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Delkin Dual Slot SD/CF Card Reader Review DDREADER-44

Delkin Devices USB 3.0 Dual Slot Card Reader for CF and SD Cards


The Delkin Dual-Slot Card Reader DDREADER-44 features Secure Digital and CompactFlash card slots. It supports CF cards up to UDMA 7 and SD, SDHC and SDXC cards including UHS-I and UHS-II.

The Dual-Slot reader has a plastic case with matte black finish. The card slots are glossy red plastic. A hinged rubber door on the front of the reader covers the card slots. A blue LED on the top of the reader turns on when the reader is plugged in a USB port. The light blinks when a card is being accessed. The reader measures about 2 5/8 by 2 1/4 by 3/4 inches not including the USB cable.

Delkin Devices USB 3.0 Dual Slot Card Reader with SD and CF cards

The SD card slot operates smoothly as the card aligns itself and seats snugly in the reader. Inserting a CompactFlash card is somewhat more difficult. The alignment tracks do not begin until about 5/8 inch into the reader and the card can move up and down and side to side before it reaches the tracks Once the card is aligned properly on the tracks it there is little play and the card seats firmly onto the connection pins. Both SD and CF cards insert fully into the reader and the rubber door can be closed with the cards present. The cards are just far apart enough to be able to remove one with both cards in the reader, although fingernails help tremendously.

Delkin Devices USB 3.0 Dual Slot Card Reader Bottom

Rubber feet on the bottom of the reader help to hold it in place on a desk or table. The USB cable is permanently attached and measures about 36 inches in length. The label on the bottom reader indicates it is made in Taiwan.

Delkin Devices USB 3.0 Dual Slot Card Reader Package


The read and write performance of Secure Digital cards is included below. CompactFlash card performance was inconsistent. Several UDMA 7 cards could not sustain full speed during read operations. Delkin confirmed there is a firmware issue with the reader which is being addressed.

Reader: Delkin Dual Slot SD UHS-II and CF Card Reader
Benchmark: CrystalDiskMark 3.0.3 x64
Program settings: 1000 MB, 5 passes, random test data
Operating system: Windows 10 Pro
Motherboard: Gigabyte GA-Z77X-UD3H
Processor: Intel Core i7-3770K @ 4.40GHz
RAM: 32GB DDR3 1600

