![[H]ard|Forum](/styles/hardforum/xenforo/logo_dark.png){kind=logo}
I have a 500 watt Antec Basiq PSU. It's spec sheet here http://www.newegg.com/Product/ShowI...siq BP500U 500W Continuous Power Power Supply
You can see it has two 12v rails at 18 amps each.
My system is pretty..almost low end these days. It's a Q6600@ 2.4 (not overclocked) 4GB DDR2, 500GB HDD, DVD drive, and a powercolor 4890 (which is factory overclocked to 950 mhz).
I started getting strange shutdowns while playing Crysis (the only PC game I've played on this rig btw). What would happen is the system would literally "snap" off in an instant, no error screens or anything like that, just black screen and then, the PC would reboot itself.
This happened a few times while playing over weeks, I just chalked it up to a bug, but on one recent session it happened several times, so bad that I had to stop playing.
I knew it was either overheating or PSU. It's almost certainly not CPU overheating using that real temp prog uncalibrated, my CPU temps where like 50C from thermal max. Even uncalibrated that rules out the CPU imo.
The GPU, well first I wondered if it was VRM overheating or core. Turns out theres no way for me to check my VRM's because it's a non-reference (I guess, it does have a red PCB though which I was told means it's reference, but the fan is def non ref) so all the programs wont even read my vrm temps which is shit. But the vrm's do seem to have a heatsink on them, so I'm pretty sure thats not it. Now on the core, it does get hot, running furmark the max I achieved was 89C. But it would get to 85+C under load every time. I also ran Crysis in a window so I could watch temps, and the GPU got to 85C, and that was in a 1280 window so I know it gets hotter in fullscreen 1680. But my idle temps are great, like 54C.
But trying to figure out if it was a temp issue was inconclusive, I couldnt really get the shutdowns to replicate consistently, even though it did shutdown sometimes in furmark too, other times it didn't.
So then I downloaded that OCCT program, and here's where I decided it was PSU..when I was running that prog it has a voltage graph (why it can read my system voltage but other progs seemingly cant I dunno), and if that graph is accurate, I believe it showed my 12v rail rapidly dropping to like 10.7 V when the stress test started. The computer actually didn't shutdown though ( I aborted test after a minute or two though).
So at that point I decided it must be the PSU, but whats bothering me is it seems that PSU really should be sufficient for a 4890. From what I read online. Whenever I google it, forum topics suggest a 500 watt supply is plenty for a 4890, people with bigger rigs than mine being told they use less than 400 watts, and so on. All the online power supply calculators say the same. The amps, as far as I can figure, should be enough to. So I dont get it. A new power supply is 100 bucks, so I dont want to buy one if thats not the problem. Any thoughts?
You can see it has two 12v rails at 18 amps each.
My system is pretty..almost low end these days. It's a Q6600@ 2.4 (not overclocked) 4GB DDR2, 500GB HDD, DVD drive, and a powercolor 4890 (which is factory overclocked to 950 mhz).
I started getting strange shutdowns while playing Crysis (the only PC game I've played on this rig btw). What would happen is the system would literally "snap" off in an instant, no error screens or anything like that, just black screen and then, the PC would reboot itself.
This happened a few times while playing over weeks, I just chalked it up to a bug, but on one recent session it happened several times, so bad that I had to stop playing.
I knew it was either overheating or PSU. It's almost certainly not CPU overheating using that real temp prog uncalibrated, my CPU temps where like 50C from thermal max. Even uncalibrated that rules out the CPU imo.
The GPU, well first I wondered if it was VRM overheating or core. Turns out theres no way for me to check my VRM's because it's a non-reference (I guess, it does have a red PCB though which I was told means it's reference, but the fan is def non ref) so all the programs wont even read my vrm temps which is shit. But the vrm's do seem to have a heatsink on them, so I'm pretty sure thats not it. Now on the core, it does get hot, running furmark the max I achieved was 89C. But it would get to 85+C under load every time. I also ran Crysis in a window so I could watch temps, and the GPU got to 85C, and that was in a 1280 window so I know it gets hotter in fullscreen 1680. But my idle temps are great, like 54C.
But trying to figure out if it was a temp issue was inconclusive, I couldnt really get the shutdowns to replicate consistently, even though it did shutdown sometimes in furmark too, other times it didn't.
So then I downloaded that OCCT program, and here's where I decided it was PSU..when I was running that prog it has a voltage graph (why it can read my system voltage but other progs seemingly cant I dunno), and if that graph is accurate, I believe it showed my 12v rail rapidly dropping to like 10.7 V when the stress test started. The computer actually didn't shutdown though ( I aborted test after a minute or two though).
So at that point I decided it must be the PSU, but whats bothering me is it seems that PSU really should be sufficient for a 4890. From what I read online. Whenever I google it, forum topics suggest a 500 watt supply is plenty for a 4890, people with bigger rigs than mine being told they use less than 400 watts, and so on. All the online power supply calculators say the same. The amps, as far as I can figure, should be enough to. So I dont get it. A new power supply is 100 bucks, so I dont want to buy one if thats not the problem. Any thoughts?
