Hello, I'll try to make this a short story and would love to get some feedback.
I bought an AX1200 a while ago in 2011 to power an i7 920 system with triple SLI GTX 580. I was not into overclocking but the computer was watercooled on everything and ran pretty well.
Moving forward in early 2012 I upgraded toward my current setup first with a i7 3930k and a rampage extreme iv motherboard and still using that same PSU. At pretty much the same time I request and RMA on the PSU based on a very annoying noise coming for it and this RMA was granted and I received a new PSU real quick.
Now here is the part I don't remember too well. When I got the Rampage IV, I was really getting even more into water cooling and overclocking. I was really disappointed to find out that even small change to my OC on my board would cause the system to crash right away (that was early 2012). I pretty much gave up on OC at the time because I thought my cpu was just bad and couldn't find enough time to play with the setting anymore. I never looked at the PSU since it could power my pc just fine at default setting and even with 3 GTX 580... I'm pretty sure I did this before the RMA so I think I can rule out the PSU directly. the other thing I tested was getting a new set of memory but with the same results.
One important detail here. When doing my RMA I didnt send back the old cables because it was all setup in my PC and didnt want to waste time. I was returning it for noise after all. The new PSU I got was super quite so problem solved. I sent back the old PSU with the new cables back to Corsair.
Fast forward to last week now. I get a GTX 980 install it and for some reason decide to try OC again. Same result I had before with the system crashing right away even with the safe presets at low OC. Then I noticed the voltage are pretty low.
12v is 11.904
5v is 4.040
3.3v is 3.120
For sure that cant be good right? So I start unplugging stuff to see if it make a difference and after a reboot it did infact increase a bit where I could get 12v 4.9v and 3.2v. Still not where I want them to be but better. Try to OC again but still no luck.
At that point I was pretty sure my PSU couldnt deliver enough to the CPU. I toke out my old HX750 and palce that in my system. First boot, go in the bios. Pick a crazy OC profile at 4.8ghz, save, restart and behold my system POST just fine and boot to Windows... Ran cpu burner for a couple hours and its ROCK stable.
I feel like a sucker for not checkign that before because I pretty much spent a ton of money on the setup and didnt OC it for 2 years.
The end.
Now, unless I get new PSU cables there is no way I can tell if its the PSU or the cables. Why would the system run fine at stock speed but just a small increase of voltage requirement on the CPU would make it fail. I have the 8pin and the 4pin 12v plugged in on top of that. Thats a lot of juice going to the CPU. It could even power 3 GTX 580 under heavy gaming loads! Sent a support ticket but they are asking me for my invoice so I guess im out of luck there since I dont have it anymore.
I bought an AX1200 a while ago in 2011 to power an i7 920 system with triple SLI GTX 580. I was not into overclocking but the computer was watercooled on everything and ran pretty well.
Moving forward in early 2012 I upgraded toward my current setup first with a i7 3930k and a rampage extreme iv motherboard and still using that same PSU. At pretty much the same time I request and RMA on the PSU based on a very annoying noise coming for it and this RMA was granted and I received a new PSU real quick.
Now here is the part I don't remember too well. When I got the Rampage IV, I was really getting even more into water cooling and overclocking. I was really disappointed to find out that even small change to my OC on my board would cause the system to crash right away (that was early 2012). I pretty much gave up on OC at the time because I thought my cpu was just bad and couldn't find enough time to play with the setting anymore. I never looked at the PSU since it could power my pc just fine at default setting and even with 3 GTX 580... I'm pretty sure I did this before the RMA so I think I can rule out the PSU directly. the other thing I tested was getting a new set of memory but with the same results.
One important detail here. When doing my RMA I didnt send back the old cables because it was all setup in my PC and didnt want to waste time. I was returning it for noise after all. The new PSU I got was super quite so problem solved. I sent back the old PSU with the new cables back to Corsair.
Fast forward to last week now. I get a GTX 980 install it and for some reason decide to try OC again. Same result I had before with the system crashing right away even with the safe presets at low OC. Then I noticed the voltage are pretty low.
12v is 11.904
5v is 4.040
3.3v is 3.120
For sure that cant be good right? So I start unplugging stuff to see if it make a difference and after a reboot it did infact increase a bit where I could get 12v 4.9v and 3.2v. Still not where I want them to be but better. Try to OC again but still no luck.
At that point I was pretty sure my PSU couldnt deliver enough to the CPU. I toke out my old HX750 and palce that in my system. First boot, go in the bios. Pick a crazy OC profile at 4.8ghz, save, restart and behold my system POST just fine and boot to Windows... Ran cpu burner for a couple hours and its ROCK stable.
I feel like a sucker for not checkign that before because I pretty much spent a ton of money on the setup and didnt OC it for 2 years.
The end.
Now, unless I get new PSU cables there is no way I can tell if its the PSU or the cables. Why would the system run fine at stock speed but just a small increase of voltage requirement on the CPU would make it fail. I have the 8pin and the 4pin 12v plugged in on top of that. Thats a lot of juice going to the CPU. It could even power 3 GTX 580 under heavy gaming loads! Sent a support ticket but they are asking me for my invoice so I guess im out of luck there since I dont have it anymore.
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