[SOLVED] when i turn the pc on it turns off after a few seconds, then on and off repeatedly

Mar 10, 2019
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so i tried to install an rx570 on an old computed that didn't had a gpu, i tried to use a 6 pin to 8 pin adapter since the psu only had a 6 pin pcie, it failed, nothing showed on the monitor, i tried to turn it on with the new gpu disconnected from the psu and it worked fine, i tried a few times to make it work with the gpu, i reset the bios to the optimized defaults and i tried again, it worked fine without the gpu, but then i tried to connect the gpu and again it didn't display anything, i disconnected the gpu and tried to turn it on, but now even with the gpu disconnected it will only be on for a few seconds and then suddenly turn off, and then on, and then off repeatedly until i turn off the psu.

since i tried to install the new gpu. i remember sometimes when i turned on the pc it will turn off in a few seconds one time but then it would turn on automatically and start working properly, i not sure but it think it happened the first time after i tried connecting or disconnecting the gpu.

so basically now when i turn on the computer it cycles trough on and off automatically, it never gets to the starting windows screen nor it passes the bios screen i cannot acces bios.

i think i broke the psu, but i'm not sure, i was going to buy a new one to test this, but i don't have much money so i wanted to ask before buying it if you think it is the psu or the motherboard or something else

the psu is a non certified but supposedly 70% efficient cooler master elite power 460w, which was released on 2009 i'm not sure how old this unit actually is, the MB is a gigabyte GA-H77-DS3H, it has an i5-2310.

sorry for the long post and the bad English, i really want it to work since it is my first chance to have a decent computer.
 

Darkbreeze

Titan
Moderator
Go check to see if there is a newer BIOS version available for your motherboard than the one that is currently installed.

First of all, that power supply was garbage when it was new, and now that it is about 9-10 years old, it's probably about 30% or more degraded from where it was then especially considering the very low quality capacitors and other hardware used inside that unit.



Get a good 550w power supply and try again.


Click the spoiler for PSU model recommendations.

Let's start with the biggest misconception out there, which is that if a unit has high watts it will be ok or is good. No. Just, no.

There are plenty of 750-1000w units out there that I wouldn't trust to power a light bulb and might in fact be more dangerous due to their supposedly high capacity due to poor or non-existent protections inside the unit.

If the platform isn't good to begin with, how many watts or amps it says it can support is irrelevant.

Higher 80plus certification doesn't mean anything, UNLESS it's on an already known to be high quality PSU platform. For example, a Seasonic Prime platinum unit is going to be a better product than a Seasonic Prime Gold unit, because we already know the Prime platform is very good, and platinum efficiency along with it shows there are some improvements internally to account for the higher efficiency.

In a case like that, it might be worth it. It's likely the unit will create less heat, it will probably have better performance in regard to ripple, noise and voltage regulation. It might shave a few pennies, or dollars, off the electric bill over the course of a year.

Other than that, it is not going to perform any better than the same platform with Gold efficiency. On the other hand, just because a unit has Titanium 80plus ratings doesn't mean the unit is any good at all. For example, there are Raidmax units with Titanium efficiency and I wouldn't trust one of those to power a light bulb. There are a lot of units like this out there.

If the platform isn't good to begin with, whether or not it has an 80plus certification or not is irrelevant.

Whatever you do, don't EVER buy a power supply based on whether it has RGB or lighting, or looks like it might be a quality unit. Some of the biggest hunks of junk out there look just as good as a Seasonic Prime Ultra Titanium, but I assure you, they are not. So far as I've seen there are really no excellent units out there that have RGB built in. Maybe one or two models, but rest assured you'll be be paying for the lighting, not for the quality of the power supply.

I don't know what country you reside in, and I know that sometimes it's hard to come by good units in some regions, but when possible, when it comes time to get that PSU, I'd stick to the following if you can.

Seasonic. Seasonic isn't just a brand, they are a PSU manufacturer, unlike many of the PSU brands you see they make their own power supply platforms AND a great many of the very good PSU models out there from other brands like Antec, Corsair and older XFX are made by Seasonic.

