Help Finding A Motherboard (AM3+, PCI-e 3.0)

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rhydiansmith

rhydiansmith

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Apr 20, 2010
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Hello
I am trying to find a motherboard that supports the AMD AM3+ Socket (For the AMD FX 6300) but also supports PCI-e 3.0 for a graphics card that I already own. I have not found any so far, and I am wondering if there are any motherboards that meet this specification. If so, could you list some for me?
Thanks
R

Edit - Is it absolutely neccesary to have PCI-e 3.0 for my graphics card (XFX Radeon HD 7750)? Will it work with 2.0?
 
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Bejusek

Bejusek

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No. PCI-E 2.0 x16 is more than enough for every card (Titan included).

The only board for AMD AM3+ with PCI-E 3.0 is Asus Sabertooth 990FX/GEN3 R2.0. But it doesn't make sense to pay extra for something that you don't need.
 
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murrayhart

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Apr 27, 2013
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Second This

 
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sthackrey

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Dec 17, 2013
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Unfortunately its not absolutely necessary that the PCI-e 3 card will work in the older mobos. Many are experiencing freezing at BIOS (me included) even if you flash the BIOS. I have the older ASUS sabertooth 990fx R2.0 mobo and its doesnt support my EVGA GTX760 4gb card in the primary pcie slots (only the pcie x4 slot)
 
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Stallingrad

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I have the Asus M5A99x EVO R2.0 with an EVGA GTX 760 4Gb in the pci-e 2.0x16 slot and it runs beautifully. I'm getting a second 760 and I don't know what performance I'll expect to see. The mobo only does x8 for both slots in SLI.
 
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GObonzo

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Quoted from Crashman, part of this thread :

"There's a reason why nobody is geeking out over PCIe 3.0 on a 990FX chipset: It's not real. The 990FX doesn't have PCIe 3.0, it only has PCIe 2.0 When you put a PLX PCIe 3.0 bridge on a PCIe 2.0 controller, the system will see that the card sits on a PCIe 3.0 connection, but you'll still be limited to the bandwidth of the chipset's PCIe 2.0 controller.

The chipset has 32 lanes at PCIe 2.0. The bridge allows 16 lanes of PCIe 2.0 to split to 32-lanes. But the bridge itself is PCIe 3.0, so every card on the bridge will be seen by the system as having a PCIe 3.0 connection even though bandwidth to and from the bridge is limited to PCIe 2.0 x16.

That means a single card can transfer at PCIe 2.0 x16 rates. Because SLI and CrossFire use the same data and it’s a repeater bridge (same data to multiple cards), two cards also get PCIe 2.0 x16 data rate.

So, what's the advantage of using a PCIe 3.0 bridge on a PCIe 2.0 controller? Because PCIe 3.0 x8 has the same transfer rate as PCIe 2.0 x16, the bridge allows three-card (x16-x8-x8) and four-card (x8-x8-x8-x8) configurations to still have PCIe 2.0 x16 bandwidth for each card, whereas a PCIe 2.0 version of this bridge would drop the transfer rate to PCIe 2.0 x8 per-card.

In other words, the benefits only apply to 3 and 4 card configurations. And even then, they're dubious."
 
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GObonzo

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"When you put a PLX PCIe 3.0 bridge on a PCIe 2.0 controller, the system will see that the card sits on a PCIe 3.0 connection, but you'll still be limited to the bandwidth of the chipset's PCIe 2.0 controller."

read the comments related to the video you have posted. easy information to look up elsewhere related to the board also.
 
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Andy_61

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Intel stole tech from AMD by reverse engineering "hyper transport" and that's the only reason Intel pulled ahead. Corporate businesses play a dirty market game making consumers pay a higher price for whitewashed stolen tech.
 
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Eric McElfresh

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If this is true, AMD is clearly wasting potential, they still only have no true pcie 3 boards for their main processor series apparently.
 
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