Both models burned the discs successfully. The GO-0804A has a low PI error level (less than 15 errors around the entire disc, rising to 20-25 at the very end); the frequency of PO errors is rather high, but their level is low (3-4 with a minor increase at the end of the disc). That’s good, considering we deal with a rewritable medium. When reading the disc, the drive stumbled at the very end of the disc, dropping its speed a little.
The junior model has very good results, too. The PI level is about the same as with the GO-0804A, and the PO error level, especially at the end of the disc, is even lower. Reading of the written disc was performed without problems, too.
The GO-0804A performed burning at 4x speed without a hitch, but the junior model had some speed slumps in the middle of the disc. Anyway, the end results remained unaffected – the burn quality is excellent. The level of PI errors has even become lower than at 2x speed. Reading of the written disc went without problems, too.
So, the two drives from Gigabyte make a good job of burning DVD+RW media at both speeds (2x and 4x) – some DVD-burners even produce write-once discs of a worse quality. The competing format comes next.
Both drives handle this type of media well. As for the quality, the GO-0804A, like with the +RW format, produced an excellent disc with a low PI/PO error count. The level of PI errors is higher with the GO-0404A model, but is still far from the acceptable maximum. A minor surge of PO errors can be noticed at the end of the disc. So, we have good results in both cases, as the read graphs confirm, but the GO-0804A is somewhat better in this test anyway.
Summing up the rewritables section of the review, I want to say that the GO-0804A excellently works with media of both competing standards, while the GO-0404A writes DVD+RW discs better than DVD-RW ones (well, the resulting disc is anyway good in the latter case).