Interesting fact: after modification timings Gigabyte HD7950 gives stable ~330H/s with 1% rejected. (1190/1470) - Pic 1
If increase mem frequency up to 1500, GPU gives ~361 H/s. But about 15% of rejected. In log file appears strings of buffer overflow. - Pic 2
https://yadi.sk/i/SHGnaZM739jvERPic 1
https://yadi.sk/i/dRQtFiZW39jvLuPic 2
What does this buffer overflow mean ? Obviously, hashrate indexes is not very accurate ?
No it doesn't. There is no way that a 7950 gives you that higher hash rate than a 280x AND a 7970..