Is this a 4x media?

I bought the RIDATA 4X DVD+R media from amazon but I can burn it only in 2.4x.
I used DVDInfoPro to know more about the media and here’s the result:

Media Information
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID RITEK R03
Format Type UDF 1.02
Volume Name
Application id
Implementation id roxio EasyCDCreator
Recording Date/Time (mm/dd/yyyy) 6/19/2004 5:55:35
Format Capacity 4.37GB(4.70GB)
Book Type DVD+R
Media Type DVD+R
Default DVD+RW book type DVD-RW
Default DVD+R book type DVD-ROM
Media Id Code Speed 8.0x 11080KBps
Available Write Descriptor CLV 2.4x 3324KBps
Data area starting sector 30000h
Data area end sector 22FF1Fh
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

Is this really a 4X media?
Is there a way to make my NEC 1300A to burn it using 4x ??

Thanks.