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GTX 770 4GB Review and Benchmarks? And Gigabyte 780 Windforce - Page 4

post #31 of 74
Quote:
Originally Posted by malmental View Post

I have to see the benches first..

I'm not convinced the GTX 770 can push 4GB of VRAM as the GTX 680 couldn't.
is that all possible now because of the 6K to now 7K memory speeds for the GTX 770.?
it took Tri-SLi in Widescreen Surround (5760 x 1080p) or similar for the 680's to push into 4GB VRAM territory and then that's a waste.

maybe the better performing GTX 770 can do it in just SLi and not need Tri.
I hope so but just have my doubts..

Here's a bench showing that the bandwidth limit on the 680 was around 3.5 GB.

Making some assumptions on how VRAM bandwidth works, you can assume that a card needs to be able to read the memory every frame, which, with the GTX 670/680's 192 GB/s bandwidth, comes out to 3.2 GB @ 60 Hz. With the 770's 224 GB/s, it comes out to 3.7 GB/s, and it's not much of an overclock to make it to 240 GB/s, where you would supposedly be capable of utilizing 4 GB. I should do some testing to try to back this up, of course, but it seems to make sense, especially with the data from that HardForum thread. Debunked. After doing some testing, it doesn't seem like this calculation is accurate. I can run my GTX 560 down at 64.2 GB/s, and still get an average FPS in Counter Strike: Source of 314 fps, with a max of 572, with 483 MB of VRAM being used. By my calculation, this should require at least 151.7 GB/s. I'm not sure how memory bandwidth limits the VRAM utilization capabilities of a graphics card.

Nonetheless, that Hard Forum thread shows that all GK104 cards are capable of utilizing at least 3 GB, meaning that you shouldn't worry about memory bandwidth bottlenecks on a GTX 770.
Quote:
Originally Posted by Gripen90 View Post

I know that ! the 256bit rambus is backed up with more processing power. Bandwidth in that sense may not be the correct term I agree with that, but with 3 card you have extra bandwidth and memory bus to handle things like Anti-Aliasing and other image quality enhancement setting at a much higher level.
Also remember memory used/allocated is not the same as memory required ! programs as MSI Afterburner and EVGA Precision only show memory used/allocated ! not what it's actually needed.

HardOCP had a reivew from january with GTX 670 4GB cards at 5760x1200 where they compare to 2GB versions.
http://www.hardocp.com/article/2013/01/14/asus_geforce_gtx_670_directcu_ii_4gb_sli_review/9#.UcmNd73GDWR

Relax ! I'm only giving a word of advice ! normally every year we get a 30% performance increase for the same money - but this year we obviously do not ! that's why I'd personally recommend to see if not Maxwell will change that. The new GTX 760/780 is just GTX 670/680 all over - one year ago !. Only thing new is GTX 780 and Titan but so a significantly different price.
As shown with the thread I just posted above, memory bandwidth does not increase with more cards. However, you do get more GPU power with more cards, so you would be able to run settings like AA that use up a lot of VRAM while still getting high FPS, that's true.

Yeah, Nvidia has been using a release cycle kind of similar to Intel's "tick-tock" cycle for a few generations now. The new 700 cards are still Kepler, like how the 500 cards were Fermi. You probably would see a bigger performance boost with 700->800 than we've seen with 600->700, but it's still pretty silly to wait 2 years when the new cards just came out.
Edited by DoctorWorm - 6/26/13 at 5:02am
post #32 of 74
Thread Starter 
Quote:
Originally Posted by Ishinomori View Post

I'm also looking to SLI 760's straight up, and back off AA to stop myself hitting the 2gb frame buffer.

EVGA have the reference cards that might be the go.

It's certainly tempting but I have mixed feelings on them. At 1920x1080, they usually only outperform the 780/Titan by 20-30 FPS and leave no upgrade path whereas a single 780 is only $130 more, offers similar performance, and a much easier upgrade. The benchmarks I read through for 770/760 SLI at 2560x1600 and 5760x1080 made their 2GB VRAM limitations VERY evident. lol They weren't even able to break 10 fps on the more demanding games whereas the 780/Titan could hold a steady 40+ fps, in most cases.

I've never had such a hard time deciding on a part for my computer before. frown.gif lol
post #33 of 74
Melee,

I feel your pain. My GTX470 is going through RMA at the moment so I am also running off my 3770k iGPU (thank jeebus it has it).
I am in the same boat you are now. I am pretty positive though that I will be getting a 780 though.

My 470 runs all my games just fine, so a 780 will demolish everything, and I expect it to be very competitive through the next few generations of cards.

