Parkzone Corsair

I have a ZM750-HP and it is driving me apeshit, I have had so many of the same problems you had. I am not going to by a Zalman PSU ever again.

Are you certain this noise is not produced from the regulators on your graphics card? If this was produced by fluctuations in current through the PSU it would be going off with CPU activity, not just graphical output. Typically, this noise is produced by graphics cards, some are worse than others. The noise generated by my PC with the same PSU is completely different with whichever graphics card I use, yet the same with a different Power Supply. Zoom in on your GPU instead!

that’s cuz of high framerates!! higher the fps higher the squeal! and it’s not a problem… I tought that that high pitched squeal came from graphic card lol…

@21boxhead: Negatory on the fan. I stopped the fan with my finger and it was still screeching like a banshee. For whatever odd reason, the sound is drastically diminished with vsync on (forcing frame rate to monitor refresh). The noise is worse when frames are really high, like 999+ in menus and stuff. I wonder if it’s the intel chipset I have. . .I saw it reported on X58, X3# and X4#s, but not on any nvidia chipset MBs.

@drewer757 its most likely your fan

could also be a bad bearing on the fan

did you check your fan hitting something

same thing from my zalman 850watt psu, it seems to get louder and higher frequency as the framerate gets higher, likes to do it during loading screens in 3dmark, and begining of some games with bink video’s that show up on fraps as thousands of frames per second, and turning on crysis in thoes intro binks.. anyone find a way to make it stop yet?

If it is coming from your video card then your problem is a little different than mine, though I suspect it is because of the same reason…. low quality component or bad quality control. The only fix for you would be to get a different video card, or make sure you always have vsync on. I suspect putting vsync on would make a big difference, just as it does with mine.

I have the fucking same problem, with some games..

I dont have it with GTA IV but I do have it with other games like Far Cry 2, Test Drive Unlimited but The Sims 3 was the worst ever. My vidcard started trippin making lots of noise and the fan speed was set to 100 so It wouldn’t crash/overheat.

And It’s definitely my videocard (MSI ATi Radeon HD4870 X2 2GB), is there some way of fixing it cuz im getting fucking annoyed by it.

Same issue, although not at all so bad, with a brand new Atrix 650.

I see,have you tried another psu?

Then I don’t think we are talking about the same problem.

I managed to eliminate this noise problem just by grounding my pc.Simple!

Same freaking thing I just discovered after a month of struggling with OCZ. (OCZ Z1000M is noisy as hell with vsync off!) See my vids.

I have the same problem.
I got a new motherboard, i7 cpu and ddr3 memory and I started getting noise from either the psu (1100watt) or the gfx card (xfx gtx 260 black edition).
Strange thing is these 2 parts were in my amd 6000+ pc with no problems. When the noise stops in a game im playing, the screen freezes for about half a second which it very annoying.

Chieftec 650W psu, AMD Phenom II X2 550 cpu, GTX 275 gpu = squealing when vsync is off. But i dont get the sound when watching videos or scrolling a web page

i have a zalman 850w with the same problem, except mine does it regardless of the vsync setting. the really bad news is that i have my PSU custom sleeved so its not like i can just RMA the thing. I’ve tried various things recommended by others to no avail. Very dissapointed.

PS also wanted to add, you don’t need a 1000 watt PSU unless you are quad SLI of high end cards and other high end components. To make a power supply at 1000W they have to use more expensive parts that can handle it, the problem is with a cheaper 650-750W PSU the parts are will within their specs but in a 1000W+ they try to cut cost by using parts that are very close to the limits of their specs, you don’t have to pull 1000W to hit the limits of the specs of the parts inside the power supply.

thats not a capacitor problem, it is due to an inductor in the powersupply, it cant handle the ripple generated by the rapid change in power usage. it happens when they run beyond their specs in what there designed to handle, while that power supply is over $200, it has cheap parts in it that are not fully designed for working in a 1000W PSU, I HAD a zalman PSU and returned it for this same reason.

Run your 12V rail through a oscilloscope while gaming and you will see what I am talking about.

My pc power & cooling has the same problem. I thought it was my samsung hard drive. Should I get a new power supply? I mean with a highly overclocked processor and powerful gpu, it is very stable.

i’ve got the same problem, only when games are running, well and sometimes downloading stuff or watching youtube.

i’ve got a Coolermaster Real Power W700 with 2 HIS 4870 in crossfire, ive tested the system and it seemed to be stable, just dont understand why squeals happen :S

I have the exact same problem but I only hear it in three games tested: Crysis, Far Cry 2 and Red Faction Guerrilla. My FSP 800W Everest PSU makes this same squealing sound ONLY during loading screens and whilst on menus never during an actual game though. I usually have V-Sync on in games if my system can handle it.

Intel Core i7 965 Extreme 3.2Ghz
Asus P6T Deluxe
6Gb Corsair DDR3 1600
2Gb Sapphire Radeon HD4870X2
800W FSP Everest PSU
500Gb Seagate Baracuda HDD
Windows Vista Ultimate 64Bit

I would bet these companies are using cheap or under rated capacitors. I would replace all large capacitors with better ones and see if the situation improves.

I have the exact same problem… I have a NVIDIA graphics card and I’ve tried three different power supplies and they all make the same noise. It is a brand new computer – everything in it was bought brand new so I have no idea what it is!! Is it damaging anything???