Can I use a molex to 6 pin and molex to 8 pin to power a R9 280X ASUS DCUII TOP

Toggle sidebar Toggle sidebar
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530
So here's my PSU:
Nox 620W (pretty sure it has single 12v rail)
14-nox-gettinxtreme-nx620.jpg


And as you can see it only has 2x6pin and no 8pin connectors.
I heard that the 8pin deliveres 150W and the 6pin do 75, so I would need the 2 I have just to cover the 8pin requirement for the card, can I use a molex to adapter 6pin for the remaining slot, or do I need 2 molex to 6pin?
 
Sort by date Sort by votes
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
I never recommend Molex => PVCI-E adapters.

I would only use a 8 pin => (2) 6-pin if you could confirm that they are on separate rails if it's a multi-rail PSU.

The Antec 620 is an example of a single rail PSU, one which I would trust .... and it would appear that the Nox is single rail, or at least claims to be..... however, I'm bit leery in that it's 2 year warranty is kinda chinsy and the fact that they don't submit it for certification also makes me suspicious.

http://www.game-debate.com/psu/index.php?ps_id=621&psu=Nox%20NX%20620W
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


No no you misunderstood, what I planned on doing was:
-2x6pin to 6+2pin adapter (so 75+75 = 150) - to connect to the 6+2pin slot
-Molex to 6pin adapter - to connect to the 6pin slot

 
Upvote 0 Downvote
Rogue Leader

Rogue Leader

It's a trap!
Moderator
Dec 22, 2014
32,740
2,816
113,640


Oh ok, I am sorry, yes that would work. Thinking about it though I don't think they even sell a 2 6 pin to 8 pin, they have single 6 pin to 8 pin. a 6 pin can draw 8 pin levels of power with that adaptor. However I stand behind not powering a power hungry GPU with that PSU.

You're asking for trouble. The fact its missing those connectors is a huge red flag that they don't really expect someone to power a good GPU with it.
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


Was planning on getting this one:
http://www.pcdiga.com/2/16421/Adaptador-Alimentacao-PCI-e-2-x-6-Pin-p-8-Pin-Bulk
And this one:
http://www.pcdiga.com/2/5159/Adaptador-Alimentacao-2-x-Molex-p-PCI-e-6-Pin-Bulk

Thing is my other GPU broke, so I'm stuck with and old and slow laptop.
I don't have enough money for a new PSU.
I would eventually get a new one though to be safe

But wait, if a 6pin is enough to power an 8pin with the adapter, I don't even need the molex to 6pin since I have 2 6pin.
Basically what I mean is:
- use a 6pin to 6+2 adapter and connect it to the 6+2slot
- use the remaining 6 pin and connect it to the 6 pin slot.


 
Upvote 0 Downvote
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
1. You can use a 8 pin => 2 x 6 pin
2. A single 6 pin connector / cable should never have 150 watts of power going thru it.
3. While, "theortecally, two molex can power a 6 pin. I do not recommend molex connectors ever be used in any way, shape or form with PCI-E connectors.

Again, if you had an Antec HCG I would not be so concerned but the Nox is too much of a question mark. With no reviews, and no certifications, I certainly would not "push it".
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


Why do you not recommend molex connectors ever be used in any way, shape or form with PCI-E connectors?
And also, let's assume I went through with this, bought both adapter (2x6 to 6+2 and 2xmolex to 6pin), what's the worse that could happen? Is the risk towards the PSU (which is really irrelevant, since if it goes shit it means I would have to get a new one anyway) or can it damage other components?

