Corsair CX650F vs. RM650?

sling-shot

Wise Old Owl
I am looking to buy a new PSU to replace my CX450.
RM650 was recommended in another thread earlier but it costs near to 9 K. CX650 is available for 5 K from MDComputers. Should I buy that instead?
 
What will it be powering?

There's Deepcool PM650D, an 80+ gold PSU for 5k.

RM650 will be a top tier PSU in terms of quality. Top tier PSUs are highly recommended for higher end systems, like sometimes momentarily the system power draw might spike too much, tier A PSUs will handle those better & so on. Basically if you are spending 120k+ on components, you can spend 9k for a good PSU to go with it.

I feel RM650 & RM750 are overpriced here. I bought NZXT C750 for under 9k, another tier A PSU. MSI A750GF & A650GF are tier A as well.

Also modular vs non-modular adds cost depends on you if you want the former, but almost all top tier PSUs are modular.

A good deal at 7.8k:
Msi MPG A850GF SMPS - 850 Watt 80 Plus Gold Certification Fully Modular PSU With Active PFC
PSU only draws how much is required from the wall.
 
OP
sling-shot

sling-shot

Wise Old Owl
My system is very basic at present. 2200G on B350, 2 regular hard disks. No discrete GPU. Present PSU is CX450.

But for the last 2+ years I am tearing my hair out due to either system refusing to power on at all or randomly shutting down. A slight fluctuation in ac voltage causes hard instant shutdown, sometimes followed by reboot by itself.
In general we have constant power fluctuations.

Earthing is tested and found to be OK. UPS battery and board are both new. So now I want to try putting a better PSU and see. My target is to keep the PSU in its most relaxed state so that it won't give up during fluctuations.
If that works, then I plan to upgrade.

Budget wise 9K for RM650 feels too much. CX650 is also claimed to be fully modular. But is more budget friendly.
 
OP
sling-shot

sling-shot

Wise Old Owl
CV450 is inferior to CX450? I thought a fully modular may be different from a regular type and be able to withstand/overcome the fluctuations better.

I always dreamed to have a low to medium range graphic card. The GPU prices and the mysterious shutdown bug stopped me. If I resolve the bug with the new PSU, I will get a GPU soonish when prices become more affordable.

This seems to be a good compromise for me unless there is a strong NO - CX550M Corsair CX550M SMPS - 550 Watt 80 Plus Bronze Certification Semi Modular PSU (CP-9020220-IN)
 
CV450 is inferior to CX450? I thought a fully modular may be different from a regular type and be able to withstand/overcome the fluctuations better.

I always dreamed to have a low to medium range graphic card. The GPU prices and the mysterious shutdown bug stopped me. If I resolve the bug with the new PSU, I will get a GPU soonish when prices become more affordable.

This seems to be a good compromise for me unless there is a strong NO - CX550M Corsair CX550M SMPS - 550 Watt 80 Plus Bronze Certification Semi Modular PSU (CP-9020220-IN)
CX is better than CV, but for low end PCs, not much use of a higher end PSU, so can cheap out a bit on PSU.

That is a decent price.
 
OP
sling-shot

sling-shot

Wise Old Owl
CX550M from MD Computers at 4 K. Received it today and installed. Working for the last one hour. Waiting for a good power fluctuation to occur so that I can be assured this was the right choice.

 

topgear

Super Moderator
Staff member
CX550M from MD Computers at 4 K. Received it today and installed. Working for the last one hour. Waiting for a good power fluctuation to occur so that I can be assured this was the right choice.


Don't you use UPS ?
 
OP
sling-shot

sling-shot

Wise Old Owl
I do. But my PC was still shutting down randomly during fluctuations. The power supply is supposed to keep the system running for 8 ms or some small time during which UPS is ready. But my PSU failed there.

NOTE: It is working well now.
 
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