PSU fan spinning up

dt97583 · 13 Oct 2013 at 14:26

Hi,

I'm slightly disappointed with my XFX Pro 650W PSU compared to my old Corsair TX650 V2 - I replaced it due to a really annoying coil whine but a big plus of the Corsair was the fan never spinning up. Would any of the following likely not spin up similar to the TX650 V2?

RJC said:
YOUR BASKET
1 x Antec High Current Gamer 620W '80 Plus Bronze' Power Supply £79.99
1 x Seasonic S12II 620W '80 Plus Bronze' Power Supply £67.99
1 x Antec High Current Gamer 520W '80 Plus Bronze' Power Supply £59.99
1 x Corsair Builder Series CX 600W V2 '80 Plus Bronze' Power Supply (CP-9020048-UK) £59.99
Total : £280.56 (includes shipping : £10.50).

If not I'm half tempted to get another TX650 V2...

oceaness · 13 Oct 2013 at 14:48

When you say spinning up do you mean spinning faster or spinning at all as I don't believe any of those have hybrid fan modes. I think they'll spin all the time.

I personally wouldn't use the Corsair builder series.

The TX 650 V2 says "An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature".

Does it actually go off or does it just spin slowly?

dt97583 · 13 Oct 2013 at 14:55

oceaness said:
The TX 650 V2 says "An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature".

Does it actually go off or does it just spin slowly?

The V2 fan never spun unless I was stress testing the machine. The XFX fan constantly spins which isn't exactly how I understood this page: http://xfxforce.com/en-gb/Featured/Why-PSU.aspx

oceaness · 13 Oct 2013 at 14:59

Scratch this, I don't think it's relevant.

You could maybe do a test with the PSU by shorting out any green and black pin on the motherboard connector and attaching just a case fan or something small like that. If the PSU fan keeps spinning constantly then either ambient temperature is over 25°C or the unit is faulty?

oceaness · 13 Oct 2013 at 15:05

I think I may have just worked it out, I don't believe the 650 watt unit has the hybrid fan mode. Only the 750+ units do, that page doesn't make that very clear.

Check out the two pages. The bottom left of the 750 shows the fan profile, whist the 650 makes no mention of it.

650

750

The Seasonic X-Series 650w has proper hybrid fan mode but at £119.99 is considerably more expensive than the ones you have listed.

dt97583 · 13 Oct 2013 at 15:14

oceaness said:
I think I may have just worked it out, I don't believe the 650 watt unit has the hybrid fan mode. Only the 750+ units do, that page doesn't make that very clear.

Check out the two pages. The bottom left of the 750 shows the fan profile, whist the 650 makes no mention of it.

650

750

The Seasonic X-Series 650w has proper hybrid fan mode but at £119.99 is considerably more expensive than the ones you have listed.

Thanks. Typical - OCUK not stocking the 750 model!

oceaness · 13 Oct 2013 at 15:19

By the looks of it Corsair have expanded their hybrid fan mode to some of their other ranges including your TX 650 V2, so that explains why the fan stops. That would probably make it by far the cheapest semi fan-less PSU.

The TX650 and TX650 V2 are both mode by Seasonic so they are quality units, I'm surprised it has coil whine. Could you get it swapped under warranty?

dt97583 · 13 Oct 2013 at 15:28

oceaness said:
By the looks of it Corsair have expanded their hybrid fan mode to some of their other ranges including your TX 650 V2, so that explains why the fan stops. That would probably make it by far the cheapest semi fan-less PSU.

The TX650 and TX650 V2 are both mode by Seasonic so they are quality units, I'm surprised it has coil whine. Could you get it swapped under warranty?

I went into Overclockers and they swapped it out - should have opted for a straight swap

Will contact them over at their CS section. Thanks

oceaness · 13 Oct 2013 at 15:31

The XFX are also Seasonic, so also good quality, they just don't have the fan profile under 750 watts, seems rather silly really

Hope you can get it swapped back to the TX 650 V2

pastymuncher · 13 Oct 2013 at 19:20

oceaness said:
By the looks of it Corsair have expanded their hybrid fan mode to some of their other ranges including your TX 650 V2, so that explains why the fan stops. That would probably make it by far the cheapest semi fan-less PSU.

The TX650 and TX650 V2 are both mode by Seasonic so they are quality units, I'm surprised it has coil whine. Could you get it swapped under warranty?

It's worth noting that the TX650 and TX650v2 are discontinued now and like most of their psu's the replacement is now a CWT build. Seasonic only build three psu's for Corsair now. They built their reputation using high end builders such as Seasonic then swapped to CWT to cut cost's (and quality, especially with the CX range) while keeping the prices high.

oceaness · 13 Oct 2013 at 22:18

So are the current TX650 v2's in stock Seasonic, and the last ones left, or CWT now?

dt97583 · 13 Oct 2013 at 22:43

oceaness said:
So are the current TX650 v2's in stock Seasonic, and the last ones left, or CWT now?

Good question. Either way I'd rather have a noiseless CWT manufactured PSU rather than an XFX fan spinning unnecessarily.

pastymuncher · 14 Oct 2013 at 10:30

Going by the part number this is not a v2. the tx series is no longer made and was replaced by the rm series. the part number cp-9020042-uk suggests it is the model that replaced the v2 and is actually built by chicony power technology. you can see for yourselves here.

the rm series that replaces the tx series seems to be very good units. they can deliver all of their stated output on the 12v rails and from this review seem very quiet. The 750w and 850w units are built by Chicony Power Technology while all the others are CWT.