Delkin Dual Slot SD UHS-II and CF Card Reader
Card Benchmarks
Toshiba Exceria Pro UHS-II 32GBSD256.250222.203
Toshiba Exceria Pro N502 64GBSD253.770230.304
Hoodman Steel UHS-II 64GBSD253.310178.223
Lexar Professional 2000x UHS-II Rev E 64GBSD252.031232.217
Lexar Professional 2000x UHS-II Rev E 32GBSD250.825234.162
Sony M Series UHS-II 128GBSD249.15793.707
Angelbird AV Pro V90 64GBSD247.949228.897
SanDisk Extreme Pro 300MB/s UHS-II 128GBSD247.832206.474
Lexar Professional 1800x microSD UHS-II 64GBmicroSD247.627208.589
ProGrade 250MB/s UHS-II V90 64GBSD247.306227.877
Lexar Professional 2000x UHS-II 64GBSD247.247230.964
Sony M Series UHS-II 32GBSD246.869114.075
Adata Premier One UHS-II V90 64GBSD246.724227.778
Transcend 700S UHS-II V90 64GBSD246.029199.653
Lexar Professional 2000x UHS-II 32GBSD246.000232.629
Lexar Professional 1800x microSD UHS-II 32GBmicroSD245.770207.290
Delkin 1900x UHS-II 32GBSD244.73751.108
Sony SF-G 300MB/s UHS-II 32GBSD244.709220.544
Transcend Ultimate UHS-II U3 32GBSD244.651178.314
Lexar Professional 1800x microSD UHS-II 128GBmicroSD244.623106.552
Transcend Ultimate UHS-II U3 64GBSD244.566178.102
Sony M Series UHS-II 64GBSD243.96899.241
Delkin Power 2000x UHS-II V90 64GBSD243.940203.232
Delkin Power UHS-II V90 128GBSD243.855200.819
AData Premier One UHS-II V90 256GBSD243.798215.358
Integral UltimaPro X2 UHS-II V90 64GBSD243.713220.590
SanDisk Extreme Pro 300MB/s UHS-II 64GBSD243.430202.526
Sony Tough UHS-II 64GBSD243.148222.935
SanDisk Extreme Pro UHS-II 275MB/s microSDXC 64GBmicroSD242.586105.332
Sony SF-G 300MB/s UHS-II 128GBSD241.858220.869
Sony SF-G 300MB/s UHS-II 64GBSD241.468221.125
SanDisk Extreme Pro 300MB/s UHS-II 32GBSD239.921206.922
Verbatim Pro II Plus UHS-II V90 64GBSD239.784210.494
SanDisk Extreme Pro 280MB/s UHS-II 32GBSD239.702198.237
Panasonic MicroP2 UHS-II 32GBSD239.62049.731
Delkin Prime UHS-II V60 64GBSD239.34694.017
Lexar Professional 2000x UHS-II Rev B 128GBSD235.768206.129
ProGrade 200MB/s UHS-II V60 64GBSD166.151107.063
Lexar Professional 1000x UHS-II Rev C 64GBSD165.966110.679
Angelbird AV Pro V60 64GBSD165.130109.432
Lexar Professional 1000x UHS-II 256GBSD155.99292.475
Lexar Professional 1000x UHS-II Rev C 128GBSD154.90988.257
Lexar Professional 1000x UHS-II 32GBSD153.70587.549
Lexar Professional 1000x UHS-II Rev B 32GBSD153.54884.823
Lexar Professional 1000x UHS-II 64GBSD152.72083.886
Lexar Professional 1000x microSD UHS-II 32GBmicroSD151.96852.301
Lexar Professional 1000x UHS-II 128GBSD151.85786.295
Lexar Professional 1000x UHS-II microSD 64GBmicroSD150.76653.548
Lexar Professional 1000x UHS-II microSD 128GBmicroSD145.55558.469
AgfaPhoto Professional 64GBSD98.14592.296
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 64GBmicroSD98.03491.555
SanDisk Ultra Plus V10 A1 microSDXC 128GBmicroSD98.01662.282
Patriot EP Series V30 A1 microSDXC 128GBmicroSD97.97082.286
Kingston Canvas React V30 256GBSD97.97081.722
SanDisk Extreme Pro 95MB/s U3 V30 128GBSD97.96191.204
SanDisk Extreme Pro 95MB/s 64GBSD97.95291.988
SanDisk Extreme 90MB/s U3 V30 microSDXC 64GBmicroSD97.94370.683
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDHC 32GBmicroSD97.89791.204
Kingston Canvas Go! V30 256GBSD97.88881.367
SanDisk Extreme 90MB/s U3 V30 32GBSD97.87953.252
SanDisk Extreme 100MB/s A1 microSDXC 128GBmicroSD97.87063.782
SanDisk Extreme Plus 80MB/s 32GBSD97.84260.218
SanDisk Extreme Plus 100MB/s A1 microSDXC 128GBmicroSD97.83390.574
SanDisk Extreme 90MB/s U3 V30 128GBSD97.83366.441
Kingston Canvas React V30 64GBSD97.82482.448
SanDisk Extreme Plus 80MB/s microSD 32GBmicroSD97.82465.186
Kingston Canvas React V30 128GBSD97.82482.468
SanDisk Extreme 100MB/s A1 microSDXC 64GBmicroSD97.82471.317
SanDisk Extreme Plus 100MB/s A1 microSDHC 32GBmicroSD97.81590.621
