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B450 chipset PCIE lane availability for GPU + M.2 |
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abhishekkalyani ![]() Newbie ![]() ![]() Joined: 16 Jan 2022 Location: India Status: Offline Points: 35 |
![]() ![]() ![]() ![]() ![]() Posted: 16 Jan 2022 at 11:39pm |
Hi,
I am planning to build my system with Ryzen 5 3600 in a B450 mobo(My choice are ASRock B450M Pro4 or MSI B450M Pro-VDH Max) Now I am also using a GTX 1050 TI GPU with it. So if I Install a M.2 NVME SSD, as far as I know that B450 mobo dont have its own PCIE 3.0 x4 lanes for M.2 slot. So it uses CPU's lanes for the same. So now, if I install it, will my GPU will run at x8 lanes? or My GPU will continue to to run at x16? But can it be possible, will the B450 be able to use 4 lanes from my CPU's(3000 series ryzen) total 20! |
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Xaltar ![]() Moderator Group ![]() ![]() Joined: 16 May 2015 Location: Europe Status: Offline Points: 23993 |
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With the 3600 you will be running at x16. Not that it matters at all with a 1050Ti anyway. The number of lanes multiplied by the throughput of the PCIe generation determine the maximum bandwidth between the CPU and GPU. Even higher end GPUs (like the RTX 2080) struggle to saturate the full PCIe 3.0 x16 bandwidth. My point is, x8 is more than enough bandwidth for 90% of GPUs and x16 will not provide any measurable performance increase in most cases. |
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abhishekkalyani ![]() Newbie ![]() ![]() Joined: 16 Jan 2022 Location: India Status: Offline Points: 35 |
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Yes GTX 1050 TI will never use full capacity of 16 lanes. But my question is whatever the GPU is, will it be able to use all 16 lanes on B450 mobo with M.2 NvME SSD in it?
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Xaltar ![]() Moderator Group ![]() ![]() Joined: 16 May 2015 Location: Europe Status: Offline Points: 23993 |
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I already answered that
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