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I am currently running an Asus P8-Z68 V-Pro Gen 3 motherboard, which supports PCI-E 3.0, as per the manufacturers website.

Since I bought the board I have be running an Intel Core i7 2600k.

Recently, I purchased a Palit GTX 680 Jetstream.

Overall I am very happy with the card, but one minor gripe I am having is that it is not linking at PCI-E 3.0 Speeds.

I have been told that the 2600k does not support PCI-E 3.0 link speeds, and accepted.

However, tonight, I saw this review, which shows a PCI-E AMD Card running on a 2600k @ PCI-E 3.0 link speeds. http://www.pureoverclock.com/Review-detail/sapphire-7970-vapor-x/4/

Could any of you possibly shed some light on the situation, as it is starting to confuse me,

Thanks in advance,


asked Aug 29 '12 at 15:41

Tim%20Fontana's gravatar image

Tim Fontana

closed Sep 01 '12 at 12:15

Someone help me pl0x :O

(Aug 31 '12 at 06:50) Tim Fontana Tim%20Fontana's gravatar image

The question has been closed for the following reason "The question is answered, right answer was accepted" by Tim Fontana Sep 01 '12 at 12:15

that image shows that the board supports pci-e 3.0 but it is not running at 16x 3.0, i instead it is running at 16x 1.1 speeds

(I have no idea why it is running at 1.1, it should be shows as @x16 2.0 so I think that is an error with GPU-Z

PCIe 3 needs CPU support (and nothing is really making use of the added data rate of 3.0 yet so there is not need to worry about that yet)

PS for that motherboard, if you are using a sealed water cooler such as the Corsair H80, then you will need a side panel fan that can provide direct airflow to the VRM heatsinks on the motherboard, or you will risk a blown VRM when overclocking, or a bad overclock due to the VRM protection kicking in, which throttles the CPU.

answered Aug 31 '12 at 12:11

Razor512's gravatar image


I think it throttles down to PCI-E 1.1 when not in use.

The thing is, mine doesn't show that the board supports 3.0 anyway.

As for the cooler, I am using the NH-D14, with lots of cooling through the case, I am running at 4.8Ghz, with no heat issues or anything.

But I have airflow through the whole case, and nothing feels hot, so I think it's okay :D

(Aug 31 '12 at 13:32) Tim Fontana Tim%20Fontana's gravatar image

I figured out why the system was showing pci-e 3.0

the 7970 has native support for PCI-e 3.0.

(the pci-e 1.1 thing may really be some kind of power saving)

(Aug 31 '12 at 14:43) Razor512 Razor512's gravatar image

the GTX 680 also has native PCI-E 3.0 support, does it not?

PCI-E 1.1 is power saving, mine does the same.

(Aug 31 '12 at 21:27) Tim Fontana Tim%20Fontana's gravatar image

I looked more into that and it seems that the card is what reports the interface and not the motherboard. ATI does it differently

The GTX 680 only does it when it is on a motherboatd and CPU combo that supports pci express 3

the vast majority of screenshots had the card reporting only pcie-2.0

the card also shows no benefit in pci-e 3 mode

(Aug 31 '12 at 22:24) Razor512 Razor512's gravatar image

Ah, I understand a little better. Thank you for you help, I guess I'll just have to wait until I get Haswell before I can get full PCI-E 3.0, but if it makes no difference, I guess it doesn't matter anyway

(Sep 01 '12 at 09:46) Tim Fontana Tim%20Fontana's gravatar image

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Asked: Aug 29 '12 at 15:41

Seen: 1,201 times

Last updated: Sep 01 '12 at 12:15