Upgraded PSU, now Gigabyte GA-Z77Z-UD3H won't boot when all fans plugged in

[ingersol]

This is a weird one. I recently upgraded my PSU from a crappy Thermaltake 700w PSU (TR2 700W is the model) to a Corsair CX750. With the old PSU, the system booted up fine with all periphs attached. With the CX750 the system will only boot when I disconnect one of the fans. If I leave everything connected and try to power on the system with the CX750, it doesn't even start the fans up. It's completely dead. I might get a brief flash from the case's power LED light.

It's really just a coincidence that I disconnected a fan. I thought the fan was interfering with the 8 pin CPU power connector because my case is cramped so I took the fan out thinking that was it. Turned out it didn't matter what fan I disconnected, the system would power up as long as I disconnected one.

Now I can live with one less fan but I'm worried about what this might mean if I attach anything else. What's weird is the CX750 is 50w more potential power output than the old 700w PSU. I would have thought that the CX750 would have been able to handle what ever components I had and then some. I will be adding a new SSD drive and upgrading my video card in the next week so I'm hoping I can work this out.

So is it just bad luck? Will this new PSU simply not work with my rig?

Here's all the components on my rig:

CPU: Intel Core i7 3770K @ 3.50GHz (not overclocked)
CPU Heat Sink: Noctua NH-U9B (has 2 92mm fans)
RAM: 16.0GB Dual-Channel DDR3 @ 800MHz
Motherboard: Gigabyte GA-Z77X-UD3H
GPU: NVIDIA GeForce GTX 670 (factory overclocked)
Storage: 128GB OCZ-VERTEX3 (SSD)
2TB Seagate ST2000DM001-1CH164 (SATA)
Optical Drives: HL-DT-ST BD-RE WH14NS40
Audio: ASUS Xonar Essence STX Audio Device
Fans: 3 120mm fans.

 

[damric]

You just are not very good at picking good PSUs.

 

[ingersol]

You just are not very good at picking good PSUs.

Ugh. I picked the CX750 because it had so many good review. On amazon it's a 4.5 out of 5 based on over 1500 reviews. Is it really that crappy?

 

[damric]

You just are not very good at picking good PSUs.

Ugh. I picked the CX750 because it had so many good review. On amazon it's a 4.5 out of 5 based on over 1500 reviews. Is it really that crappy?

I've never seen a CX put out its rated wattage.

This recent review made me lol. It sums up the fact that I could easily answer 20 posts here per day about this PSU causing problems.

http://hardocp.com/article/2015/01/21/corsair_cx750_750w_power_supply_review/9#.VO_hWfkgul9

 

[ingersol]

You just are not very good at picking good PSUs.

Ugh. I picked the CX750 because it had so many good review. On amazon it's a 4.5 out of 5 based on over 1500 reviews. Is it really that crappy?

I've never seen a CX put out its rated wattage.

This recent review made me lol. It sums up the fact that I could easily answer 20 posts here per day about this PSU causing problems.

http://hardocp.com/article/2015/01/21/corsair_cx750_750w_power_supply_review/9#.VO_hWfkgul9

Well FML! There's $100 down the drain. Any recommendations as far as affordable and reliable PSUs?

 

[damric]

You just are not very good at picking good PSUs.

Ugh. I picked the CX750 because it had so many good review. On amazon it's a 4.5 out of 5 based on over 1500 reviews. Is it really that crappy?

I've never seen a CX put out its rated wattage.

This recent review made me lol. It sums up the fact that I could easily answer 20 posts here per day about this PSU causing problems.

http://hardocp.com/article/2015/01/21/corsair_cx750_750w_power_supply_review/9#.VO_hWfkgul9

Well FML! There's $100 down the drain. Any recommendations as far as affordable and reliable PSUs?

If it's new then you most likely return it with nominal restocking fee.

You got to be careful about labels. Corsair and EVGA have good ones, and bad ones.

This B2 is on sale right now. It will be hard to beat until you get over $100. Do some research on it. It's made by Superflower on the Golden Green platform. It's actually a gold rated unit but EVGA only paid for bronze certification. Good for you if you want to save a few bucks as it will have no problem pushing that rig of yours.

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($49.99 @ Newegg)
Total: $49.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-02-26 22:27 EST-0500

Even better:

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($84.99 @ NCIX US)
Total: $84.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-02-26 22:28 EST-0500

The G2 is also a Superflower, but this one is built on the LEADEX platform, one of the best on the market. It's going to have more bells and whistles than the B2 above.

 

[Archaic59]

XFX XTR 650W 80+ Gold Certified Fully-Modular ATX Power Supply

Made by Seasonic!

http://pcpartpicker.com/part/xfx-power-supply-p1650bbefx

 

[VonHamersmark]

So... the final statement on this was that the PSU wasn't giving enough power to boot with both fans on? Worked with the new PSU?