Looking to buy 390 or 390x, need help w power requirements.

G

grendel240sx

Limp Gawd
Joined
Sep 30, 2004
Messages
497
Hi guys,

I'm thinking of upgrading my vid card. I'm looking at the AMD 390 or AMD 390x.

Currently I have:

i5 2500k LGA1155
16 GB DDR3
Optical - DVDRW
SSD hard drive

Cooler Master Silent Pro M2 - 720W Power Supply

I plug that into the newegg calculator and it says I require 589w

So now I check for the 390 cards...

Same stats above w/ 390 = 689W
Same stats above w/ 390x = 759W


How accurate is this newegg calculator? If I remove my optical drive from the list, the 390x loadout comes to 730W


Any chance I could run a 390x? Is the 390x that big of a jump from the regular 390?
 
I've been told that you can OC a 390 to deliver 390x performance, so may want to do it that way.
 
Sounds good, I posted on Reddit and the two guys I was talking to seemed to also lean towards the non-x 390
 
And the same way you can OC the R9 390, you can OC the R390X and still receive extra performance.. with that system I think you will be fine with a good quality 550W-600W Power supply, Fortunately the PSU you have it's top notch, CM Silent Pro M2 series are in my opinion one of the best quality ever made. even if its says Bronze, it match and surpass most of the actually GOLD PSUs... You will be fine with that PSU for any card in the market even with a high OC'd 390X.
 
XFX it's a great choice, you will not find any other AIB Partner with such amazing Support... they redesigned the cooler and now have one of the best cooled VRMs for those cards so it's a solid choice.
 
Thanks for the info everyone, I went with an XFX 390.. hope it does well for me :)

Will hold me over until I upgrade the whole rig next year I think.
 
XFX & BB have some kind of deal where you can still get lifetime warranty on XFX products from their store. Make sure you register it.
 
That power supply calculator has to be wildly inaccurate. Theres no way a 2500K and those video cards would use that much power. (unless you have some monster overclocks, with equally crazy ways to cool everything). You'll be fine with your PSU. Enjoy the new card!
 
JS_ said:
That power supply calculator has to be wildly inaccurate. Theres no way a 2500K and those video cards would use that much power. (unless you have some monster overclocks, with equally crazy ways to cool everything). You'll be fine with your PSU. Enjoy the new card!
Click to expand...

You mean monster clocks which are not doable with conventional cooling methods :D

My 2600K @ 5.4Ghz and 290X @ 1320 / 1600Mhz pulled around 650w from the wall which still means around 580w real usage with 90% efficiency rating. And lets be honest, those are monster clocks which were somewhat doable with almost 0 deg. C water.

To OP: Here's the one PSU calculator which is somewhat accurate, but still shows a little too high wattage ratings imo. You can even input overclocks there: http://outervision.com/power-supply-calculator
 
grendel240sx said:
Hi guys,

I'm thinking of upgrading my vid card. I'm looking at the AMD 390 or AMD 390x.

Currently I have:

i5 2500k LGA1155
16 GB DDR3
Optical - DVDRW
SSD hard drive

Cooler Master Silent Pro M2 - 720W Power Supply

I plug that into the newegg calculator and it says I require 589w

So now I check for the 390 cards...

Same stats above w/ 390 = 689W
Same stats above w/ 390x = 759W
Click to expand...

I plugged that into http://powersupplycalculator.net/ and even overclocked at 4.6Ghz I came up with 274W PSU req. Add six 120mm fans and it went to 298W PSU. Added a 290X and it went to 597W PSU req, 478W max draw.

I'm not saying this site is 100% accurate, but Newegg's calculator is out to lunch on this one. The card you got will work fine with that system.
 
There is no way a 390X and 2500K will be able to pull over 720W without resorting to extreme cooling methods that were never intended for 24/7 use. So yeah a 720W PSU will more than handle a 2500K and 390X overclocked to the hilt on air/water.
 
I am seeing loaded power draw of about 400W with a R9 290X OC.

Rig:
FX 8370e OC
16 GB RAM
R9 290X OC
500GB SSD

So yeah, those figures from Newegg seem very high.
 
It's almost like Newegg is trying to encourage you to buy a large and expensive PSU. :)
 
No way you'll get 760W from a SINGLE 390X, on Crossfire, for sure. But on a single card it's 100% bull.

I own a 390X G1 Gaming and i'm really pleased with it. Performance-wise it eats everything (will do so in the future having 8 gigs), and the temps are better than 970 ssc acx 2.0+ (owned 2 of them in sli and both had 77-78 degrees in BF4) whereas the 390X has a max of 72. I would go for 390X
 
I have a 2500k running at 4950mhz and a 290x (with a bios mod from a 290) and I pull around 580w from the wall. The 290x is hitting 1150mhz core. The psu is bronze and delivers 620w.
 
When I got to the store, they had a 980GTX sitting on the shelf. The online inventory didn't show that one. I ended up paying more (prob overpaid but I wanted it that day) and got the nvidia. I'm liking it so far. I had SLI nvidia cards way way back, then went to crossfire ATI and now I'm using a single nvidia.
 
I think 550w is what you will need.
a 500w PSU or even a 450w high quality PSU is sufficient for non oced chips + r9 290.
[from my personal experience]
Adding a few watts for your CPU + 390, i suggest 550w-600w. anything above 650w is going to be significant overkill / waste of your $
 
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