Is my PSU can't handle my GPU? Help

GTHell · Jul 7, 2016

Got new GTS 250 and it require 2x 6 pin to power so I buy a new PSU about 20$ that has 1x 6 pin and 500w (Dtech DT 500). I use 1x 6 pin to molex to power the other socket on the GPU. The problem is the computer boot up then shut down and then it boot up again with no responce to screen.

I though that it's the card problem so I take it back to test and it working perfect with their system which has 2x 6 pin pci-e connector.

So, Is this a problem with my PSU or motherboard? Other card that doesn't require 6 pins work perfect though.

I feel like wasting 23$ for nothing. This GTS 250 is sparkles brand and I don't know that it's this power hungry. I won't even boot without 6 pin connector, Unlike other card I see which boot up but ask you to upgrade PSU.

Thank for help.

Martell1977 · Jul 7, 2016

If the PSU was 20$, the odds are it is a fire hazard and pathetic quality. It probably lacks in every way needed for the card. There is a reason some PSU's are $100 and others around 20.

Using the molex to 6-pin is not a good idea to begin with and considering that the PSU came with a single connector should have been a sign that the PSU couldn't handle it.

The PSU is the heart of the computer and should never be skimped on, if it goes, it can take the entire computer with it.

Here is a good reference of what brands and models are found to be of good quality:
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

GTHell · Jul 7, 2016

Will get new PSU fix this problem? The seller of this GPU recommended a 40$ genuine brand to me but I refused and got this 20$ from other store and now I'm going to waste 60$ total.

Can you make it clear that this's a PSU problem? I don't want to buy new PSU then find out that it's the motherboard or other part of the computer that causing a problem.

And one more question? Why the PSU label 500w when it fail to do its job? Also it say that this PSU fit perfectly for a card that require a 6 pin connector. And this card only need extra 1.

Martell1977 · Jul 7, 2016

Basically, they use funny math to get the 500w, but because of the poor quality, if it ever got near the 500w, it would likely burn up. The GPU needs more than just wattage, there is also the Amps on the +12 rail, among other things. If the PSU were of decent quality, then 500w would be more than enough.

They call it a 500w because that's how they want to sell it. There are a lot of PSU's out there with varying wattage that could never output what they are labeled as. They sell enough PSU's that they don't care what happens once you have it. The odds are that someone that buys such a PSU wouldn't likely know it was the PSU that damaged the system. I am surprised that it has any 6-pin connectors.

I can't guarantee that it will solve all your issues, but it will eliminate an existing one. Was there a different card in that slot of the motherboard? What happened to it? If this is an upgrade, then it's the PSU. If the other card died, we will need more info about what was in there and happened to it.

Either way, that PSU is not safe and you could lose the whole system when it goes bad.

GTHell · Jul 7, 2016

This is an upgrade from Geforce 210. I found this GTS 250 for 20$ and tested it with 3d benchmark and it passed without crashing. I don't want to take my machine to the seller's place so that why I want to really make it clear that it's my PSU fault.

I have tested this card on other pc that use cheap chinese PSU with no 6 pin connect and it won't boot up the also(It boot but use intergrated GPU). And bring it back to seller to test on a different system and it boot. He use 600w brand psu with 2x 6 pin connector. After reading your answer I feel safe to buy a new PSU from him since it look like that it's a PSU problem that can't handle the card at all.

Additionally, I just take a box of this 20$ psu and read the back of it. It's probably 250w with some lame math calculation to say that it's 500w.On its back It's label in a row of table saying that 250w psu have 1x 6 pin and 350w psu has 1x 6 pin and 500w psu has 2x 6 pin. While the front of the box putting 500w output. This is probably a false advertising to trick people into buying their product. After writing all of this I think that the reason it wont boot up because it's not 500w. Probably 250-300w PSU with fake number on the front.

One more question before I put this to solved. Will GTX 750 ti work with this PSU since there is a report that it work with 250w PSU? In october I will get GTX 750 ti or maybe GTX 950. This PSU look fancy with its cable and stuff except with its fault advertising. I'm sure it's 250-300w PSU.

Martell1977 · Jul 7, 2016

I doubt it, but even if it could, the build quality is low and would be a risk. It's best to just get a better quality unit and you can reduce the risk of damage by a lot.

Unless price is a factor, there is no good reason to get the 750ti over the 950. Plus, with the new cards coming out, like the RX 460 with MSRP of $99 and large performance increases over previous gen cards, I would look at those first.

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Is my PSU can't handle my GPU? Help

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