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Tom's Hardware > Forum > Motherboards & Memory > Motherboards > [Solved] P8Z68-V PRO/GEN3

[Solved] P8Z68-V PRO/GEN3

Forum Motherboards & Memory : Motherboards [Solved] P8Z68-V PRO/GEN3

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tha1   02-08-2012 at 11:28:05 PM

I was thinking of getting this board for my first build with the i7-2600k. I intend to use two graphic cards (radeon vs. geforce, still haven't decided) and noticed that if install two cards into the pcie x16 slots the speed is x8 for two cards whereas for one it is x16.

My question is: does the dual x8 speed mode make such a difference compared to the single x16? should i then just get a single more powerful graphics card? or are there boards which allow you to run two GPUs at dual x16 speeds?

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sosofm   02-09-2012 at 12:37:37 PM

The diference between x8/x8 and x16/x16 is 1%. Any dual gpu configuration have better results then 1 gpu ( the gpu's must be the same ).
In my opinion is better to buy one powerfull GPU. Buy an 7950 or 7970 and your problem is solved. And in the future add another one and your PC will fly.


Message edited by sosofm on 02-09-2012 at 12:37:58 PM
------------------------------ i7 2600 , AsRock P67 Extreme 6 ,2x4GB Corsair Vengeance 1600 , MSI 6950 2GB , HDD WD 640 AAKS , Corsair 620HX 620W , CPU cooler Zalman CNPS10X Performa , CoolerMaster 912, Philips Led 22"
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abekl   02-09-2012 at 01:13:03 PM

There are motherboards that will allow you to run two video cards at x16, but they are expensive, around 275-300.

Message quoted 1 times
Reply to abekl
edvinasm   02-09-2012 at 01:26:14 PM

abekl wrote :

There are motherboards that will allow you to run two video cards at x16, but they are expensive, around 275-300.



Current GPUs can't saturate PCI Express 2.0 8x, never mind the 16x or Gen 3.0. 16x becomes apparent when you are using PCI Express RAID or SSD. Other than that simply do not worry about 8x Vs 16x for another while (unless you are mad at over-clocking and/or going for coming GTX 690).

Reply to edvinasm
tha1   02-09-2012 at 03:01:08 PM

I've come to the decision of getting the radeon 7970 with the board and an i7-2600k. For one GPU it seems to run at 16x whereas in the future if I install a second for crossfire, they would both run at 8x each.

I noticed that the intel 1155 chipsets don't have motherboards that have two PCI express slot that can both run at 16x. They seem to always run at dual 8x upon installing a second GPU.

would the regression from 16x for the single to 8x for both still make only a marginal difference as in still 1%?

Otherwise I was thinking of getting a x79 motherboard that can support two GPUs at 16x, although apparently it seems that the processors that go with those are overpriced and don't make that much of a difference in terms of gaming...

Reply to tha1
sosofm   02-09-2012 at 03:14:36 PM

Buy what you choosed , not x79. With 7970 it will be a great gaming rig.

------------------------------ i7 2600 , AsRock P67 Extreme 6 ,2x4GB Corsair Vengeance 1600 , MSI 6950 2GB , HDD WD 640 AAKS , Corsair 620HX 620W , CPU cooler Zalman CNPS10X Performa , CoolerMaster 912, Philips Led 22"
Reply to sosofm
tha1   02-09-2012 at 04:18:06 PM

sosofm wrote :

Buy what you choosed , not x79. With 7970 it will be a great gaming rig.



so there is hardly any difference between 16x and 8x for a radeon 7970? although this is not the right forum to ask :p


Message edited by tha1 on 02-09-2012 at 04:18:59 PM
Reply to tha1
sosofm   02-10-2012 at 05:13:02 PM
Best answer

The diference between x8 dual and x16 dual is 3-4 FPS that is 1% read this http://www.tweaktown.com/articles/ [...] index.html

------------------------------ i7 2600 , AsRock P67 Extreme 6 ,2x4GB Corsair Vengeance 1600 , MSI 6950 2GB , HDD WD 640 AAKS , Corsair 620HX 620W , CPU cooler Zalman CNPS10X Performa , CoolerMaster 912, Philips Led 22"
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Nikorr   02-11-2012 at 03:15:39 AM

This topic has been closed by Nikorr

------------------------------ Where there's smoke, there's fire...

 

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