applied .98 to my jupiter, now hashing at 150GH/s instead of 500.
try enablecores.bin, someone was mentioning it helped in his case
if your miner runs smooth on v0.95, it *might* run with lower performance on 0.98 as some have reported
however your 500 are too low anyway,
check the file asic_test in /config, or install bertmod on a previous firmware version to figure out what's the issue (dead vram, bad cores, or else)