SanDisk Extreme Pro 95MB/s 32GBSD97.79789.937
SanDisk Extreme 100MB/s A1 microSDHC 32GBmicroSD97.78871.747
SanDisk Extreme Plus 95/90 MB/s U3 V30 microSDXC 128GBmicroSD97.78889.622
SanDisk Extreme 90MB/s U3 V30 microSDHC 32GBmicroSD97.76969.877
SanDisk Extreme Pro 95MB/s microSDXC 64GBmicroSD97.76091.555
SanDisk Extreme 90MB/s U3 V30 microSDXC 128GBmicroSD97.75163.720
SanDisk Extreme Pro 170MB/s 128GBSD97.75188.353
SanDisk Extreme Plus 90MB/s U3 V30 64GBSD97.74265.409
SanDisk Extreme 90MB/s U3 V30 256GBSD97.74264.911
SanDisk Extreme Pro 95MB/s 128GBSD97.74291.355
SanDisk Extreme Pro 95MB/s microSDHC 32GBmicroSD97.73391.499
SanDisk Extreme 90MB/s U3 V30 64GBSD97.72454.165
SanDisk Extreme Pro 95MB/s U3 V30 32GBSD97.70690.999
SanDisk Extreme Plus 90MB/s U3 V30 32GBSD97.70666.614
SanDisk Extreme 150MB 256GBSD97.69688.840
SanDisk Extreme 90MB/s U3 64GBSD97.65149.707
SanDisk Extreme Plus 80MB/s 64GBSD97.63360.639
SanDisk Extreme 90MB/s U3 32GBSD97.57849.489
SanDisk Extreme V30 A2 microSDXC 400GBmicroSD97.56987.901
SanDisk Extreme Pro 95MB/s U3 V30 64GBSD97.56990.169
SanDisk Extreme Pro 95MB/s U3 V30 256GBSD97.52490.146
Panasonic Gold 95/90 64GBSD97.49788.279
SanDisk Extreme Pro 170MB/s 256GBSD97.47888.286
SanDisk Extreme 90MB/s microSDHC 32GBmicroSD97.46948.337
SanDisk Extreme Plus 100MB/s A1 microSDXC 64GBmicroSD97.37990.262
Samsung PRO Select microSDXC 64GBmicroSD97.35287.946
Kingston U3 90/80 MB/s 256GBSD97.31687.418
SanDisk Extreme 150MB/s 128GBSD97.29888.049
SanDisk Extreme Pro 95MB/s U3 32GBSD97.23491.212
SanDisk Ultra 80MB/s microSD 128GBmicroSD97.19855.616
SanDisk Extreme V30 A2 microSDXC 256GBmicroSD97.17188.323
SanDisk Extreme 150MB/s 64GBSD97.14466.429
SanDisk Extreme Plus V30 A2 microSDXC 128GBmicroSD97.12687.483
SanDisk Extreme Pro 170MB/s 64GBSD97.10887.725
SanDisk Extreme Plus 95/90 MB/s microSD 64GBmicroSD97.10890.983
SanDisk Extreme Plus 95/90 MB/s microSD 32GBmicroSD97.09990.943
SanDisk Extreme Plus 150MB/s 128GBSD97.08187.586
SanDisk Extreme Plus 150MB/s 64GBSD97.04587.762
SanDisk Extreme Pro 95MB/s 256GBSD96.97490.371
Kingston U3 90/80 MB/s 32GBSD96.91190.092
Kingston U3 90/80 MB/s 128GBSD96.90283.432
SanDisk Ultra 80MB/s microSD 64GBmicroSD96.89320.059
Kingston Class 10 UHS-I 64GBSD96.83979.758
Polaroid Extreme Performance 95/90 MB/s 64GBSD96.80481.843
SanDisk Extreme Plus 90MB/s 32GBSD96.79572.476
Sony Ultra-High Durability Professional 64GBSD96.79576.282
Kingston U3 90/80 MB/s 64GBSD96.78688.592
Verbatim Pro Plus V30 64GBSD96.74183.392
Kingston Canvas Go! V30 64GBSD96.67981.392
Kingston U3 (90/80) microSD 64GBmicroSD96.55483.572
PNY Pro Elite microSDXC 64GBmicroSD96.48387.454
Toshiba Exceria UHS-I Class 3 32GBSD96.45661.852
Toshiba Exceria Pro N401 95/75 MB/s 128GBSD96.35075.388
Toshiba Exceria Pro N401 95/75 MB/s 128GBSD96.34176.011
Samsung EVO Select microSDXC 256GBmicroSD96.33287.600
Toshiba Exceria Type 1 32GBSD96.32387.192
Samsung PRO Plus 32GBSD96.27987.287
Toshiba Exceria UHS-I Class 3 64GBSD96.27060.713
Patriot EP Series microSDXC 64GBmicroSD96.24482.358
Toshiba Exceria Type 2 32GBSD96.24465.279
Samsung PRO Plus 64GBSD96.08588.286
Delkin Black 32GBSD95.99781.869
Samsung PRO Plus microSDXC 64GBmicroSD95.97987.740
Samsung PRO U3 32GBSD95.89279.096
Delkin Elite 633x 32GBSD95.89282.074
PNY Pro Elite 64GBSD95.89286.431
Samsung PRO microSDXC 64GBmicroSD95.80478.480
Samsung PRO U3 64GBSD95.67378.675
Samsung PRO Select microSDXC 64GBmicroSD95.65687.012
Lexar Professional 633x U3 256GBSD95.50768.886
Patriot EP Pro 90MB/s 32GBSD95.47347.410
Sony 95MB/s U3 64GBSD95.45588.079
Samsung EVO Select microSDXC 64GBmicroSD95.29025.552
PNY Elite Performance U1 64GBSD95.24765.495
Transcend 633x microSDHC 32GBmicroSD95.20488.108
Transcend R95 W85 U3 64GBSD95.17887.367
