Sign in with
Sign up | Sign in
Your question

Seeing Noticeable differences between Corsair CX750RM vs CX750M - Overheating Issues

Tags:
  • Power Supplies
  • Overheat
  • Components
  • Corsair
Last response: in Components
Share
September 30, 2014 8:26:39 PM

So turned on PC today and noticed it wasn't able to make it to POST! It would attempt to start up for about ~2sec then cut off and immediately attempt to start back up (no beeps etc). So I checked all the PSU connections, removed / set the RAM back in. Still no dice.

To ensure it wasn't a short I removed the fans / video card and tried to boot it, still same problem. At this point I surmised it must be the PSU and went off to buy another to test this theory. Unfortunately at my local best buy they didn't have the exact same Corsair PSU. I ended up buying this Corsair CX750M (instead of the CX750RM seen in specs).

After replacing it, seemed good! Booted up no problem, started playing some games etc. However I immediately noticed a lot of extra heat coming from it. After maybe 30 mins I started to hear a pretty annoying whirrr from the PSU, presumably fan kicking on. I did a HWInfo but only saw the Auxiliary out of wack (~113 Celsius) but saw a few form posts noting this # can be invalid.

I am skeptical this is a bad ventilation issue - as I have another PC with the specs below running smoothly! My question is should I see such a noticeable difference in heat with the below spec changing between the Corsair 750RM to just 750M?

Specs:

  • Corsair Carbide Series Black 300R Windowed Computer Case (CC-9011017-WW​)
  • EVGA GeForce GTX770 w/EVGA ACX Cooler 2GB GDDR5 256bit, Dual-Link DVI-I, DVI-D,
  • HDMI,DP, SLI Ready (02G-P4-2773-K​R) Graphics Cards 02G-P4-2773-KR
  • Intel 530 Series 240GB 2.5-Inch Internal Solid State Drive (Reseller Kit) SSDSC2BW240A4K​5
  • Corsair RM Series 750 Watt ATX/EPS 80PLUS Gold-Certified Power Supply - CP-9020055-NA RM750
  • ASRock LGA1155/Intel Z75/DDR3/Quad CrossFireX /CrossFireX/SA​TA3/USB3.0/A/GB​E/ATX Motherboard Z75 PRO3
  • G.SKILL Ares Series 16GB (2 x 8GB) 240-Pin SDRAM DDR3 1866 (PC3 14900) Desktop Memory F3-1866C10D-16​GAB
  • Intel Core i5-3570K Quad-Core Processor 3.4 GHz 4 Core LGA 1155 - BX80637I53570K



  • More about : noticeable differences corsair cx750rm cx750m overheating issues

    a b ) Power supply
    September 30, 2014 8:29:58 PM

    There shouldnt be an issue with the temperatures by much. However you went from a tier 3 PSU to a tier 3.
    I would recommend looking into a new, higher quality PSU from Antec, Corsair HX or AX, EVGA, Seasonic, or XFX.
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 8:33:07 PM

    Corsair CX750RM ?
    m
    0
    l
    Related resources
    a b ) Power supply
    September 30, 2014 8:34:02 PM

    I think, or rather assumed its supposed to be the RM?
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 8:35:21 PM

    They are both poor power supplies and some lots of the RM 750 and 850 have had thermal issues.
    m
    0
    l
    September 30, 2014 8:35:32 PM

    I'm just scared to leaving it running for a long period of time now... I don't want to cause a short on the MOBO! What should I be looking for in HWinfo to note a problem with the extra heat its generating while I look for a new PSU to replace it?
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 8:35:51 PM

    Get a 750w EVGA G2. :D 
    m
    1
    l
    September 30, 2014 8:43:23 PM

    SR-71 Blackbird said:
    Get a 750w EVGA G2. :D 


    I can def consider that, I guess next step is to try to grab something in the meantime till I can get a proper replacement. Any other suggestions? Would the HX from Corsair even be worth it? Looking for a PSU like the RM that doesn't need to kick on unless needed / really quiet.
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 8:44:13 PM

    HX corsair power supplies are real good.
    m
    0
    l
    a b ) Power supply
    September 30, 2014 8:44:56 PM

    I wouldnt bother with a temp replacement. Go straight to the new PSU, HX is a good reliable model, I'm running a TR2 crossing my fingers until I can afford a replacement.
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 8:45:50 PM

    If you can afford the EVGA G2 it's well wort it , great power supplies.

    m
    0
    l
    September 30, 2014 9:12:25 PM

    Thanks for the help! I'll def go ahead and return the 750M and look for a better one to replace it. In the meantime might jump on the RM's replacement warrenty, see what they can do for me, maybe even upgrade to HX / AX?.. we'll see!

    On Amazon currently the HX & AX are going for the same price. Any reson not to just jump up to the AX if I wanted? Also what does HX not being fully modular mean?

    Edit:
    Didn't notice the Power Supply Sticky thread in this section, looks like the AX is the better option!:
    http://www.tomshardware.com/answers/id-1804779/power-su...
    m
    0
    l
    a c 2489 ) Power supply
    September 30, 2014 9:32:16 PM

    G2 is better than both but Corsair AX , AXi , HX , HX i , and TX VERSION 2 are decent.
    m
    0
    l
    October 1, 2014 10:31:16 PM

    Anyone think I need more than 760 Watts to run my setup?
    m
    0
    l
    October 2, 2014 11:24:53 AM

    I ended up here because of a random shutdown on my CX750M. I have maybe 600watts peak on my build. I don't think you need more than 760, but you might as well figure out what you're going to need with another one of your graphics cards in SLI. We all know that you're going to want to do that at some point. I just built my pc and I'm already realizing that I should have bought a better PSU and left enough room to add another graphics card. :/ 
    m
    0
    l
    !