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Parge · 11th Apr 2012, 10:08

Quick Question on PCIe lanes

I have a Asus P8Z68 Deluxe. It has

2 x PCIe 2.0 x16 (x16 or dual x8)
1 x PCIe 2.0 x16 (x4 mode, black) *1
2 x PCIe 2.0 x1

If I put 2x GTX 480 in the PCIe x8 slots, am I ok putting an Asus Xonar DX in the last x4 slot, or will this impact the bandwidth of the two GPUs?

noizdaemon666 · 11th Apr 2012, 10:11

It shouldn't affect anything. It all adds up to be the same 20 PCI-E lanes no matter what config you use.

Edit: Elton's response makes more sense than this one lol

Elton · 11th Apr 2012, 10:55

The last X4 slot would run in X4 mode. No biggie.

tonpal · 11th Apr 2012, 11:49

If my understanding of the Z68 chipset is correct, the "graphics" PCIe slots are controlled directly from the CPU. The third x16 (physical) slot uses the PCIe lanes from the PCH so using it will not have any impact on the graphics performance.

I am not certain how Asus have allocated the 8 PCIe lanes from the PCH. There is a possibility that the x16 black slot shares lanes with the x1 slots.

Parge · 11th Apr 2012, 11:59

Quote:

Originally Posted by tonpal

If my understanding of the Z68 chipset is correct, the "graphics" PCIe slots are controlled directly from the CPU. The third x16 (physical) slot uses the PCIe lanes from the PCH so using it will not have any impact on the graphics performance.

I am not certain how Asus have allocated the 8 PCIe lanes from the PCH. There is a possibility that the x16 black slot shares lanes with the x1 slots.

Ok yeah, this is what I was thinking.

Should be ok I guess.

11th Apr 2012, 10:08	#1
Parge Do you even mod, bro? Join Date: Jul 2010 Location: London, UK Posts: 6,977	Quick Question on PCIe Lanes. Quick Question on PCIe lanes I have a Asus P8Z68 Deluxe. It has 2 x PCIe 2.0 x16 (x16 or dual x8) 1 x PCIe 2.0 x16 (x4 mode, black) *1 2 x PCIe 2.0 x1 If I put 2x GTX 480 in the PCIe x8 slots, am I ok putting an Asus Xonar DX in the last x4 slot, or will this impact the bandwidth of the two GPUs? __________________ Deep Silence 1 - 2500K @4.5Ghz - Gigabyte UD7 - GTX 670 - 16GB 1866mhz Tactical Tracer - 240GB Vertex 3 - Xonar DX - U3011 Pump/MCP 355 - CPU/EK Supreme HF Nickel Plexi - GPU/EK Nickel Acetal Full Cover - Rads/2x EK 240 XTX - Fans/6x Gentle Typhoon 1850s - Controller/BigNG

11th Apr 2012, 10:11	#2
noizdaemon666 I've been away far too long Join Date: Jun 2010 Location: Castleford Posts: 4,271	It shouldn't affect anything. It all adds up to be the same 20 PCI-E lanes no matter what config you use. Edit: Elton's response makes more sense than this one lol __________________ AMD A4 5300 @ 4GHz \| \| 4GB 1600 Patriot \| 128GB SSD \| 500GB Samsung HD501LJ \| 320GB Hitachi 2.5" \| CX430 PSU Last edited by noizdaemon666; 11th Apr 2012 at 10:58.

11th Apr 2012, 10:55	#3
Elton Proud Model M User Join Date: Jan 2009 Location: California Posts: 7,809	The last X4 slot would run in X4 mode. No biggie. __________________ There's good ideas and then there's terribly great ideas.

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11th Apr 2012, 11:49	#4
tonpal Hypermodder Join Date: Jul 2008 Location: Surrey, UK Posts: 621	If my understanding of the Z68 chipset is correct, the "graphics" PCIe slots are controlled directly from the CPU. The third x16 (physical) slot uses the PCIe lanes from the PCH so using it will not have any impact on the graphics performance. I am not certain how Asus have allocated the 8 PCIe lanes from the PCH. There is a possibility that the x16 black slot shares lanes with the x1 slots.