Need help, PC freezes/locksup after 24hours of mining!

[mrbashfo]

Hello all I need your help!

My rig locksup and freezes everyday at the same time roughly

4x 5770s
Antec 750watt psu
680i motherboard
pentium d processor

I need to stablize this machine! Any help and suggestions will be highly appreciated.
all of them are at

910mhz core
600 mem
80% fan

GUI Miner
-v -w128

[1715360029]

1715360029

[DeathAndTaxes]

What OS?

What time of day?

What temp when it locks up?

If it is locking up at the hottest part of day then that is pretty easy to explain.  If it is locking up at midnight well that might be something totally different.

[mrbashfo]

locks up at 6-7pm when it is cooling down. Temps are always pretty much the same roughly 80c

[Niann]

Check other pc Temps, memory, cpu etc.

Also check all coolers and fans.

[Dargo]

Have you tried lowering the core clocks a bit? GPU stability isn't an all or nothing affair. I know there are core clocks for my cards where they will seem fine for hours but still lock up once or twice a day.

[jjiimm_64]

Hello all I need your help!

My rig locksup and freezes everyday at the same time roughly

4x 5770s
Antec 750watt psu
680i motherboard
pentium d processor

I need to stablize this machine! Any help and suggestions will be highly appreciated.
all of them are at

910mhz core
600 mem
80% fan

GUI Miner
-v -w128

same time... that is a big clue.

windows update?  screen saver? some other daily program..  my other thought is   4 cards on a 750?  down clock and get em stable

[vapourminer]

same time... that is a big clue.

yup. anything in the house that kicks in about that time?