Thx for the suggestions!
Btw. my Ritek are R03 Rev.2.
I flashed BSGB as CVT and then again to BSMB.
Afterwards I set Solidburn on and put a fresh Ritek R03 disc in. So the first 2 discs I wrote burned 8x succesfully, but then the third disc only burned 4x. And the end of the third disc is very bad.
Sometimes, CDSpeed starts scanning at 1,78x instead of 3,??x. Eject and reload the disc fixes this.
In the attachements there are the Scans of the 3 discs in burned order.
Here is the ImgBurn Log of the first disc:
I 08:44:29 Operation Started!
I 08:44:29 Source File: Z:\_DVD IMAGES\BlaBla.ISO
I 08:44:29 Source File Sectors: 2.294.056 (MODE1/2048)
I 08:44:29 Source File Size: 4.698.226.688 bytes
I 08:44:29 Source File Implementation Identifier: BlaBla
I 08:44:29 Destination Device: [0:0:0] BENQ DVD DD DW1640 BSMB (G:) (ATA)
I 08:44:29 Destination Media Type: DVD+R (Disc ID: RITEK-R03-02) (Speeds: 2.4x; 4x; 8x)
I 08:44:29 Destination Media Sectors: 2.295.104
I 08:44:29 Write Mode: DVD
I 08:44:29 Write Type: DAO
I 08:44:29 Write Speed: MAX
I 08:44:29 Link Size: Auto
I 08:44:29 Test Mode: No
I 08:44:29 BURN-Proof: Enabled
I 08:44:29 Filling Buffer...
I 08:44:30 Writing LeadIn...
I 08:45:05 Writing Image...
I 08:59:38 Synchronising Cache...
I 08:59:39 Closing Track...
I 08:59:44 Finalising Disc...
I 09:00:08 Operation Successfully Completed! - Duration: 00:15:38
I 09:00:08 Average Write Rate: 5.261 KB/s (3.8x) - Maximum Write Rate: 5.606 KB/s (4.0x)
I 09:00:08 Cycling Tray before Verify...
I 09:00:23 Operation Started!
I 09:00:23 Source Device: [0:0:0] BENQ DVD DD DW1640 BSMB (G:) (ATA)
I 09:00:23 Source Media Type: DVD+R (Disc ID: RITEK-R03-02) (Speeds: 2.4x; 4x; 8x)
I 09:00:23 Verifying Sectors...
I 09:05:35 Operation Successfully Completed! - Duration: 00:05:11
I 09:05:35 Average Verify Rate: 14.752 KB/s (10.7x) - Maximum Verify Rate: 21.939 KB/s (15.8x)
I have done one burn on a Verbatim 16x (MCC004) which turned out very good, but the Riteks came also out 2 times good.
As for the +RWs I will do a full erease of all my old +RWs. Hope this helps.