Just about anything made by Seasonic is good quality for the most part. There are really no bad Seasonic units and only a very few that are even somewhat mediocre. They do make a few less-good quality OEM style units, but mostly those are not going to be units you come across at most vendors, and they are still not bad. Also, the S12II and M12II 520 and 620w units are older, group regulated models. At one time they were among the best units you could buy. Now, they are outdated and not as good as almost any other Seasonic models. They are however still better than a LOT of newer designs by other manufacturers.

The Seasonic 520w and 620w S12II/M12II units CAN be used on newer Intel platforms, if you turn off C6/C7 in the bios, but I'd really recommend a newer platform whenever possible. Prices are usually pretty good on those though, so sometimes it's worth accepting the lack of DC-DC on the internal platform. Higher capacity versions of the High current gamer are not based on that platform, so they are fine. Those being the 750w and higher versions.

Most common currently, in order of preference, would be the Seasonic Focus series, then Focus plus, then Prime, then Prime ultra. It's worth mentioning that there are generally Gold, Platinum and Titanium versions within each, or most, of those series, but that does not necessarily mean that a Focus plus Platinum is necessarily better than a Prime Gold. It only means that it scored better in the 80plus efficiency testing, not that the platform is better.

Again, don't let yourself get tangled up in the idea that a higher 80plus rating specifically means that it is a better unit than another one with a lower rating, unless you know that it is a good platform from the start. All these Focus and Prime units are pretty good so you can somewhat focus on the 80plus rating when deciding which of them to choose.

Super Flower Super Flower is another PSU manufacturer. They also make most of the good units sold by EVGA like the G2, G3, P2 and T2 models.

Super Flower doesn't have a very broad availability for the units with their own brand name on them, and are not available in a lot of countries but for those where there is availability you want to look at the Leadex and Leadex II models. The Golden green platform is fairly decent too but is getting rather long in the tooth as a platform AND I've seen some reviews indicating a few shortcomings on units based on this platform.

Even so, it's a great deal better than a lot of other platforms out there so you could certainly do worse than a Golden green model. Units based on the Leadex and Leadex II platforms are much better though.

Corsair. The CX and CXm units are ok as a budget option, but I do not recommend pairing them with gaming cards. The newer 2017 models of CX and CXm are better than the older ones, but still not what we'd call terrific, so if it specifically says 2017 model, or it has a capacity other than an even 100, like 550w, 650w, 750w, etc., then it's likely at least better than those older ones. Aside from that, any of the TX, RMx, RMi, HX, HXi, AX or AXi units are good. Those are listed from best to worst, with the best being the AX and AXi units.

Antec. The True power classic units are made by Seasonic, and are very good, but are not modular. The High current gamer 520w and 620w, or any other PSU you see on the market that is 520w or 620w, are also made by Seasonic, based on the S12II and M12II platform for modern versions, and are pretty good units but again they are an older platform that is group regulated so if you go with a Haswell or newer Intel configuration you will want to avoid those because they do not support the C6/C7 Intel low power states.

The Antec High current gamer 750w and 850w units are very good and are not the older design, which came in 520w and 620w capacities and were good for back then but again, are an aging Seasonic platform that is not the best choice most of the time these days. Occasionally, these older units MIGHT be the best unit available and you could do worse than one of them, but a newer DC-DC platform is desirable when possible if it doesn't mean sacrificing quality elsewhere in the platform. There are however older and newer HCG models, so exact model number will likely be a factor if choosing one of these however both the older models and the newer models are good.

Antec Edge units are ok too, but reviews indicate that they have noisy fan profiles. I'd only choose this model if it is on sale or the aesthetics match up with your color scheme or design. Still a good power supply but maybe a little aggressive on the fan profile. This may have been cured on newer Edge models so reading professional tear down reviews is still the best idea.

Antec Earthwatts Gold units are very good also.

BeQuiet. BeQuiet does have a few decent models, BUT, you must be VERY selective about which of their models you put your trust in. From model to model their are huge differences in both quality and performance, even with the same series. If you cannot find a review for a BeQuiet unit on HardOCP, JonnyGuru or Tom's hardware that SPECIFICALLY says it is a very good unit, and does not have any significant issues in the "cons" category, I would avoid it. In fact, I'd probably avoid it anyhow unless there is a very great sale on one that has good reviews, because their units are generally more expensive than MUCH better units from Antec, Seasonic, EVGA and Corsair.

