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post #11 of 19
If price/performance ratio is not a concern, then I recommend getting a GTX 780 and overclocking it to the maximum. And since you mentioned 780 in the first post, I'm assuming that it is within your budget.

It is not true that a 780 offers a small performance gain over a 770, especially when the 780 is overclocked. Here is the highest Valley score with an overclocked 780 classified. The highest score for a 770 is 58.7FPS as opposed to the 84.5FPS of a 780. Check here for more comparisons.

As for games, with my Titan at 1150MHz I have to "lower" my settings to the following to keep at/around 60FPS. I play at 1080p.
Crysis 3 : AA - 2x MSAA; Other settings : Maximum
Metro Last Light : AA - 2x SSAA; Other settings : Maximum
Grid 2 : AA : 8x MSAA; Other settings : Maximum (vSync locked at 60FPS at all times)

780s are at most 5-10% slower than a Titan at the same clocks, but overclocks higher than Titans with comparatively lesser trouble since they require lesser power and produce lesser heat. Besides, 780s have non-ref editions like the Classified which not only offer better power limits and cooling solutions but also come with extended overvolting capabilities to 1.35v as opposed to the 1.212v of other Kepler cards.

As for AMD's solutions, the 7970/7950 are two of the best bang for buck cards out there, but the 780 is significantly faster (~30%+). I wouldn't plan on going for AMD's multi-GPU solutions until the CF fix drivers have been proven to completely get rid of all the issues.

If the cards aren't too expensive in the UK, I'd strongly recommend getting an EVGA 780 Classified and overclocking it to its max. Its very much sufficient for 1200p for current titles and its 3GB VRAM will be slightly more future-proof than the 2GB of a 770. Although if you are considering a 770 then you might as well get a 7970 for cheaper and get the same performance along with an extra GB of VRAM.

Hope this helps! thumb.gif
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post #12 of 19
Thread Starter 
The Price to performance of a GPU isn't really important to me, i'm just looking for a card that will give a good upgrade over my existing setup while being relatively future proof.

Most of the 780's on sale in the UK appear to be of the reference design such as this one - http://www.ebuyer.com/508004-msi-gtx-780-3gb-gddr5-6008mhz-dual-dvi-hdmi-displayport-pci-e-graphics-card-n780-3gd5

Non reference cards such as the EVGA GTX 780 Superclocked ACX cost quite a bit more and would be out of my budget (max £520) - http://www.amazon.co.uk/EVGA-GeForce-Superclocked-Graphics-2560x1600/dp/B00CYIQ00K/ref=sr_1_7?ie=UTF8&qid=1374772265&sr=8-7&keywords=GTX+780
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post #13 of 19
I looked up the highest (and also the only) 6950 CF Valley score in the Valley thread. It scored 61.5FPS as opposed to the 84.5FPS score of a GTX 780 I showed you earlier.

Now considering the fact that you probably won't be getting anything non-reference, lets consider an average score of 80FPS for 780s. Even then, its an almost ~33% increase in performance from the 61.5FPS of the 6950 CF. Plus you get the extra GB of VRAM with the 780.

To make an even fairer comparison, you can download Unigine Valley and run it on your system to see how high you can score and then calculate the increase if you make the jump to a 780.

As for reference vs non-reference cards, the ref cards are only ahead in aesthetics, and they have a blower type cooler if that is your thing. Other than that, the non-ref editions provide better cooling, a higher power limit (which is of utmost importance for overclocking GK110 cards) and higher overclockability. So with a reference edition card you may not be able to reach as high an overclock as non-ref ones but you'll still get a sizeable difference in performance. Head over to the GTX 780 owners' club and ask for further information. I'm here to help you but they'll probably be able to help you more regarding any question that you might have about the 780s.

As for future-proofing, a 780 with its 3GB of VRAM is all the sane amount of future-proofing you can get right now. Although no one can tell what changes the new console ports will bring to the table for current hardware, a 780 with its 3GB VRAM will stand a better chance with those games should a drastic change occur. Also, since you're sticking to a single GPU setup for now, you can always add another 780 to your system should you feel the need for more performance.

Reference 780s are all the same (like Titans) if I'm not wrong. So you should be fine getting the cheapest one you can find, regardless of the vendor.

For further comparisons in performance especially in games, check out some of the GTX 780 reviews.

Good luck! thumb.gif
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post #14 of 19
Uniengine valley is optimizied for Nvidia not amd cards, As a matter of fact on a diffrent test Furmark burn-in text my crossfired 6970s beat your wonderful gtx 780 by at least 10 fps! I would say keep your crossfired 6950s and find the sweet spot for them you will get higher FPS then a 780 gets! I love how they only use tests they know they win at, why dont you go do a run on furmark with your 6950s I bet you you will leave the 780 in the dust, those cards arent that nog of a deal I dont know why people are making such a big fuss over them-My opinion at least.Good luck with your purchase
     
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post #15 of 19
Thread Starter 
I've just ran Furmark and Unigine Valley. The results are shown below.

Furmark


Unigine Valley
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post #16 of 19
Quote:
Originally Posted by Kieran View Post

I've just ran Furmark and Unigine Valley. The results are shown below.

Furmark Warning: Spoiler! (Click to show)

Unigine Valley Warning: Spoiler! (Click to show)

my 7970 got a 52 in furmark at stock and my oc'ed 7950 got a 51.2 in valley.
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post #17 of 19

.......... Iam not trying to downplay the gtx 780 in any way shape or form but all i was saying is in RAW fps I beat it with my crossfired 6970s! The 780 is obviously the better card but again the Results speak for themselfs:D



Edited by nz3777 - 8/1/13 at 9:42am
     
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post #18 of 19
I recently upgraded my HD5870+5970 triple crossfire to 2xTitan SLI. When I was considering the upgrade, my general idea was that in terms of raw gpu power, HD5870+HD5970 matched one Titan. I reached to this conclusion after examining many benchmarks on the net. Thus I figured that two Titans should give me about 60-80% increase in terms of gpu power above 5870/5970 setup, assuming that the efficiency of SLI was 60-80%. After I upgraded the display from 1080p to 1440p, I really needed to increase vRAM from 1GB to at least 3GB. At the same time the pixel number increases about 77% from 1080p to 1440p, which indicated that the games will run almost the same in terms of raw gpu power between 5870/5970 setup at 1080p and two Titans at 1440p. From this reasoning I upgraded from 5870/5970 to two Titans and am very happy about this new setup now. Simply the difference was almost night and day.

I think that two HD6970 crossfire is similar to HD5870/5970 in terms of raw gpu power. The main difference is vRAM size (1GB vs. 2GB). In my opinions you need two gtx780s to feel real upgrade over your current setup.

Also you need to keep it in mind that ATI crossfire had not been working appropriately due to frame time issues. Therefore your 2xHD6970 might show benchmark score as good as one gtx780. But in reality the crossfire might have not worked appropriately in the gaming. ATI issued a new driver which addressed frame time issues for the first time this month. You could try playing games with a new driver to see how it improves your gaming experiences. Unlike my HD5870/5970, HD6950/70 has 2GB vRAM. If you are comfortable with playing games with the new frame time driver, you could keep your setup for a while considering that your setup matched gtx780 in terms of raw gpu power. (note: I feel that frame time issues were one of the major problems of my old 5870/5970 setup. The upgrade to two Titans probably did far more than 70% increase in gpu power in reality).
post #19 of 19
You have a solid point!................ Iam still not sure if ill be keeping these crossfired 6970s or upgrading to something else, for now they are doing quite well for me thats all i can really say.
     
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