PCIe test with riser cable

Direct Connection

AIDA64 GPGPU (MB/s)
Read 1248, 12437, 12426
Write 11623, 11604, 11646

PCIe Latency Test (ms)
Packet Size (KiB); Pageable; Pinned
1; 0.040265; 0.042167
8; 0.047950; 0.047282
16; 0.057731; 0.052427
32; 0.076640; 0.062806
128; 0.198954; 0.123327
256; 0.364603; 0.182990
512; 0.562191; 0.346524
1024; 1.027076; 0.677450
2048; 1.676829; 1.336140

1; 0.039920; 0.042248
8; 0.048005; 0.047318
16; 0.057354; 0.052375
32; 0.076629; 0.062704
128; 0.196658; 0.123894
256; 0.363511; 0.182576
512; 0.558801; 0.345915
1024; 0.983239; 0.676343
2048; 1.847371; 1.334383

1; 0.040188; 0.042039
8; 0.047939; 0.047283
16; 0.057480; 0.052357
32; 0.076561; 0.062809
128; 0.199549; 0.123259
256; 0.361799; 0.182617
512; 0.558961; 0.345733
1024; 0.927380; 0.674977
2048; 1.668211; 1.332857

Riser Cable (PCIe Gen 3 compatible)

AIDA64 GPGPU (MB/s)
Read 12483, 12438, 12443
Write 11603, 11617, 11611

PCIe Latency Test (ms)
Packet Size (KiB); Pageable; Pinned
1; 0.041235; 0.043434
8; 0.049043; 0.048330
16; 0.058670; 0.053735
32; 0.078590; 0.064784
128; 0.201592; 0.124792
256; 0.374129; 0.184435
512; 0.564198; 0.348211
1024; 0.964478; 0.700313
2048; 1.747830; 1.341974

1; 0.041309; 0.043469
8; 0.048994; 0.048382
16; 0.058702; 0.053615
32; 0.078252; 0.064010
128; 0.201699; 0.124749
256; 0.369521; 0.185146
512; 0.564670; 0.348160
1024; 1.027163; 0.679728
2048; 1.729515; 1.341678

1; 0.041004; 0.043297
8; 0.049061; 0.048342
16; 0.058724; 0.053526
32; 0.078417; 0.063791
128; 0.203420; 0.124755
256; 0.368674; 0.185280
512; 0.565533; 0.348282
1024; 0.974235; 0.680940
2048; 1.735542; 1.341912