how many lanes would a PCIe sound card use?

[TickleMeRifle]

as per title. if a CPU has 24 lanes and i use x16 for the gpu, and have two x4 NVMe M.2 SSDs that would essentially mean my PCIe sound card would ultimately gimp my GPU to x8 no?

[Omega]

Just 1.

[Magma Dragoon]

Yes, the video card will operate in x8.

[vadim]

Integrated sound doesn't use CPU PCI-E lanes at all.
If you have 2 NVMe drives, PCIe lanes distribution depends on motherboard (and CPU, but motherboard also implies certain CPU).

[Bad 💀 Motha]

He said PCIE sound card, not onboard audio.

The ssds amd sound card would use lanes from chipset.

Gpu would use lanes from cpu.

[_I_]

look up the mobo manual to see whats disabled when you populate the nvme slots

[Bad 💀 Motha]

_I_ původně napsal:

look up the mobo manual to see whats disabled when you populate the nvme slots

Some manuals don't say this.
Asus ones always did.

If anything I know most of your sata ports will get disabled, but it might disable some PCIE slots also.

For a pcie audio card all it will require is PCIE X1 slot, thus 1x pcie lane. If the card fails to work in a pcie X1 slot due to NVME lane sharing, try the sound card in an X16/X8 slot

[Autumn_]

If it's going into an x1 slot, it's going to be routed through chipset, so no it won't gimp your GPU (not that it matters, most GPUs run fine on x8 lanes), and your chipset will have plenty of lane support, because NVMes will be routed through chipset too (unless you have a board that routes the NVMes to the CPU, which if I'm not mistaken the threadripper boards do), so don't worry about it, it's fine.

[iceman1980]

Quokka původně napsal:

as per title. if a CPU has 24 lanes and i use x16 for the gpu, and have two x4 NVMe M.2 SSDs that would essentially mean my PCIe sound card would ultimately gimp my GPU to x8 no?

Depends on the bit-rate.

Bit-depth * sampling rate * channel count gives you your rough bit-rate per second.

Standard stereo rate = 384,000 samples * 32 * 2 (dual channels)
= 24,576,000 bits per second

It doesn't even come close to a PCI-E 3.0 single bus rate. 1 GB/s If you put it into a PCi-E x1 3.0 slot I wouldn't worry too much you've still got 23 lanes available. So do the math.

1. x16 slot occupied by the GPU
2. 2 * x4 NVMe drives = 8 + 16 = 24 so you'd be losing a lot of bandwidth but realistically you can live with a x8 quite fine.

[vadim]

Product ∏ původně napsal:

So do the math.

1. x16 slot occupied by the GPU
2. 2 * x4 NVMe drives = 8 + 16 = 24 so you'd be losing a lot of bandwidth but realistically you can live with a x8 quite fine.

Your "math" is wrong. This quote should hint you the correct answer:

Autumn_ původně napsal:

If it's going into an x1 slot, it's going to be routed through chipset, so no it won't gimp your GPU

[Supafly]

vadim původně napsal:

Product ∏ původně napsal:

So do the math.

1. x16 slot occupied by the GPU
2. 2 * x4 NVMe drives = 8 + 16 = 24 so you'd be losing a lot of bandwidth but realistically you can live with a x8 quite fine.

Your "math" is wrong.

So maybe correct them?

[vadim]

Suicidal Monkey původně napsal:

vadim původně napsal:

Your "math" is wrong.

So maybe correct them?

I bet, he talks about Ryzen. AMD claims it has 24 PCI-E lanes, which, as we can see, misleads consumers. They imagine they can use all these lines as they want. In this regard, Intel's approach, which calls the lines hardware assigned to the chipset as DMI lines, looks more honest.

[Supafly]

vadim původně napsal:

Suicidal Monkey původně napsal:

So maybe correct them?

I bet, he talks about Ryzen. AMD claims it has 24 PCI-E lanes, which, as we can see, misleads consumers. They imagine they can use all these lines as they want. In this regard, Intel's approach, which calls the lines hardware assigned to the chipset as DMI lines, looks more honest.

Not what I said. If their math is wrong provide the correction. I'd do it myself but don't know what the correct math is, hence why I said it.

[vadim]

Suicidal Monkey původně napsal:

Not what I said. If their math is wrong provide the correction. I'd do it myself but don't know what the correct math is, hence why I said it.

Autumn gave correct answer: it's all depends on motherboard. If all 3 slots connected to CPU, graphic will work in x8 mode, because 16+4+4 exceeds 20 available PCI-E lanes.
If at least one of slots connected to chipset, graphic can work in x16 mode.

Whether OP has dedicated sound card or not doesn't make any difference at all. It doesn't use CPU lanes.

[Supafly]

vadim původně napsal:

Suicidal Monkey původně napsal:

Not what I said. If their math is wrong provide the correction. I'd do it myself but don't know what the correct math is, hence why I said it.

Autumn gave correct answer: it's all depends on motherboard. If all 3 slots connected to CPU, graphic will work in x8 mode, because 16+4+4 exceeds 20 available PCI-E lanes.
If at least one of slots connected to chipset, graphic can work in x16 mode.

Whether OP has dedicated sound card or not doesn't make any difference at all. It doesn't use CPU lanes.

Thanks. What I was thinking but it's one of those days where I've already made enough silly mistakes I didn't want to make another correction that would have been wrong. I do enough of that on these forums as it is.

[Omega]

levet.byck původně napsal:

Just a newbie question..
Isn't there a 'controller'- or something that can merge two (or more) pci- or sata-slots (and nvme?) if the data comes from the same type of 'hardware?/card?/driver?' (I might have to write this differently)

Some high-end motherboards have PCI-e switches.