mining with 5970, gpu usage spiking

[hickc]

I am mining with a hd 5970, catalyst 11.12, sdk 2.1 and phoenix 1.7.5 on win 7 64 bit. Generally my gpu usage for both gpus is maxed out at 99%, but occasionally it will drop to 75% or something for a moment and then bounce back up. core clock is 850mhz, mem is 310 mhz, my psu is kingwin lazer 550w platinum (I know its not psu related, because even with a 750w antec bronze psu these flareups still happened). The temps are fine at about 50C for both gpus, so I was wondering does anyone know why this happens, what it means and how to fix it?

thanks for the help.

[Gator-hex]

It's probably just waiting for the pool to send it some work.

[xorxor]

3 possibilities:


1 pool to slow , what pool are you using?

2 some activity in the desktop i are you mining dedicated? all other progs disabled or minimized?

3 shitty riser or not plugged corectly

and additionaly, its a sha256 or scrypt?

[crazyates]

phoenix 1.7.5

Try using CGMiner. You won't be disappointed.

[hickc]

my pool is 50btc, i am located in the us.

it is a dedicated miner with no background tasks

how do i tell if it is sha256 or scrypt?

everything is plugged in correctly

[crashoveride54902]

my pool is 50btc, i am located in the us.

it is a dedicated miner with no background tasks

how do i tell if it is sha256 or scrypt?

everything is plugged in correctly

pretty sure he meant btc or ltc? but i'm guessing btc...and it's probably just a pool spike...i mine on slush and notice sometimes my gpu useage drops down and then back up...no biggie as long as it doesn't stay down...

[Tesla71]

I am having this issues too, here with LTC-mining but on different pools.
Seems for me like a temporary network problem on pool or local site, especially with one miner which is behind a proxy.

[ddo]

I have a similar issue. When starting to mine both my GPUs run around 95% or higher, but after like 10 minutes my first GPU starts running at around 75% while my second is still around 94%. It basically stays like this after... Does this mean one of my GPUs are broken?

[ssateneth]

turn off crossfire, or use same clocks on each 5970 core.