SeaSonic X750 750W 80 Plus Gold Full Modular Power Supply $90 after $15 Rebate + Free Shipping (expired)

Can you use the barcode from the Seasonic shipping box ? Both barcodes (one on shipping box and one on the actual product box) has same number and the one on shipping box also has the model number.

Quote from recountryman : Can you use the barcode from the Seasonic shipping box ? Both barcodes (one on shipping box and one on the actual product box) has same number and the one on shipping box also has the model number.

I guess that should be okay as long as the UPC is the same, and how did you get the Seasonic shipping box? Mine came with the Newegg box

Question:
Can any of you hear some high pitched noise when the computer is off? I just got my replacement. This new one doesn't have the fan problem, but it has some high pitched noise even when the computer is off. The noise is the same level when the computer is on and off. However, I can't hear the noise when the computer is on because of other fan noise. The noise isn't loud, and I have to get my head within 10-20" near the psu to be able to hear it. My old OCZ PSU is completely silent though; there's no noise even I put my ear on the psu. Is this normal? I did some googling, and I've read that high efficiency PSU are prone to have high pitched noise/buzz.

So far I've had zero issues with mine. I just sent the rebate off today and putting it through its paces for a week.

Quote from Kotori : I guess that should be okay as long as the UPC is the same, and how did you get the Seasonic shipping box? Mine came with the Newegg box Question: Can any of you hear some high pitched noise when the computer is off? I just got my replacement. This new one doesn't have the fan problem, but it has some high pitched noise even when the computer is off. The noise is the same level when the computer is on and off. However, I can't hear the noise when the computer is on because of other fan noise. The noise isn't loud, and I have to get my head within 10-20" near the psu to be able to hear it. My old OCZ PSU is completely silent though; there's no noise even I put my ear on the psu. Is this normal? I did some googling, and I've read that high efficiency PSU are prone to have high pitched noise/buzz.

Don't know why it came in it but the box is huge about the size of 4 of the boxes the ps itself is in. Maybe the noise you hear is the coil whine that some has complained about. I have a 2 year old x750 but haven't paid any attention is it makes a noise.

Quote from recountryman : Don't know why it came in it but the box is huge about the size of 4 of the boxes the ps itself is in. Maybe the noise you hear is the coil whine that some has complained about. I have a 2 year old x750 but haven't paid any attention is it makes a noise.

please listen to yours when the computer is off, to see if it has buzz noise or not?

The noise isn't loud, I have to get 10-20" near the psu to hear it, but it still bothers me a little because my old OCZ is silent.

Quote from Kotori : please listen to yours when the computer is off, to see if it has buzz noise or not? The noise isn't loud, I have to get 10-20" near the psu to hear it, but it still bothers me a little because my old OCZ is silent.

I too would be very interested to hear about people's experience with this high pitched noise. I have a first gen unit that I haven't taken out of the box yet because I've been planning to exchange it for a third gen unit. However, if this buzzing thing is a typical trade off for higher efficiency, I will pass (or at least test my own unit first to see if I will have to deal with it anyway).

I know the kind of high pitched humming you mean from past experience with other electronics, and I cannot STAND it.

I hope some new owners can give us their input about this.

Quote from tatiana30241 : I too would be very interested to hear about people's experience with this high pitched noise. I have a first gen unit that I haven't taken out of the box yet because I've been planning to exchange it for a third gen unit. However, if this buzzing thing is a typical trade off for higher efficiency, I will pass (or at least test my own unit first to see if I will have to deal with it anyway). I know the kind of high pitched humming you mean from past experience with other electronics, and I cannot STAND it. I hope some new owners can give us their input about this.

My computer runs very quiet, I set my 120mm fan to run on 5V only. The high pitched noise is, however, not noticeable when the computer is on because of the fan noise. The high pitched buzz is noticeable when the computer is off, and if I put my head 10-20" next to the PSU. The noise doesn't bother me much. However, the fact that this PSU is new and supposed to be a really good PSU, but it has this noise really bothers me; my 3 years old OCZ PSU has no buzzing noise at all even if I put my ear on the PSU.

I did some googling, and it seems that this high pitched noise issues is really common with Seasonic PSU. The noise level of each PSU is different. My first X750 buzzed a little less than my new X750 replacement, but its fan was defective though

Quote from Kotori : My computer runs very quiet, I set my 120mm fan to run on 5V only. The high pitched noise is, however, not noticeable when the computer is on because of the fan noise. The high pitched buzz is noticeable when the computer is off, and if I put my head 10-20" next to the PSU. The noise doesn't bother me much. However, the fact that this PSU is new and supposed to be a really good PSU, but it has this noise really bothers me; my 3 years old OCZ PSU has no buzzing noise at all even if I put my ear on the PSU. I did some googling, and it seems that this high pitched noise issues is really common with Seasonic PSU. The noise level of each PSU is different. My first X750 buzzed a little less than my new X750 replacement, but its fan was defective though

I am sending mine back to Newegg for a full refund. The high pitch noise is driving me crazy lol. I have 2 X-650's that are dead silent even at full load and I am quite surprised that the X-750 version is flawed.