Also is this PSU any good?
http://novoatalho.pt/ProductDetails.aspx?productid=28597
 
Upvote 0 Downvote
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
Because too many user builds have wound up on my workbench for repair after shorts / fires. Yes, the PSU can easily take down several components.

http://icrontic.com/discussion/92201/melted-molex-to-sata-cable-nearly-set-computer-on-fire

Many such instances are caused simply by not having the adapters pushed in all the way because they are cheaply made, tolerances are not that good and it's oft hard to get full seating. That's why I fail to see the attraction to 100% modular PSUs (beyond sleeving enthusiasts) because if the cables gotta be there no matter what, why introduce a failure point if ya can't leave the cable in the box no matter what. It also happens when a plug is not firmly seated in the MoBo. Every connection you add increases the possibility of such an occurence. And every person who experienced such a fire or damage said to themselves (or me when they brought it over to be fixed) "I made sure everything was properly connected".

http://ask.metafilter.com/124259/Burned-motherboard-power-connector-what-to-replace
 
Upvote 1 Downvote
Rogue Leader

Rogue Leader

It's a trap!
Moderator
Dec 22, 2014
32,740
2,816
113,640
Basically you are drawing a lot more power through connectors and wiring that is of poor quality on a poor quality PSU. Now I know what you're thinking all the wires are the same size! Yes they are however the PSU will be working double time to put out enough power to all those connections. A good psu, no big deal, a bad one at a minimum will fail. At worst it will take your Motherboard etc with it. Happens with cheap PSU's all the time.
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530
Crap...
So either I try this and risk breaking the rest of my pc or Ill have to wait 2 months to be able to use it again...
Will probably talk to the techies at the store at which I bought the PSU and am planning to buy the cables to ask how the warranty works in case it craps out.
Thanks for your help :)
 
Upvote 0 Downvote
Rogue Leader

Rogue Leader

It's a trap!
Moderator
Dec 22, 2014
32,740
2,816
113,640


Warranty will likely replace the PSU, however I don't see them (especially such a cheap PSU) offering coverage for parts it breaks when it goes out. I don't even think the good brands offer that.
 
Upvote 0 Downvote
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
How old is it ? Nox has 2 year warranty according to review I read.

Can you swap for a Asus DCII Strix (one 6 pin) ? or the MSI, one 8 pin ?

Here the MSI gaming is 12% slower than the 280x but the extra overclocking headroom on the 9xx series will eat haf that.
http://www.techpowerup.com/reviews/MSI/GTX_960_Gaming/29.html

Better yet, the Asus DCII 970 has just one 8 pin and that is about 50% faster than the 280x
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


Not really an option since I'm buying the GPU in second hand (for 150 euro, cheapest I could find with warranty)
I found a review for my PSU (although it's in spanish) and they actually say it's a really good PSU with good build quality, not sure how reputable this website is but the review looks pretty legit.
http://www.islabit.com/32836/review-psu-nox-gettinxtreme-nx620-620w.html
 
Upvote 0 Downvote
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
A good portion of web reviews are retyped press releases.

1. The fact that using yahoo / google to find a Nox review comes up pretty darn empty is worrisome. Usually, if ya got a good one, you are shipping them out to all the known web sites to get free publicity.

2. The fact that the PSU was not submitted for 80 plus certification is also worrisome. Just look on any large site like amazon or newegg and try and find PSUs that don't have the 80 plus certification in big letters at the top of the page. CWT as i recall is the OEM and tho CWT makes some excellent PSUs, they (like just about everyone else) also make some clunkers. I'm not saying it's bad, I am saying we have no way of knowing whether it is good or bad and the fact that it isn't certified or been submitted to the major sites for review makes me think Nox doesn't want us to know.
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


Ye, I perfectly understand what you're saying. Also couldn't find any reviews when I bought it, but (as always.. xD) was strapped for cash and it was on sale.

Thing is I posted the exact same question on anandtech and here's the reply I got:

"Your power supply has enough amps to power a single 280x graphics card without any issues. But get instead a similar 6 pin to 8 pin adapter to properly connect your card. I don't see any complication here."
 
Upvote 0 Downvote
D

DistortionGamer

Honorable
Dec 26, 2012
42
0
10,530


Okay yeah... xD
Is this true though?
"Your 6-pin PSU cable has actually three 12V wires (same as the 8-pin cable) capable of delivering >150w. Safely. Sure, the native 8-pin cable does support more current due to having an extra ground wire or two, but is it twice as capable? Not really. Point being, the wires won't be a limitation in your particular case unless you will be trying to break overclocking records and/or running Furmark day and night.W"
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom