How many PCI lanes does fx 8350 have?

[the jolly roger]

So im planning on getting an i5 4690, but it only has 16 pci lanes, so it can run 1 gpu (or 2 in 8x/8x) and if i want to add a sound card (i do) the GPU will be reduced to 8x, so i cant find info anywhere on how many pci lanes does the FX 8350 have, since my upgrade path is a triple 1080p and crossfire r9 290 setup.

 

Thanks

Edit: rather than 8350, how about 8370?

[SuperPug]

38 usable pcie lanes iirc. You can run two cards in pcie 16x or 4 cards in pcie 8x.

[Aniallation]

So im planning on getting an i5 4690, but it only has 16 pci lanes, so it can run 1 gpu (or 2 in 8x/8x) and if i want to add a sound card (i do) the GPU will be reduced to 8x, so i cant find info anywhere on how many pci lanes does the FX 8350 have, since my upgrade path is a triple 1080p and crossfire r9 290 setup.

 

Thanks

Edit: rather than 8350, how about 8370?

PCIe lanes are based on the chipset/motherboard on AMD instead of the CPU like Intel.

[the jolly roger]

PCIe lanes are based on the chipset/motherboard on AMD instead of the CPU like Intel.

do any 990fx board..... how many lanes does it have?

[Aniallation]

do any 990fx board..... how many lanes does it have?

970, 980, 990X = 22 lanes

990FX = 38 lanes

[the jolly roger]

970, 980, 990X = 22 lanes

990FX = 38 lanes

so what i am understanding is that for multi-GPU setups i should get AMD?

[The_Evenger]

i know the gigabyte 990FXA-UD3 (my board) supports crossfire w/ full bandwidth to both cards, so it is good for duel cards

 

Edit: but we haven't seen any bandwidth limitations from two cards running on 8x in an Intel cpu w/ a PCI3.0 card, so it's what you make of it.

[79wjd]

so what i am understanding is that for multi-GPU setups i should get AMD?

Intel motherboards have something called a PLX chip, which can "give" you more lanes. (four-way SLI/XFIRE is possible on z97, which based on the cpu alone only support a max of 16 lanes). (But those boards tend be very expensive unfortunately -- $200+). Currently the cheapest z97 board with more than 16 PCIe lanes: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128702&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= ($190) 

[Aniallation]

so what i am understanding is that for multi-GPU setups i should get AMD?

Thing is that with AMD they're only PCIe 2.0 lanes, so each lane is half the bandwidth of a PCIe 3.0 lane.

 

16 Intel (PCIe 3.0) lanes = 32 AMD (PCIe 2.0) lanes

 

Either will be good. 

 

8x/8x PCIe 3.0 SLI/Crossfire (Z97) will be the same as 16x/16x PCIe 2.0 SLI/CF (990FX)

[SuperPug]

PCIe lanes are based on the chipset/motherboard on AMD instead of the CPU like Intel.

 

Intel is the same... in a way

[the jolly roger]

Intel motherboards have something called a PLX chip, which can "give" you more lanes. (four-way SLI/XFIRE is possible on z97, which based on the cpu alone only support a max of 16 lanes). (But those boards tend be very expensive unfortunately -- $200+). Currently the cheapest z97 board with more than 16 PCIe lanes: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128702&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= ($190) 

ya that is totally out of budget

[the jolly roger]

Thing is that with AMD they're only PCIe 2.0 lanes, so each lane is half the bandwidth of a PCIe 3.0 lane.

 

16 Intel (PCIe 3.0) lanes = 32 AMD (PCIe 2.0) lanes

 

Either will be good. 

 

8x/8x PCIe 3.0 SLI/Crossfire (Z97) will be the same as 16x/16x PCIe 2.0 SLI/CF (990FX)

so its pretty much the same stuff? I watch Linus's video on SLI scaling with various PCI bandwith size, so a pci 3.0 8x/8x will be just a tiny bit slow than 16x/16x? By tiny difference i mean a couple of FPS, right?

[Shroomster]

38 usable pcie lanes iirc. You can run two cards in pcie 16x or 4 cards in pcie 8x.

Sadly there are no boards for 4way cards on am3+.

[Aniallation]

so its pretty much the same stuff? I watch Linus's video on SLI scaling with various PCI bandwith size, so a pci 3.0 8x/8x will be just a tiny bit slow than 16x/16x? By tiny difference i mean a couple of FPS, right?

PCIe 3.0 8x/8x is exactly the same bandwidth as PCIe 2.0 16x/16x

[SuperPug]

Sadly there are no boards for 4way cards on am3+.

 

I thought atleast the GA-990FXA-UD7 could?

[Priller]

I thought atleast the GA-990FXA-UD7 could?

 

Yup. That is the only one I know of and the one I use.

[the jolly roger]

PCIe 3.0 8x/8x is exactly the same bandwidth as PCIe 2.0 16x/16x

so is it worth it switching over to amd?

[harrynowl]

so is it worth it switching over to amd?

no.

 

gen3 8x 8x is gen2 16x 16x

 

so you don't gain pcie bandwidth

 

but you lose the cpu performance, in some games the 8350 can be a big bottleneck for sli.

[Shroomster]

Yup. That is the only one I know of and the one I use.

Oh damn. I havent noticed that.

[Aniallation]

so is it worth it switching over to amd?

If you're just gaming then no. AMD will only be better if you also do other things that can take advantage of as many cores as is available, such as video editing and rendering. 

[79wjd]

PCIe 3.0 8x/8x is exactly the same bandwidth as PCIe 2.0 16x/16x

The bandwidth is the same, BUT the amount of pcie devices you can use is different. 

 

So, 3.0 x8x8 might be the same as 2.0x16, but on AMD (2.0x8x8) you can also use a soundcard (which he wants). 

 

@the jolly roger , personally, I'd just lose the sound card and go Intel. on board audio is pretty good these days. 

[Aniallation]

The bandwidth is the same, BUT the amount of pcie devices you can use is different. 

 

So, 3.0 x8x8 might be the same as 2.0x16, but on AMD (2.0x8x8) you can also use a soundcard (which he wants). 

 

@The jolly roger , personally, I'd just lose the sound card and go Intel. on board audio is pretty good these days. 

Yes, which is comprehendable on your own if you read what I stated.  

 

With Intel you get 16 PCIe lanes, so figuratively speaking, Haswell has 32 PCIe 2.0 lanes whereas 990FX has 38, leaving 6 extra lanes free if two GPUs are running in x16/x16

[79wjd]

Yes, which is comprehendable on your own if you read what I stated.  

 

With Intel you get 16 PCIe lanes, so figuratively speaking, Haswell has 32 PCIe 2.0 lanes whereas 990FX has 38, leaving 6 extra lanes free if two GPUs are running in x16/x16

Oh, I didn't realize you could run two 3.0x16 slots (which normally run at 3.0x8x8) as PCIE slot in 2.0xx16x16 (or 2.0x8x8 and still have left over lanes). 

[Faa]

Yes, which is comprehendable on your own if you read what I stated.  

 

With Intel you get 16 PCIe lanes, so figuratively speaking, Haswell has 32 PCIe 2.0 lanes whereas 990FX has 38, leaving 6 extra lanes free if two GPUs are running in x16/x16

There are only 32 PCIe lanes in the Northbridge and rest are on the Southbridge. Intel offers 3.0 x4 on the Southbridge.