780ti or 970?

Guille_arg

n00b
Joined
Mar 7, 2013
Messages
30
I have this configuration
*Intel I7 4790k 4.0Ghz
*Asus ROG Maximus Impact z97 mITX
*Gskill Trident X 16gb DRR3 2400Mhz
*SSD Samsung EVO 250gb
*Sshd Seagate 2tb
*EVGA Hadron Air / EVGA 500w Gold

Will runs better with a 780ti or a 970? They cost almost the same price. But I can't decide which are the best choice!
 

Daniel_Chang

[H]ard|Gawd
Joined
Jan 4, 2016
Messages
1,313
With that 500w PSU, I'd definitely go with a 970.

This is a misconception. Any of those cards will run fine on a quality 500W PSU. The average person grossly overestimates their system's power draw. If he had the R9 390, he could MAYBE push 400W under full load.
 

mrluckypants96

Limp Gawd
Joined
Oct 6, 2015
Messages
431
This is a misconception. Any of those cards will run fine on a quality 500W PSU. The average person grossly overestimates their system's power draw. If he had the R9 390, he could MAYBE push 400W under full load.

A misconception perpetuated by overly cautious internet power draw calculators.
 

Adidas4275

Supreme [H]ardness
Joined
Mar 11, 2006
Messages
5,986
so a cheap 500w is a no go.... but a good one... with out a 3930k OCed or something
 

Daniel_Chang

[H]ard|Gawd
Joined
Jan 4, 2016
Messages
1,313
so a cheap 500w is a no go.... but a good one... with out a 3930k OCed or something

Basically, the reason why Nvidia and AMD recommend high wattage PSUs is due to the way that different vendors treat the 12V rail, which is used to power both the CPU and GPU in modern systems. Here's two examples:

EVGA G2-550
Rated at 550W @ 50°C. However, can output up to 549.6W over the 12V rail. This means that it has the flexibility to handle a powerful CPU/GPU.

And then there's this piece of garbage:
LOGISYS Computer PS550E12 550W ATX12V Power Supply - Newegg.com
This thing is advertised as being able to handle 300W over the 12V rails (though I doubt it could handle that).

Both of those PSUs are rated as 550W, but the way that they handle the 12V rail is completely different. Assuming that both do exactly as advertised, the Logisys can handle an i7 + GTX 970 with minimal overclocking. The EVGA could handle the 970, 780ti, and R9 390 with a fair amount of overclocking.

That's what I mean about a quality power supply. The reason companies recommend more wattage than you need is because so many people cheap out on a PSU and get garbage like that Logisys.
 

PontiacGTX

Gawd
Joined
Aug 9, 2013
Messages
789
if it is using a quality 500w psu the best choice is a r9 390...
Power_02.png
 

Dayaks

[H]F Junkie
Joined
Feb 22, 2012
Messages
8,964
if it is using a quality 500w psu the best choice is a r9 390...

Honestly it's 20 watts... That's pretty much negligible (shouldn't be a factor.)

I'd go with whichever card is cheaper and has the more applicable bundle. Probably be the 390.
 

PontiacGTX

Gawd
Joined
Aug 9, 2013
Messages
789
Honestly it's 20 watts... That's pretty much negligible (shouldn't be a factor.)

I'd go with whichever card is cheaper and has the more applicable bundle. Probably be the 390.
that highly dependent on the game but in average some games use less power than other like DX12 games use more hardware in parrallel(Asynchronous compute)
 
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