Super Flower. They are like Seasonic and they make power supplies for a variety of other companies, like EVGA. Super Flower units are usually pretty good. I'd stick to the Leadex, Leadex II and Golden Green models.

EVGA. They have BOTH good and not very good models.

Not very good are the W1, N1, B1, B3 (All models except the 650w model), BQ, BR, BT and G1 NEX models.

Good models are the B2, B3 650w, G2, G2L, G3, GQ, P2 and T2 models.

FSP. They used to be very mediocre, and are a PSU manufacturer like Seasonic and Super Flower, although not as well trusted based on historical performance. Currently the FSP Hydro G and Hydro X units are pretty good.

I would avoid Thermaltake and Cooler Master. They do have a few good units, but most of the models they sell are either poor or mediocre, and the ones they have that ARE good are usually way overpriced.

This is just ONE example of why I say that. Very new and modern CM unit. One of the worst scores ever seen on JonnyGuru for a well known brand name product. Doesn't look to be much better than a Raidmax unit. Sad.


And most of the models I have linked to the reviews of at the following link are at least good, with most of them being fantastic.


Certainly there ARE some good units out there that you won't see above among those I've listed, but they are few and far between, much as a hidden nugget of gold you find in a crevice among otherwise ordinary rocks and don't EVER assume a unit is good just because of the brand.

If you cannot find an IN DEPTH, REPUTABLE review on Tom's hardware, JonnyGuru, HardOCP, Hardware secrets (Old reviews by Gabe Torres), Kitguru (Only Aris reviews), TechPowerUP, SilentPC crew or a similar site that does much more than simply a review of the unboxing and basic tests that don't include reliable results for ripple, noise, voltage regulation and a complete teardown of the unit including identification of the internal platform, then the unit is a big fat question mark.

I recommend not trusting such units as companies generally always send out review samples of any unit they feel is going to get a good review, and don't send them out if they know they are going to get hammered by the reviewer. No review usually equals poor quality. Usually.

Other models that should never be trusted OR USED AT ALL, under any circumstances, include A-Top, AK Power, Apevia, Apex (Supercase/Allied), Artic, Ace, Aerocool (There might be one model worth using, but I'd still avoid them.), Aspire (Turbocase), Atadc, Atrix, Broadway com corp, Chieftech, Circle, CIT, Coolmax, Deer, Diablotek, Dynapower, Dynex, Eagletech, Enlight, Eurotech, Evo labs, EZ cool, Feedtek, Foxconn, G7, HEC/Compucase Orion, HEDY, High power, iBall, iStar computer co., Jeantec, JPac, Just PC, Kolink, LC Power, Linkworld electronics, Logisys, Macron, MSI, NmediaPC, Norwood Micro (CompUSA), Okia, Powercool, Powmax, Pulsepower, Q-tec, Raidmax, RaveRocketfish, Segotep, SFC, Sharkoon, Shuttle, Skyhawk, Spire, Startech, Storm, Sumvision, Tesla, Trust, Ultra, Wintech, Winpower, Xilence (Until I see a reputable review of a model showing different), xTreme (Cyberpower), Youngbear and Zebronics.
 

Darkbreeze

Titan
Moderator
That is miles better than what you have now, so yes, that would at least be a very good step. Be prepared for the possibility that it is not the problem, but I'd bet heavily that it is. Even if it isn't, there's no way you're going to know really without eliminating that known problem of a very low quality unit first. Then, if you still have issues, we can go from there but it's a waste of time to even try when you already have a well known issue present in a power supply that undoubtedly is not capable of supporting the hardware.
 
Mar 10, 2019
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So the PSU arrived and I installed it, but the problem persisted and I don't know what to do anymore
Sometimes it shows some weird things about the bios but I can never access the bios to change anything
 

Darkbreeze

Titan
Moderator
Why can't you access the BIOS?

Try this, and make sure you know HOW to access the BIOS correctly for your motherboard. If you do, great, if you don't, do a little research on your motherboard and find out what key needs to be pressed and as soon as you power on the unit start spamming that key repeatedly until it enters the BIOS setup program. You usually can't just press it one time and expect to get in there. I'm assuming you do know how, but I have to mention that just in case.


Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for five minutes. During that five minutes, press the power button on the case for 30 seconds. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.
 

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