Can someone briefly explain pros and cons about some power supply units?

noor3y619

Reputable
Sep 8, 2017
12
0
4,510
Rosewill Gaming Power Supply / PSU, 1000 Watt (1000W) 80 PLUS Bronze Certified PSU with Silent and Blue LED 135mm Fan and Auto Fan Speed Control, Semi-modular Design, RBR-1000MS

CORSAIR HXi Series, HX1000i, 1000 Watt, Fully Modular Digital Power Supply, 80+ Platinum Certified

 
Solution
An TXM 850w cheaper than a TXM 550w? Sure, go for it. Just understand that size does not mean quality, just size. Your pc as is is only using @400w totally maxed out, most gaming is only using @300-320w or so, so an 850w psu is so far overkill its almost a joke. I'm running an i7-3770K @4.9GHz OC, a gtx970 at 124% OC, hdd, ssd, 4 fans, optical, various USB, 280mm aio all from an Evga G2 550w with plenty of room to spare, so much so that the psu doesn't get hot enough most times for the fan to even kick on higher speeds.

You honestly do not need anything close to 850w, but if that's the cheapest, go for it. In Corsair's lineup, you'd be better off with a RMx 550/650w than a TXM 850w. Better grade psu all around.
Why 1000W power supplies? Do you intend to add another two graphics cards?

Your current system specs would be fine on a high quality 450/550 PSU (Besides the Seasonic Focus Plus).

Anyways, the mentioned Rosewill 1000 only has one OKish review, at Hexus.
Performance isn’t very good: low efficiency, loose voltage regulation, ripple isn’t superb.
The warmer PSU may cause lower longevity, but the review didn’t analyse its internals.
It has an RGB fan, and just 3 year warranty.

The HX1000i has a much more in-depth review available at TechPowerUp. It has its own Pros/Cons page, so I won’t bother there.

The HX1000I is the better PSU.
 
An TXM 850w cheaper than a TXM 550w? Sure, go for it. Just understand that size does not mean quality, just size. Your pc as is is only using @400w totally maxed out, most gaming is only using @300-320w or so, so an 850w psu is so far overkill its almost a joke. I'm running an i7-3770K @4.9GHz OC, a gtx970 at 124% OC, hdd, ssd, 4 fans, optical, various USB, 280mm aio all from an Evga G2 550w with plenty of room to spare, so much so that the psu doesn't get hot enough most times for the fan to even kick on higher speeds.

You honestly do not need anything close to 850w, but if that's the cheapest, go for it. In Corsair's lineup, you'd be better off with a RMx 550/650w than a TXM 850w. Better grade psu all around.
 
Solution
Huh, can't see any plausible way a psu would have compatability issues. 12v DC output through an 8 pin connector. It's not like there's any difference to any other 12v DC through an 8 pin connector, unless the outputs are seriously out of spec, which on the Focus, aren't.

The only issues I could find were other issues with asus strix 970s that were generally no different, standard 'lemons' with ppl who happened to have a Seasonic Focus. Also found similar 970 'lemons' with Evga psu owners corsair psu owners and a few others. The issue being the card, not any compatability with a psu in particular.
 


Please don’t spam something you have no idea about. If you are trying to deny an argument, put in 5m of research, and save the trouble and embarrassment.

Seasonic admits to this:
https://gathering.tweakers.net/forum/list_messages/1801761/46
1. Asus GTX 970 Strix: Blackscreen under load. After extensive testing, we found the GPU (and only this version of GTX 970) had a higher than normal ripple when under load and we resolved this issue with a new PCIe cable to reduce the ripple. If you have a FOCUS Plus paired to an Asus GTX 970 Strix, please contact us and we will ship to you, free of charge, a new PCIe cable that will suppress the excess ripple emitted by the GPU.

You can ask for a cable.
I’d rather buy a PSU already compatible.
 


You are full of it as usual and you don't have a freaking clue what they are talking about.

If the card has an issue, it would be with ANY PSU, not just the Focus +.

Unless they have in cable capacitors.... The better PSU's DON'T..... Because they don't need them.

So it's an ASUS issue, not a PSU issue, nobody can help that they made a crap card with poor power control.

So any of the Seasonic, EVGA, Corsair etc that don't have in cable capacitors (Having them isn't a good thing) will have the same problem.

So it's not a Seasonic issue, or a EVGA, Corsair etc issue.

Seasonic is protecting their product from that card so it doesn't doesn't burn up the PSU with that poor power regulation in the card.

I am sure EVGA and Corsair are doing the same thing.

Anyhow a quick search will reveal the massive issues with that Asus Strix 970 are well known. And that's across the board.
 
The card has an issue. The PSU has an issue. Combining the two ends in an issue for the user. Specifically a Seasonic Focus Plus + Asus Strix 970 issue.

If you have sensible evidence the GPU is incompatible with other PSU models, not just assuming every PSU without cable caps can't handle it, please share - it will help OP's choice. I haven't seen any issue like this with the Strix 970 other than the Focus series.
Otherwise don't say things you don't know about or aren't true.

My perspective of the situation - the PSU has design problems handling high ripple from GPU. Offering in-cable caps was just a solution Seasonic used.

From someone with vastly more knowledge than us combined, https://gathering.tweakers.net/forum/list_message/55945571#55945571
Lord_Dain wrote on Thursday, July 26, 2018 @ 09:11 :
Is there an overview of psu with this issue? Starting point is nothing about it unfortunately.
Only Seasonic Focus and its derivatives.


that don't have in cable capacitors (Having them isn't a good thing)
Which is just a further example why the Seasonic Focus Plus, aswell as EVGA G3, Corsair RMx, etc, may not be interesting to OP.
 
All I know is I have an Asus Strix gtx970 powered by an Evga G2 550w, that has the same inline caps as the Evga G3, uses the same 8pin connector and is sitting quite pleasantly on a 124% OC. What I can also say is that the power limit is also not set at the 25 maximum allowed but at 14 and increasing that did not allow further stability, in fact it did create instability, but my assumption was the card vrms/vram was receiving too much power and overheating/throttling. But who knows.
 


It's really card specific and it's not all of them that have the problem or so it seems from reading up on it.

However if the card does have the issue then it really doesn't matter what PSU one has from what I have been reading.

If I had one and it had issues I would send it back to ASUS personally for a replacement.


We haven't seen hardly any of it here on Tom's if at all.

It's defiantly not a PSU issue though.

The Focus + does have cable caps.









 
Cable caps should not make a difference. A cap is a cap, doesn't matter if it's inside the psu like most, right in between the buss and socket, or in the cable itself. My only conclusion is that it's a design flaw in the custom pcb on the strix 970 that would not have been an issue prior as the psus didn't exist back then, but do now. My guess would be that the caps are doing their job, but inside the power delivery system certain amplitudes and frequencies are setting up harmonics the card isn't equipped to deal with.
 


That's for the most part what I have been reading about it.

Since it's only that one model card I don't doubt that is the issue.

With the PSU's in question, that have VERY LOW Ripple.....


Defiantly a flaw in the cards PCB.