Transcend 95/60 MB/s U3 256GBSD95.17868.750
Transcend 95/60 MB/s U3 64GBSD95.16167.372
Transcend 600x 128GBSD95.15269.346
PNY Elite Performance U3 128GBSD95.14368.611
PNY Elite Performance U1 32GBSD95.10038.419
Lexar Professional 600x 64GBSD95.10066.810
Sony 95MB/s U3 32GBSD95.10087.938
Gobe Magic 104MB/s 64GBSD95.08388.079
Transcend 600x 64GBSD95.06665.932
Transcend 500S V30 64GBSD95.05768.329
Sony 94MB/s 32GBSD95.02365.754
Transcend 95/85 MB/s U3 32GBSD95.00688.615
Gobe Magic 104MB/s 32GBSD94.98882.067
Lexar Professional 633x U3 64GBSD94.96357.652
PNY Elite Performance U3 64GBSD94.96368.530
Transcend 95/60 MB/s U3 128GBSD94.95467.742
Transcend 600x 32GBSD94.95439.283
PNY Turbo Performance U3 microSD 32GBmicroSD94.94556.342
Lexar Professional 633x U3 32GBSD94.94548.680
PNY Turbo Performance microSDXC 64GBmicroSD94.92859.208
Transcend 500S V30 128GBSD94.92868.579
Patriot EP Pro 90MB/s 64GBSD94.85942.235
PNY Elite Performance U3 256GBSD94.84255.651
Panasonic Gold Series 32GBSD94.83443.385
Lexar Professional 633x U1 64GBSD94.79129.486
Silicon Power Superior Pro 128GBSD94.78266.412
Lexar Professional 633x U1 128GBSD94.77429.005
Transcend 500S 64GB Card 2SD94.76567.755
PNY Elite-X microSDHC 32GBmicroSD94.75776.271
Samsung PRO 64GBSD94.70583.036
Lexar Professional 600x 32GBSD94.68848.919
Kingston Ultimate 32GBSD94.63747.254
Patriot EP Pro 128GBSD94.59439.966
Samsung PRO 32GBSD94.56081.411
Lexar Professional 633x U1 32GBSD94.56022.233
SanDisk Extreme Plus 90MB/s 64GBSD94.53471.983
PNY Elite-X microSDXC 64GBmicroSD94.52674.078
Samsung PRO Plus microSDXC 128GBmicroSD94.47540.896
Transcend Ultimate 633x microSD 64GBmicroSD94.47586.968
Kingston Canvas Select 64GBSD93.53923.707
Lexar Professional 633x U3 128GBSD93.14168.356
Samsung PRO Select microSDXC 128GBmicroSD93.14184.270
Samsung PRO Plus microSDXC 128GBmicroSD92.85283.973
Toshiba FlashAir W-04 64GBSD92.57375.797
SanDisk Extreme 90MB/s microSDXC 64GBmicroSD92.54943.729
SanDisk Ultra 90MB/s microSD 200GBmicroSD90.66820.566
Lexar Professional 633x microSDXC 200GBmicroSD90.59836.853
Kingston Class 10 256GBSD89.33245.547
SanDisk Extreme 90MB/s U3 128GBSD85.38978.433
SanDisk Extreme 80MB/s 128GBSD85.02979.770
Lexar Professional 633x microSDXC 128GBmicroSD84.46020.699
SanDisk Extreme 80MB/s 256GBSD82.81979.060
SanDisk Ultra 80MB/s microSD 32GBmicroSD82.53917.918
Samsung EVO Plus 128GB microSDXCmicroSD81.29822.814
Samsung EVO Select microSDXC 128GBmicroSD80.00722.743
SanDisk Extreme 60MB/s 32GBSD75.42654.925
SanDisk Extreme U3 microSD 32GBmicroSD74.75454.025
Lexar Professional 400x 32GBSD71.33743.326
SanDisk Extreme 60MB/s 64GBSD71.24952.479
SanDisk Extreme U3 microSD 64GBmicroSD69.21355.565
Patriot EP PRO microSDXC 64GBmicroSD55.48651.350
Lexar Professional 633x microSDXC 64GBmicroSD55.36628.088
PNY Elite microSDXC 64GBmicroSD55.36332.295
PNY Elite microSDXC 128GBmicroSD55.28125.008
SanDisk Ultra microSD 32GBmicroSD47.61314.635
Samsung EVO microSD 32GBmicroSD47.60624.432
SanDisk Ultra microSD 64GBmicroSD47.60015.769
SanDisk Ultra 40MB/s 64GBSD47.59316.194
SanDisk Extreme 45MB/s 32GBSD47.58544.628
Samsung EVO 64GBSD47.51123.662
Samsung EVO microSDXC 64GBmicroSD47.37823.526
SanDisk Ultra 40MB/s 32GB Card 2SD47.24620.003
Samsung EVO 32GBSD47.14420.068
Toshiba NFC 16GBSD37.83313.057
Toshiba FlashAir II 32GBSD19.09813.038

Compatible operating systems include Windows XP, Vista, 7 and 8. Max OS 9.0 or later. The Delkin Dual-Slot Reader has a five-year warranty.

Compare prices on the Delkin Dual Slot SD UHS-II and CF Card Reader reader. The lowest prices are highlighted in the table below.

Card ReaderConnectionModel NumberPrices
AmazonB&H PhotoAdorama
Delkin Dual Slot SD UHS-II and CF Card ReaderUSB 3.0DDREADER-44$28.19Check price$22.95