A 770 or 680 would make more sense price wise, but I think I'd rather just front the cost of a 780 now and be done with it, and in a position to go SLI in the future.
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post #34 of 74
Thread Starter 
Indeed, my friend, it's a tough choice.

The 780 is a beast but I wish it was more in the $550-$600 range. It's just complicating to know I can get better performance on my current monitor for $150 less. However, it provides the best and simplest upgrade path.

The 760s are attractive because of their price. However, they won't be able to do anything at higher than 1920x1080 which is a big turnoff since I would, no doubt, have to sell them to upgrade in the future.

770 SLI is still a big option for me. I know that 770 2GB SLI will decimate everything at 1080P but it runs into the same issues as the 760 at higher resolutions. The 4GB 770s are there, of course, but still yet to see any benchmarks on them and at $900 for two, it would really have to make a difference.

Honestly, right now I'm leaning more toward building a Mini-Itx powerhouse with a single 780 that will be great for my current needs and in a few months or so when I get the extra funds for another one, I can just upgrade to an ATX or Micro-ATX build. Or, I wonder if a 790, assuming they release one, would work in a Mini-Itx build w/ a Bitfenix Prodigy. thinking.gif

This process, along with choosing memory, has been nothing but a giant headache. lol
post #35 of 74
well if you want a short term that you know will need to be upgraded later, why not just get the cheapest option you can and run SLI 670's?
That is why I have my sights on a 780, no fussing around later to upgrade and still have plenty of performance.

You need the SLI 770's to drive a single monitor to the same, and a bit better, than a single 780.
But if you go multi monitor you may need higher VRAM which a 780 offers.
So if you go 770 SLI now you risk spending the same or more money on 780's later.
In either case if you stay with a single monitor either option is the correct option.
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post #36 of 74
Thread Starter 
Honestly, if I could find 670s or 680s for a decent price, I would strongly consider it. However, I'm not paying more for 1-1.5 year old used cards than brand new cards that outperform them. mad.gif lol
post #37 of 74
Quote:
Originally Posted by Melee View Post

Honestly, if I could find 670s or 680s for a decent price, I would strongly consider it. However, I'm not paying more for 1-1.5 year old used cards than brand new cards that outperform them. mad.gif lol
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post #38 of 74
Quote:
Originally Posted by Melee View Post

Quote:
Originally Posted by Ishinomori View Post

I'm also looking to SLI 760's straight up, and back off AA to stop myself hitting the 2gb frame buffer.

EVGA have the reference cards that might be the go.

It's certainly tempting but I have mixed feelings on them. At 1920x1080, they usually only outperform the 780/Titan by 20-30 FPS and leave no upgrade path whereas a single 780 is only $130 more, offers similar performance, and a much easier upgrade. The benchmarks I read through for 770/760 SLI at 2560x1600 and 5760x1080 made their 2GB VRAM limitations VERY evident. lol They weren't even able to break 10 fps on the more demanding games whereas the 780/Titan could hold a steady 40+ fps, in most cases.

I've never had such a hard time deciding on a part for my computer before. frown.gif lol

do you have a link to the review?

Im in two minds here (Australia), its $340 for a 760, $650 for a classy 4gb (I know there are still ftw/sc/ref 4gb models on the way) and $820 for a acx 780sc (all evga so far)

Decisions decisions.

I was forced into 560ti because I needed two cards to run triplewide resolutions, but not that triplewide can be run off one card, I could chose a 780 to do it. Problem is 580's were about $600 when they were first released here... :-/
post #39 of 74
Thread Starter 
Here are a few reviews that show the 760 SLI Performance:

(They seem to struggle most with BF3. The Minimum FPS is 2 and there are HUGE curves in the graph. In other games, they are neck and neck with the 7950.)

http://www.hardwareheaven.com/reviews/1782/pg13/nvidia-geforce-gtx-760-graphics-card-review-gainward-palit-and-zotac-5760x1080-gaming.html

(This review goes a lot more in depth with many more games. In FC3 w/ Max Settings, both the 760 and 770 SLI had a min fps of 9 at 5760x1080p. In Metro Last Light, 760 SLI actually LOSES to a single 780 OC or Titan at all resolutions.)

http://www.legitreviews.com/article/2224/8/

(Here is another where it loses to a single Titan at 2560x1440 and only beats a 7970 by 1 frame. I'm honestly not sure what to make of them. The performance seems so chaotic and varied.)

http://www.guru3d.com/articles_pages/geforce_gtx_760_sli_review,12.html
post #40 of 74
Ya remember the 780 and the 770/760 are two different types of cards. So seeing a 780 have better performance than SLI 760's isn't totally unexpected.
Cards are still new though so drivers should continue to show improvements. They still are with the 6xx cards.
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