Burned at 4x when 6x was selected

[flash]

Used Image burn today, chose 6x but only burnt at 4x

I 12:23:53 ImgBurn Version 2.0.0.0 started!
I 12:23:53 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 2)
I 12:23:53 Initialising SPTI...
I 12:23:53 Searching for SCSI / ATAPI devices...
I 12:23:53 Found 1 DVD-ROM and 1 DVD±RW!
I 12:24:05 Operation Started!
I 12:24:05 Source File: C:\DVDVolume.MDS
I 12:24:05 Source File Sectors: 1,998,528 (MODE1/2048)
I 12:24:05 Source File Size: 4,092,985,344 bytes
I 12:24:05 Source File Volume Identifier: DVDVolume
I 12:24:05 Source File Application Identifier: SONIC SOLUTIONS IMAGESCRIPT (17984)
I 12:24:05 Source File Implementation Identifier: DVD Producer 1.0
I 12:24:05 Source File File System(s): ISO9660, UDF (1.02)
I 12:24:05 Destination Device: [1:0:0] PIONEER DVD-RW DVR-108 1.20 (F:) (ATA)
I 12:24:05 Destination Media Type: DVD-R (Disc ID: RITEKG05) (Speeds: 4x, 6x, 8x, 12x)
I 12:24:05 Destination Media Sectors: 2,297,888
I 12:24:05 Write Mode: DVD
I 12:24:05 Write Type: DAO
I 12:24:05 Write Speed: 6x
I 12:24:05 Link Size: Auto
I 12:24:05 Test Mode: No
I 12:24:05 BURN-Proof: Enabled
I 12:24:05 Filling Buffer...
I 12:24:09 Writing LeadIn...
I 12:25:15 Writing Image...
I 12:37:33 Synchronising Cache...
I 12:38:07 Image MD5: fbe84971457e6a555fc24e4b9e68e172
I 12:38:08 Operation Successfully Completed! - Duration: 00:14:02
I 12:38:08 Average Write Rate: 5,416 KB/s (3.9x) - Maximum Write Rate: 5,592 KB/s (4.0x)

[unskinnyboy]

Maybe this (http://forum.imgburn.com/index.php?showtopic=59&st=0&p=967&#entry967) will help. Even if it doesn't, asking in the ImgBurn forums would get you a quicker answer.

[LIGHTNING UK!]

Does 8x burn at 8x or does it burn at 6x ?

[blutach]

Plus those Ritek G05s are known to be highly problematic. Perhaps this is your burner's way of slowing things down on poor media.

Regards