AMD R9 270X and Corsair CX430M PCIe Power Supply Question

Toggle sidebar Toggle sidebar
R

rattlehead2112

Honorable
Aug 18, 2013
136
0
10,710
Ok here's the deal.
The R9 270x consumes 142W of power in PEAK furmark 100% load.
It has 2 x 6 pin PCIe power connector / connection slots.
But the R9 270 (non X) consumes 138W on full load, and has only one PCIe power connector.
SOURCE: Toms

My Build:
Intel i5 4570
Gigabyte B85M
4GB x 2 G.Skill 1600
> Corsair CX 430 M <

MY QUESTION:
So, The power supply has only one 8 pin (6+2) PCIe power connector.
430W is sufficient for my build and I'm not looking to upgrade any time soon so I don't need any headroom extra watts)
The next model CX 500 M costs atleast $20 more where I live, I'm tight.
I need a modular PSU, I'm building on a mini tower.
After seeing the 270 (non x) I feel that I can buy a Y splitter to split the 8 pin to two 6 pins
( 1 x 8 pin to 2 x 6 pin)
Can I do this safely without causing damage to any of the components?
If there is any chance of risk involved, I'll have to get the cx500m.
I was also looking at Seasonic M12II 520W semi modular, looked very promising but out of budget, alteast by $40
 
Solution
ko888
1 x 8 pin to 2 x 6 pin Y splitter results in the same maximum power draw capacity.

8-pin PCI-E connector - 150 Watts maximum

6-pin PCI-E - 75 Watts maximum so two of these is 150 Watts maximum.

For a system using a single AMD Reference Design Radeon R9 270X graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

If you're looking for a PSU model with Haswell compatibility then make sure that the PSU manufacturer says that it is.
Sort by date Sort by votes
ingtar33

ingtar33

Glorious
Dec 17, 2012
9,017
198
45,840
most gpus come with 4pin molex to 6pin pcie power adaptor cords. they're both 12V cords, so they both should work. The issue is one of efficiency and the level of clean power you'll get from the adaptor. Generally they work fine, but the overclockers out here don't like them much.

short answer, yes, you'll be alright with an adapter.
 
Upvote 0 Downvote
Vic 40

Vic 40

Titan
Ambassador
Oct 22, 2013
20,885
994
87,990
Why not just buy the non "X " version? Well,that is if you don't want to use an adapter .

It's the same card just a clocked down version and it has only the need for one pcie psu cable.Looking at the reviews it does almost as good and overclockt it can achieve the results of a 270X.
 
Upvote 0 Downvote
R

rattlehead2112

Honorable
Aug 18, 2013
136
0
10,710


I already have the card :)
Actually all the reviews compare an aftermarket and overclocked 270 vs a reference 270x.

I have an MSI 270x which I think will overclock much better, maybe if I wouldn't split the PCIe cable right?
The PCIe x16 slot provides upto 75W of power and 1 x 6 pin provides another 75W if I am right?
So the r9 270 could take only upto 150W and it already takes 138W at full load without OC.
 
Upvote 0 Downvote
Vic 40

Vic 40

Titan
Ambassador
Oct 22, 2013
20,885
994
87,990



Which means not spliiting the pcie cable but using the molex->pcie adapter which most of the times comes with a gpu.Onle xfx often doesn't include one.It will work fine than.




You didn't put it in your build in the op so i assumed you still needed to buy it.
 
Upvote 0 Downvote
R

rattlehead2112

Honorable
Aug 18, 2013
136
0
10,710
59870.png


^ test setup for this is an Intel Core i7-4960X @ 4.2GHz

So I will have enough headroom to overclock even with the splitter on a CX 430 M right?
 
Upvote 0 Downvote
ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
1 x 8 pin to 2 x 6 pin Y splitter results in the same maximum power draw capacity.

8-pin PCI-E connector - 150 Watts maximum

6-pin PCI-E - 75 Watts maximum so two of these is 150 Watts maximum.

For a system using a single AMD Reference Design Radeon R9 270X graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

If you're looking for a PSU model with Haswell compatibility then make sure that the PSU manufacturer says that it is.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom