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Corsair CX450M vs EVGA 750 GQ
The Corsair CX450M makes for a good, if unremarkable, PSU for people with a $55 budget.
The EVGA 750 GQ, however, is merely mediocre at its $129 asking price, when compared to similarly priced products, and won't satisfy the needs of most people.
In either case, we suggest that you first take a look at some other options at the $55 and $130 price points before committing to one of these - it's likely that you'll be able to find some better alternatives.
If you're still interested in learning more about the Corsair CX450M and EVGA 750 GQ, however, we wrote a summary of what we could find about them:
The Corsair CX450M was loved by reviewers at Tom's Hardware, a highly trusted source that performs reliable in-depth testing. It did great in its "Best Power Supplies 2021" roundup where it was named its "Best Cheap PSU ($60/£60 or less)", which, in itself, makes it a product worth considering.
As for the EVGA 750 GQ analysis - it impressed reviewers at Windows Central, a source that's known for its objective testing and well-thought-out methodology - it performed great in its "Best PSUs for AMD Threadripper 3960X in 2020" roundup and earned the "Great Value" title.
As a last step, we wanted to do a head-to-head Corsair CX450M vs. EVGA 750 GQ comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.