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Altera_Forum
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15 years ago

Question about PCIe speed

I have been working on the chaining DMA example project for PCIe provided by Altera. I am a bit confused about what performance I should expect though. When sending 16.384 GBytes of data f...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I can't speak exactly to your scenario, but my situation is as follows. System setup:

Motherboard: Asus AT5IONT-I

OS: Windows 7

FPGA: EP4CGX15BF14C7 (gen 1.0 x1 lane)

Design: PCI Express to External Memory Reference Design

My transfer speeds were (16kB transfer sizes):

Theoretical limit: 250MB/s

Actual (FPGA->computer): 198MB/s

Actual (computer->FPGA): 120MB/s

I hope that provides a more concrete basis for comparison.