 2005, 06:24:42 AM »

Ho !
True, some via chipsets dont support dual core amd cpus at the moment. Good point. So its not all 939 motherboards support dual core AMD cpus.

Kev367th · « **Reply #16 on:** June 13, 2005, 06:45:59 AM »

AMD now has an X2 compatible list up on their site -

http://www2.amd.com/us-en/recmobo/ResultsHandler/1,,30_182_869_9460^9461~73649,00.html

I believe it is only the K8T890 chipset with problems, haven't heard of any others yet.

StarOfAfrica2 · « **Reply #17 on:** June 13, 2005, 12:30:46 PM »

Quote

Originally posted by Schutt

11. Something else none mentioned, PCIe slots come in x1 x2 x4 x8 x16. While this sounds trivial it is not, because you can have "open ended" slots where you can plug in bigger cards and you can have slots that look like bigger slots but have less electrical contacts, so a PCIe x4 slot might actually only be a x2 slot, an x16 slot might only be x4 or x8. On SLI boards currently are 2 "x16" slots but electrical its only 1 x16 OR 2 x8.

I simply didnt think it was worth mentioning, it didnt really have much to do with the conversation at hand. Besides, how many motherboards do you see with anything besides x16 and x1 slots?

As for the SLI, I was under the impression that you could run one card at x16, but if you run two cards in the two x16 slots, they both operate at x8?

Kev367th · « **Reply #18 on:** June 13, 2005, 01:26:14 PM »

Yup, buts that not an SLI limitation, its the way the mobo manufacturers implemented it. No reason why you can't have 2x16 lanes.

Schutt · « **Reply #19 on:** June 13, 2005, 04:13:37 PM »

The nforce4 chip offers 22 (or 20?) pcie lanes in total, so there is no way a pcie motherboard with the nforce4 chip can have two times x16.

SoA2 yes thats what i meant. You can run one card as x16 or two cards with x8. Sorry if i didnt explain it clear. What i dont know is if you can still use the other slot as a pcie x1 slot when you have only one card.

I see some motherboards with 1 x2 or 1 x4 slot, i think that is to accomodate future raid controllers that come as PCIe x2 or x4 type card, but not sure.

StarOfAfrica2 · « **Reply #20 on:** June 14, 2005, 01:27:02 PM »

Quote

Originally posted by Kev367th
Yup, buts that not an SLI limitation, its the way the mobo manufacturers implemented it. No reason why you can't have 2x16 lanes.

Ahhh, ok. I thought it was an inherent limitation for two GPUs linked together like that. Not that it really matters right now, they cant take advantage of it if they did open both up to run at x16 simultaneously.

Kev367th · « **Reply #21 on:** June 14, 2005, 02:22:15 PM »

I think some boards have already appeared with 2 x 16 lanes e.g. Abits A8N.
But as you said, still couldn't take advantage of it.

Now - once we see dual/multi core CPU's and games etc that use them fully, there may be some use for 2x 16 lanes then.

Overlag · « **Reply #22 on:** June 14, 2005, 02:54:21 PM »

Abits AN8 only has 1 x16 slot????