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7970 Ghz Vapor-x PSU questions

Last response: in Graphics & Displays
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May 25, 2013 5:49:57 PM

Hey guys, I am looking into getting one of those to upgrade my system, unfortunately, I started with everything else but the PSU which is now 500 Plus Sirtec.
My current specs are
I5 3470
Corsair Vengeance 8GB 1600
Just one hdd for the moment in process of upgrading
Western Digital 1tg sata 3
So the main questions is, can I run with the 7970 ghz?
Or at least for a month or so before I upgrade the PSU? No OC in mind.

Or should I go with a Gtx 670 MSI or Asus DC II, since they don't require that much power?
Every opinion is very much appreciated ^_^
May 25, 2013 8:27:51 PM

500 watts is like the miniest minimum requirement for a 7970

I use a 750 watt corsair

CX750 Corsair

Its a $100 on the website with eggs
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a b U Graphics card
May 26, 2013 1:21:21 AM

well, a 500W 80+ rated PSU with one 6+2 Pin and one 6 Pin should do the job, but i think that when buying a PSU, get one with atleast 100W more so as to allow more headroom for additional parts, eg. the 7970 is listed as 500W recommended, but taking into account if you overclock the GPU and CPU, it would be safer to go with a little bit more power, say a 600W or a 650W unit. so Get a Seasonic or Corsair 600w 80+ bronze certified unit

Corsair TX 650V2 (non modular) @ $89.99 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Seasonic M12II 620 (Semi modular) @ $89.99 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

As for the MSI or ASUS 670s, if it were me, id get the 670 instead of the 7970, yes, the 7970 may be more powerful in terms of raw power, but it uses more power, generally runs hotter and is louder, and then there's the new nvidia dirvers, should add more performance to the 6xx series.

Note: I checked your PSU "Sirtec High Power Plus 500W", it should be able to power the 7970 Ghz, it comes with 2x 6+2Pin PCIe connectors and is rated at 40A (20A+20A) across 2x 12v Rails. But I still recommend getting a better unit from Seasonic/Corsair/Rosewill etc. who are renowned for making high quality PSUs

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May 26, 2013 1:41:19 AM

No need to be paranoid and use a 750W PSU with a single graphics card unless you are purchasing the PSU for the first time and not already own one.

The 7970 has a max TDP of 250 W and the I5 3470 CPU's max TDP is 77 W, if you do not overclock for now (or even if you did a little) your max TDP for your most power hungry components in the system is 327 W, and that is the MAXIMUM it would reach which happens only if you are Torture Testing these components and is not likely under normal conditions nor does it require this 327 W on a 24/7 basis .. so you would still have some headroom for the rest of your components which you say you don't have much of.

Now this situation is of course not optimal but your question was "can I run with the 7970 ghz?" and your answer is YES, you can technically run with that PSU for a while until you can afford a better one if you ever feel you want to get another PSU indeed after experiencing how your computer runs with the one you already have.

I would definitely not go with a 670 card over a 7970Ghz card because i have the illusion that i can not power the later with the PSU i have, because the difference in performance between the two of them is significant, and the 7970 comes with some yummy game titles :) 

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a b U Graphics card
May 26, 2013 4:00:58 AM

MyNewRig said:

I would definitely not go with a 670 card over a 7970Ghz card because i have the illusion that i can not power the later with the PSU i have, because the difference in performance between the two of them is significant, and the 7970 comes with some yummy game titles :) 



the 7970Ghz is faster, but not significant, 5-6% only faster (Which i dont think is a significant difference)
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May 26, 2013 5:07:40 AM

No it is significant, specially at higher resolutions up to 4K and in some titles, the difference is day and night, the 7970Ghz has 3GB vRAM while the 670 has 2GB vRAM which is a huge difference if he will ever run 3 monitors setup. also the 7970Ghz comes with 4 games while the 670 comes with one or none.

Now to sacrifies all these benefits just to get a card that would use 20-30 Watts less power is out of the question, specially when his PSU can run the 7970Ghz just fine and even within its official recommended system requirements.

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May 27, 2013 11:39:02 AM

Thanks for the advices guys, that will do I'll get the 7970 Ghz, and I was more inclined for this more for the investment of it all, now that I know that the Sirtec will be good for at least one month, that's the end of it.
The choice for 670 was that I have this offer where both cards are the exact price, 7970 with an offer, the price being a 2-3$ difference, anywho May go bless you with 90% discount to the new 780.
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