Tonga is based on GCN 1.1 architecture, it has increased primitive rate and larger L2 cache. Tonga has TrueAudio and XDMA CrossFire support.
Oland : GCN 1.0, 6 CU, 1 triangle per cycle, 8 ROP, L2 256 KB, 128 bits Cape Verde : GCN 1.0, 10 CU, 1 triangle per cycle, 16 ROP, L2 512 KB, 128 bits Bonaire : GCN 1.1, 14 CU, 2 triangles per cycle, 16 ROP, L2 512 KB, 128 bits Pitcairn : GCN 1.0, 20 CU, 2 triangles per cycle, 32 ROP, L2 512 KB, 256 bits Tonga : GCN 1.1, 28 or 32 CU, 4 triangles per cycle, 32 ROP, L2 512 or 1024 KB, 256 bits Tahiti : GCN 1.0, 32 CU, 2 triangles per cycle, 32 ROP, L2 768 KB, 384 bits Hawaii : GCN 1.1, 44 CU, 4 triangles per cycle, 64 ROP, L2 1024 KB, 512 bits
Source: VideoCardz