PCI-Express Riser/Extender Test

Published: 7th Jul 2017, 08:48 GMT   Comments

This was the most time-consuming part of this review. In order to have valid results, we needed a lot of benchmarks runs. Each GPU score is an average of 5 runs. We tested two cards: MSI GTX 1080 TI GAMING X and MSI GTX 1050. The main difference between the two is how they are powered. The first card has external power connectors, while the other is only powered by PCIe slot. Each card had power limit and temperature limit set to the maximum value. The process was automated and we collected data from four benchmarks: 3DMark Fire Strike Performance, Extreme, Ultra and Superposition in 1080p Extreme preset. For GTX 1050 we replaced FireStrike Ultra to Sky Diver and Superposition was set to medium preset.

To keep the variance comparable for each benchmark we calculated the percentage of variance to the average score. This gave us easy to understand values. Basically, anything above 1% should be considered unstable.

MSI GTX 1080 Ti GAMING X (external power)
Extender3DMark FireStrike Performance3DMark FireStrike Extreme3DMark FireStrike UltraUnigine Superposition 1080p Extreme
AVERAGE SCORE
(higher is better)
PCIe Slot
 
 
29302
 
 
14421
 
 
7152
 
 
5821
Bitcoin USB
 
 
21251
 
 
11927
 
 
6376
 
 
5233
Cheap #1
 
 
29263
 
 
14425
 
 
7180
 
 
5808
Cheap #2 (1x)
 
 
26510
 
 
13687
 
 
6950
 
 
5641
Cheap #3
 
 
29208
 
 
14367
 
 
7166
 
 
5802
Cheap #4
 
 
28756
 
 
14060
 
 
7142
 
 
5721
TT Premium
 
 
29271
 
 
14412
 
 
7153
 
 
5800
Lian-Li 30cm
 
 
29218
 
 
14433
 
 
7182
 
 
5817
Lian-Li 38cm
 
 
29211
 
 
14399
 
 
7175
 
 
5811
TT Daisy
 
 
29276
 
 
14428
 
 
7176
 
 
5804
LL Daisy
 
 
29274
 
 
14413
 
 
7181
 
 
5804
TT+LI Daisy
 
 
29212
 
 
14329
 
 
7158
 
 
5785
VARIANCE / SCORE (%)
(lower is better)
PCIe Slot
 
0.23%
 
0.06%
 
0.15%
 
0.25%
Bitcoin USB
 
0.37%
 
0.59%
 
0.21%
 
0.49%
Cheap #1
 
0.17%
 
0.18%
 
0.21%
 
0.34%
Cheap #2 (1x)
 
0.16%
 
0.10%
 
0.34%
 
0.14%
Cheap #3
 
0.27%
 
0.53%
 
0.22%
 
0.386%
Cheap #4
 
1.35%
 
0.45%
 
0.18%
 
2.48%
TT Premium
 
0.16%
 
0.32%
 
0.16%
 
0.24%
Lian-Li 30cm
 
0.20%
 
0.22%
 
0.28%
 
0.21%
Lian-Li 38cm
 
0.05%
 
0.15%
 
0.33%
 
0.56%
TT Daisy
 
0.20%
 
0.12%
 
0.12%
 
0.36%
LL Daisy
 
0.37%
 
0.37%
 
0.37%
 
0.37%
TT+LI Daisy
 
0.02%
 
0.52%
 
0.14%
 
0.32%

 

MSI GTX 1050 (no external power)
Extender3DMark Sky Diver3DMark FireStrike Performance3DMark FireStrike ExtremeUnigine Superposition 1080p Medium
AVERAGE SCORE
(higher is better)
PCIe Slot
 
 
22925
 
 
7076
 
 
3319
 
 
4747
Bitcoin USB
 
 
20236
 
 
6294
 
 
3122
 
 
4496
Cheap #1
 
 
11722
 
 
4002
 
 
2115
 
 
2183
Cheap #2 (1x)
 
 
20699
 
 
6588
 
 
3074
 
 
4656
Cheap #3
 
 
12666
 
 
3231
 
 
2088
 
 
2956
Cheap #4
 
 
21728
 
 
6899
 
 
3271
 
 
3844
TT Premium
 
 
21834
 
 
6935
 
 
3292
 
 
4745
Lian-Li 30cm
 
 
21804
 
 
6931
 
 
3291
 
 
4759
Lian-Li 38cm
 
 
21803
 
 
6936
 
 
3284
 
 
4749
TT Daisy
 
 
21838
 
 
6933
 
 
3287
 
 
4727
LL Daisy
 
 
21822
 
 
6934
 
 
3280
 
 
4752
TT+LI Daisy
 
 
21543
 
 
6131
 
 
2966
 
 
4727
VARIANCE / SCORE (%)
(lower is better)
PCIe Slot
 
0.06%
 
0.17%
 
0.19%
 
0.04%
Bitcoin USB
 
1.81%
 
0.17%
 
0.22%
 
0.15%
Cheap #1
 
60.00%
 
45.35%
 
53.60%
 
47.40%
Cheap #2 (1x)
 
0.59%
 
0.33%
 
0.25%
 
0.10%
Cheap #3
 
63.42%
 
53.71%
 
47.76%
 
20.57%
Cheap #4
 
0.07%
 
0.11%
 
0.11%
 
40.19%
TT Premium
 
0.04%
 
0.18%
 
0.15%
 
0.09%
Lian-Li 30cm
 
0.21%
 
0.24%
 
0.18%
 
0.07%
Lian-Li 38cm
 
0.29%
 
0.13%
 
0.10%
 
0.09%
TT Daisy
 
0.03%
 
0.23%
 
0.27%
 
0.05%
LL Daisy
 
0.03%
 
0.07%
 
0.33%
 
0.16%
TT+LI Daisy
 
1.34%
 
15.24%
 
20.12%
 
0.48%

So as you can see, you are much likely to encouter unstable operation with a graphics card powered only by the PCIe slot.

 

Review Contents
Page 1Introduction to PCI Express risers
Page 2PCI Extender Extenders in this test
Page 3PCI Extender Synthetic Performance Test
Page 4PCI Extender Thermal Test
Page 5PCI Extender Conclusion




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