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XQD Memory Cards

XQD

XQD Card
 

XQD was a new memory card form factor introduced in 2010 by SanDisk, Sony and Nikon. Since it is based on the fast PCI Express interface, it clearly stood out from all other memory cards developed before, so it was immediately picked up by the CompactFlash Association for development. Essentially, XQD replaces both CompactFlash and CFast as the new form factor. With its 38.5 (W) x 29.8 (L) x 3.8mm (H) dimensions, it is physically smaller than CompactFlash / CFast cards and it has a much superior build than both SD and CF cards, since the cards are denser than SD and they no longer utilize pins on the host that could easily break or bend. Among camera manufacturers Nikon was the first to standardize on XQD cards with its Nikon D4, D4S, D5, D850, D500, Z7 and Z6 cameras using single or dual XQD memory slots. Although the first N-Series XQD cards were limited to 125 MB/sec read and 80 MB/sec write speeds, the last generation G-Series XQD cards have been able to reach much faster 440 MB/sec read and 400 MB/sec write speeds. With the XQD version 2.0 standard, the maximum theoretical throughput of XQD cards was pushed up to 1 GB/sec, although no such cards exist today. Similar to CFast, XQD has also seen a very slow adoption rate.

 

How many pictures can my memory device hold?
 

The following assumptions were made to calculate the number of images per card:
MP = 1,000,000 pixels
1MB = 1,000,000 bytes, 1GB = 1,000MB
TIFF image has 24 bit color depth, one of 16,777,216 colors per pixel
JPEG 100% Quality = Visually lossless JPEG compression with 1:10 ratio of RAW image

 

Photos - Compressed (JPEG 100% quality) Images per card.

NOTE: JPEG is the most common file format for consumer cameras.

Megapixels

File size (MB)

1GB

2GB

4GB

8GB

16GB

32GB

64GB

128GB

4MP

1.2

715

1430

2861

5722

11444

22888

45776

91552

5MP

1.5

572

1144

2288

4577

9155

18310

36620

73240

6MP

1.8

476

953

1907

3814

7629

15258

30516

61032

7MP

2.1

408

817

1634

3269

6539

13078

26156

52312

8MP

2.4

357

715

1430

2861

5722

11444

22888

45776

10MP

3.0

286

572

1144

2288

4577

9155

18310

36620

12MP

3.6

238

476

953

1907

3814

7629

15258

30516

14MP

4.2

204

408

817

1634

3269

6539

13078

26156

16MP

4.8

178

357

715

1430

2861

5722

11444

22888

22MP

6.6

130

260

520

1040

2080

4161

8322

16644


Photos - Uncompressed RAW (24 bits per pixel) Images per card

Megapixels

File size (MB)

1GB

2GB

4GB

8GB

16GB

32GB

64GB

128GB

4MP

12.0

71

143

286

572

1144

2288

4576

9152

5MP

15.0

57

114

228

457

915

1831

3662

7324

6MP

18.0

47

95

190

381

762

1525

3050

6100

7MP

21.0

40

81

163

326

653

1307

2614

5228

8MP

24.0

35

71

143

286

572

1144

2288

4576

10MP

30.0

28

57

114

228

457

915

1830

3660

12MP

36.0

23

47

95

190

381

762

1524

3048

14MP

42.0

20

40

81

163

326

653

1306

2612

16MP

48.0

17

35

71

143

286

572

1144

2288

22MP

66.0

13

26

52

104

208

416

832

1664