450W PSU 'will be fine for R9 270X 4GB?

adarc8 · Jul 8, 2017

hello my friend having i7 4790k with Recom Power Engine RC-450 Which i assume is having 450W...
atm he has no gpu, i want to buy him R9 270X.. it will be fine right?

Sakkura · Jul 8, 2017

A decent quality 450W power supply would be enough. But that one may be crap with a fake wattage.

4745454b · Jul 8, 2017

From what I've seen online, the Recom Power Engine RC-450 is made by Andyson. Not a manufacturer known for making quality PSUs. According to Guru3d the original model had 26A on the 12V rails, while realhardtechx has the second gen model having 30A on the 12V rail.

http://forums.guru3d.com/printthread.php?t=205763&pp=30
http://www.realhardtechx.com/index_archivos/Page24891.htm

The problem you are going to have is plugs. The second gen model only has a single 8pin plug. The Guru3d link doesn't have any pin info. The 270X going from memory needs two 6pin plugs. You might need to use adapters to get this to work, and I ALWAYS suggest never using adapters. Using an adapter to force a PSU to power something it wasn't designed to do isn't a good idea. In theory the second gen model can do it because a single 8pin plug can provide 150W which is the same amount of power as two 6pin plugs. The first gen model link is also from 2006 so it's super old. You shouldn't be using a 10+yo PSU.

To be honest I'd just toss that PSU and get a new one. Even a known good 80+ bronze unit can be hand ~$35.

adarc8 · Jul 8, 2017

4745454b :

From what I've seen online, the Recom Power Engine RC-450 is made by Andyson. Not a manufacturer known for making quality PSUs. According to Guru3d the original model had 26A on the 12V rails, while realhardtechx has the second gen model having 30A on the 12V rail.

http://forums.guru3d.com/printthread.php?t=205763&pp=30
http://www.realhardtechx.com/index_archivos/Page24891.htm

The problem you are going to have is plugs. The second gen model only has a single 8pin plug. The Guru3d link doesn't have any pin info. The 270X going from memory needs two 6pin plugs. You might need to use adapters to get this to work, and I ALWAYS suggest never using adapters. Using an adapter to force a PSU to power something it wasn't designed to do isn't a good idea. In theory the second gen model can do it because a single 8pin plug can provide 150W which is the same amount of power as two 6pin plugs. The first gen model link is also from 2006 so it's super old. You shouldn't be using a 10+yo PSU.

To be honest I'd just toss that PSU and get a new one. Even a known good 80+ bronze unit can be hand ~$35.

thank u for checking.. so basicly what u saying is check if its the first or second generation... how can i check this..?

4745454b · Jul 8, 2017

If you look at the label on your PSU, under where it says 12V it says 26A. So you have the first gen model. You can look and see if it has the plugs needed, but I'd guess you have one 6pin plug at most. My 450W PSUs has two 6+2pin plugs.

Sakkura · Jul 8, 2017

It has a 12V rail with 26A. That's 312W. So that makes it more like a 330-350W power supply in this day and age.

And that's if the rails are even honestly rated, which they might not be.

In addition to the fact that it's old, its capacitors may have deteriorated a lot, and it probably doesn't have the PCIe power connectors you need... that means it really needs to be upgraded.

adarc8 · Jul 8, 2017

4745454b :

Sakkura :

okay so can u suggest a gpu that can handle this psu..? the cpu is very strong its i7 4790k, and he needs to run csgo better than intel graphics

4745454b · Jul 8, 2017

Agreed. If it was the second gen model I'd probably risk it. It did come with an 8pin plug which provides the same power as two 6pin plugs. It's not totally out of line to try it with that one. A 10+yo model however that I'm guessing comes with only one 6pin plug if he's lucky isn't the best of ideas.

adarc8 · Jul 8, 2017

4745454b :

what about HD 6850.. ?

Sakkura · Jul 8, 2017

GTX 750 Ti, though it will be somewhat slower. Or GTX 1050 if you can afford it.

4745454b · Jul 8, 2017

Budget? Country? Are you replacing the PSU as well or just the best GPU that can run on that?

adarc8 · Jul 9, 2017

4745454b :

his budget is very low abotu 20-50 bucks and i live in Israel.. i told him to buy used gpu cause a new one will cost a lot...
we got offered AMD 6850 in 20 bucks.. will it run okay with this junky PSU? will it be okay for csgo? he has i7 4790k which has intel hd graphics 4600, ive sen that 6850 in 160% improvment from this 4600 intel graphics..

and no he wont replace the PSU, i know its a stupid dicision, and with monster cpu like that he should replace the PSU and buy at least 1060 GTX or something, but hes lazy as f..
so we are loooking for a cheap gpu .. what do u say?

Sakkura · Jul 9, 2017

The 6850 only uses slightly less power than the 270X. I wouldn't recommend it.

adarc8 · Jul 9, 2017

Sakkura :

okay so can u suggest card..?

Sakkura · Jul 9, 2017

A used GTX 750 Ti would be great.

4745454b · Jul 9, 2017

I thought the 270X was the 7870, which uses two 6pin plugs? The 6850 and 7850 should have only one 6pin plug. As long as he has a 6pin plug on his PSU he should be ok with the 6850 or 7850. 7850 being faster of course.

Sakkura · Jul 9, 2017

4745454b :

Those are the standard layouts, but each manufacturer can deviate from the standard. But I'm worried about the power consumption itself, not just the connectors. And the 6850 is very close to the power consumption of the 7870/270/270X.

4745454b · Jul 9, 2017

I know, but sometimes that 20-40W can make all the difference. I didn't see a review showing the internals of that PSU. A 120W GPU with a 77W CPU with another 50W for the rest of the system is only ~240-250W or so. A no power connector needed GPU would be even safer, but assuming that 450W PSU can output even half it's power then we are going over only by a little bit. I'd risk going over by 25W, I wouldn't risk going over by 50W+. I understand we are making a lot of assumptions here, but lacking better info I'm using my experience. The label didn't hide the info so I'm willing to cut them some slack. A 6850/7850 is possible, a 750TI sure. I doubt he can find one cheap enough however.

adarc8 · Jul 10, 2017

Sakkura :

4745454b :

guys the man whos selling me 6850 said it requires only one 6 pin connect.. sounds okay but im not sure what do u say?
and what do u say about the card itself.. will it show bettr performance in csgo instead of the onboard Intel Graphics 4600..?

4745454b · Jul 10, 2017

The 6850 should need only one six pin. It should perform better than the Intel 4600 as well. It does use more power than the 750TI, but it's an older card so that's no surprise. If the 6850 is the best you can do, then go for it. The 270X is faster, but it exceeds what the PSU can handle for sure. Are there any other options?

adarc8 · Sep 1, 2017

4745454b :

Mhm.. cab someone else confirm that

4745454b · Sep 1, 2017

cab someone else confirm that

http://www.anandtech.com/show/7503/the-amd-radeon-r9-270x-270-review-feat-asus-his

If you look at the chart the 270X is the same thing as the 7870. They have the same number of Stream processors, ROPs, texture units, etc. The core clocks are the same as well. The big differences are the memory clock, TDP (If you think 10W is a "big" difference), and the debut price. But they are the same card. The plugs needed will vary depending on the model. OC'd cards will need more power plugs. But even in the review I linked it needed two plugs.

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