Validating PSU choice

[Aniallation]

I paid $77 for the G750M. Upgrading from that to the EVGA G2 750W costs an additional $77 ($154 total). Further upgrading from the G2 750W to the G2 850W only costs an additional $13.

The big leap is the doubling of price by going from the G750M to the EVGA G2 750W / 850W.

 

I'm willing to pay the money if it's necessary, i.e. if the EVGA G2 will perform markedly better than the G750M, provide less risk for the other components, and/or last significantly longer. At the end of the day I won't cheap out on the PSU, if settling for the G750M rather than paying twice as much for the EVGA G2 is indeed cheaping out. If making that leap won't markedly impact performance, longevity, or the risk to the other PC components, then the upgrade doesn't seem economically rational.

 

I would not say that the 750G2 is worth twice as much as the G750M. Have you taken a look at the 850B2 suggested?

[Moliat]

I would not say that the 750G2 is worth twice as much as the G750M. Have you taken a look at the 850B2 suggested?

 

Yes, but after factoring in shipping costs (due to only a few retailers offering the B2s) there is virtually no price difference between the B2 and G2 PSUs.

 

In other words, if I'm going to replace the G750M, I might as well get the G2 over the B2 (due to no price difference), and the 850W over the 750W (again due to very little price difference). The question of whether or not I need to replace the G750M remains.

[Guest]

Yes, but after factoring in shipping costs (due to only a few retailers offering the B2s) there is virtually no price difference between the B2 and G2 PSUs.

 

In other words, if I'm going to replace the G750M, I might as well get the G2 over the B2 (due to no price difference), and the 850W over the 750W (again due to very little price difference). The question of whether or not I need to replace the G750M remains.

You might as well stick with the G750M then if you have doubts that you are going to SLI. No point in paying double the price when you might not need the wattage in the first place. The CM G750M will still work fine with your system and you get a 5 year warranty with it.

[Aniallation]

Yes, but after factoring in shipping costs (due to only a few retailers offering the B2s) there is virtually no price difference between the B2 and G2 PSUs.

 

In other words, if I'm going to replace the G750M, I might as well get the G2 over the B2 (due to no price difference), and the 850W over the 750W (again due to very little price difference). The question of whether or not I need to replace the G750M remains.

At that point just stick with the G750M then. 

 

Consider 980 Ti to use about the same 250W power envelope as the 7970/280X. Two of those will pull about 650W maximum from the whole system, which is perfectly fine with the G750M.

 

 

[Moliat]

You might as well stick with the G750M then if you have doubts that you are going to SLI. No point in paying double the price when you might not need the wattage in the first place. The CM G750M will still work fine with your system and you get a 5 year warranty with it.

 

It could be nice to have the opportunity for an SLI in the future, but this build has far exceeded the intended budget already, so getting SLI won't be relevant for at least a year. It might be in the future, however.

 

At that point just stick with the G750M then. 

 

Consider 980 Ti to use about the same 250W power envelope as the 7970/280X. Two of those will pull about 650W maximum from the whole system, which is perfectly fine with the G750M.

 

980 Ti G1 Gaming review: http://www.guru3d.com/articles-pages/gigabyte-geforce-gtx-980-ti-g1-gaming-soc-review,8.html

 

Guru3D recommends >600W PSU for a single 980 Ti G1 Gaming, and >900W for SLI.

They also explicitly urge "Purchase a proper power supply, ok?", so I just want to make sure the G750M is indeed a proper PSU. If it potentially compromises the integrity or performance of the computer, I'll gladly pay for the upgrade.

[Guest]

It could be nice to have the opportunity for an SLI in the future, but this build has far exceeded the intended budget already, so getting SLI won't be relevant for at least a year. It might be in the future, however.

 

 

980 Ti G1 Gaming review: http://www.guru3d.com/articles-pages/gigabyte-geforce-gtx-980-ti-g1-gaming-soc-review,8.html

 

Guru3D recommends >600W PSU for a single 980 Ti G1 Gaming, and >900W for SLI.

They also explicitly urge "Purchase a proper power supply, ok?", so I just want to make sure the G750M is indeed a proper PSU. If it potentially compromises the integrity or performance of the computer, I'll gladly pay for the upgrade.

 

If you do go SLI then 750W is enough anyway. Whilst the G750M isn't as good as the EVGA G2 there is no reason why it won't work fine. The oem is Channel Well who are probably one of the biggest oem's around and they do make some good units. Plus if the psu failed within 5 years then it is covered by warranty anyway.

 

Those recommendations that the manufacturer gives are just to cover themselves from people using poor quality units. You could run a 980ti on a good quality 450W psu without any problem.  

[Moliat]

Understood.

 

I then have one last concern to alleviate before I stop beating what is nearing a dead horse:

 

 

 

This GTX 980 Ti is rated as having a 250 Watt TDP, our measurements back that up, bear in mind that this is a peak maximum value under full stress. At this performance level you are looking at a card that consumes roughly 450 Watts for the PC in total (+50W peak as reported by TechPowerUp), that is okay. We think a 600~650 Watts PSU would be sufficient and, if you go with 2-way SLI, an 850~950 Watts power supply is recommended.

Also, if you plan to overclock the CPU/memory and / or GPU with added voltage, please do purchase a power supply with enough reserve. People often underestimate it, but if you tweak all three aforementioned variables, you can easily add 200 Watts to your peak power consumption budget.

 

Obviously 500 + 200 = 700, but as I've understood it, PSUs shouldn't run that close to maximum delivery (No?).

So even with overclocking the card (keeping in mind it's the G1 Gaming, not the reference 980 Ti), the G750M will do the trick?

[191x7]

Yeah, it will do.

 

As I said, I thought you were buying a new psu, not that you allready have bought the G750M, and since you have there is really no point in returning it (and going with something more expensive).

[Moliat]

Yeah, it will do.

 

As I said, I thought you were buying a new psu, not that you allready have bought the G750M, and since you have there is really no point in returning it (and going with something more expensive).

 

I see.

 

I can't stress enough though that I have no qualms about upgrading to the more expensive PSU, if sticking with the G750M would be imprudent considering the rest of the PC build. Returning it causes me no inconvenience, and I'd rather live with the additional cost of upgrading than having to face problems with the build down the road due to sticking with an inferior PSU.

[Aniallation]

980 Ti G1 Gaming review: http://www.guru3d.com/articles-pages/gigabyte-geforce-gtx-980-ti-g1-gaming-soc-review,8.html

 

Guru3D recommends >600W PSU for a single 980 Ti G1 Gaming, and >900W for SLI.

They also explicitly urge "Purchase a proper power supply, ok?", so I just want to make sure the G750M is indeed a proper PSU. If it potentially compromises the integrity or performance of the computer, I'll gladly pay for the upgrade.

According to that review a single 980 Ti G1 SOC uses less power then a 780 Ti.

 

780 Ti SLI is still less then 700W which the G750M will be fine to deliver for reasonable gaming load. It's not like you're pulling this much power from it 24/7.

 

 

[Moliat]

According to that review a single 980 Ti G1 SOC uses less power then a 780 Ti.

 

780 Ti SLI is still less then 700W which the G750M will be fine to deliver for reasonable gaming load. It's not like you're pulling this much power from it 24/7.

 

Gotcha. Since the consensus here seems to be that I should stick with the G750M, that's what I'll do.

 

Thank you everyone for your input and advice. It's been of great help!

 

Now on to deciding which 980 Ti to get...