This is probably a better question in a different thread but...
Anyone with 7870's and/or the nice gigabyte 280x's please share your thread concurrency (tc) and intensity? I've been trying everything it seems, just wondering if anyone found magic.

For my Asus 7870's I'm using tc 2048 and I 11 or 12, getting about 120-130 khash which feels about 50 low.

For my gigabyte 280x (rev 2, the new black one) I'm trying all kinds of the recommended tc and keep getting hw errors. 8193, 4096 mucho hw errors and few accepts.
Any ideas?