I just build my first PC using the X750. When I turned on the power, nothing just happened. There are no lights or power fan spin. I replugged all connectors and still no any sign of power. I'm a newbie but I'm pretty sure to follow the steps. Could this power supply be a DOA? Thanks for any replies.

Quote from foreinter : I just build my first PC using the X750. When I turned on the power, nothing just happened. There are no lights or power fan spin. I replugged all connectors and still no any sign of power. I'm a newbie but I'm pretty sure to follow the steps. Could this power supply be a DOA? Thanks for any replies.

The fan is not supposed to spin at light loads. That is one of the main features of this unit. As for lights, I'm not sure what you're referring to.

You can tell if it is dead by whether or not your components are getting power. Try to turn on your computer. If it works, you're good. If not, there may be a problem (or you may have done something wrong).

Quote from evo3rs : I am sending mine back to Newegg for a full refund. The high pitch noise is driving me crazy lol. I have 2 X-650's that are dead silent even at full load and I am quite surprised that the X-750 version is flawed.

So you have the high pitched noise too? Drat. I may just have to plug in my first generation unit and see if it has it. I'd be interested to know if this is specific to the third gens or not.

Quote from Kotori : I did some googling, and it seems that this high pitched noise issues is really common with Seasonic PSU. The noise level of each PSU is different. My first X750 buzzed a little less than my new X750 replacement, but its fan was defective though

Would you mind sharing the links you found? I would like to know more about this.

Even if the buzzing is slight, I wouldn't be able to tolerate it. I have really sensitive ears, and a high pitched noise of any volume would drive me crazy. Besides, this PSU is supposed to be silent. For what it costs, I expect it to live up to the claim.

Quote from tatiana30241 : The fan is not supposed to spin at light loads. That is one of the main features of this unit. As for lights, I'm not sure what you're referring to. You can tell if it is dead by whether or not your components are getting power. Try to turn on your computer. If it works, you're good. If not, there may be a problem (or you may have done something wrong).

Sorry, the lights are the ones on front panels as well as the led lights on the motherboard. I use asrock extreme4 and the led light can tell u what's wrong. But I just can't see any sign of life. I just bought another power supply from local stores to test if the power supply is doa.

Quote from foreinter : Sorry, the lights are the ones on front panels as well as the led lights on the motherboard. I use asrock extreme4 and the led light can tell u what's wrong. But I just can't see any sign of life. I just bought another power supply from local stores to test if the power supply is doa.

Okay, I see. Let us know if it turns out to be dead. Good luck!

Quote from evo3rs : I am sending mine back to Newegg for a full refund. The high pitch noise is driving me crazy lol. I have 2 X-650's that are dead silent even at full load and I am quite surprised that the X-750 version is flawed.

How noisy is your X750? How far can you hear the noise?

Quote from foreinter : I just build my first PC using the X750. When I turned on the power, nothing just happened. There are no lights or power fan spin. I replugged all connectors and still no any sign of power. I'm a newbie but I'm pretty sure to follow the steps. Could this power supply be a DOA? Thanks for any replies.

Turn the Fan Switch to Normal instead of Hybrid, and turn the computer on. When the fan switch is in Normal, the fan will run all the time in silent mode, and the fan speed will increase accordingly to the load.

Quote from tatiana30241 : Would you mind sharing the links you found? I would like to know more about this. Even if the buzzing is slight, I wouldn't be able to tolerate it. I have really sensitive ears, and a high pitched noise of any volume would drive me crazy. Besides, this PSU is supposed to be silent. For what it costs, I expect it to live up to the claim.

http://forums.whirlpool.net.au/archive/1731077
http://www.overclock.net/t/127473...coil-whine
http://forums.anandtech.com/showt...?t=2273602
http://www.tomshardware.com/forum...ith-videos

A Corsair Tech rep said that High efficiency are prone to have high pitched noise/buzz, if it's not noticeable, it's okay

Like I said before, I can't hear it when my computer is on, but I can hear it when the computer is OFF about 10-20" away from the psu, I have to pay attention to be able to hear to it though. I guess the chance that I'll get another buzzing PSU is high, so I may have to settle with this one

Quote from tatiana30241 : Okay, I see. Let us know if it turns out to be dead. Good luck!

I just did some research and the reviews on Newegg also mentioned some DOA. The frustrated thing is that I returned the HX750 to Egg and bought this one. But it's apparently not working. I know this is my first build and I might make some mistakes. But the no sign of life is just not right. BTW, one side of heatsink on south bridge on the Asrock Extreme 4 motherboard I bought from Amazon was ripped off when it's brand new out of the box. I'm just surprised how many other things can happen in my first build. The good thing is Amazon sent the replacement with overnight shipping.