NVIDIA GeForce GTX 780 Review: The New High End
by Ryan Smith on May 23, 2013 9:00 AM ESTMeet The GeForce GTX 780
As we previously mentioned, the GTX 780 is very much a Titan Mini in a number of ways. This goes for not only the architecture, features, and performance, but as it turns out it will be the case for the design too. For the reference GTX 780 NVIDIA will be straight-up reusing the GTX Titan’s board design, from the PCB to the cooler, and everything in between.
As a result the reference GTX 780 inherits all of the great things about the GTX Titan’s design. We won’t go into significant detail here – please read our GTX Titan review for a full breakdown and analysis of Titan’s design – but in summary this means we’re looking at a very well built blower design almost entirely constructed out of metal. GTX 780 is a 10.5” long card composed of a cast aluminum housing, a nickel-tipped heatsink, an aluminum baseplate, and a vapor chamber providing heat transfer between the GPU and the heatsink. The end result is that the reference GTX 780 like Titan before it is an extremely quiet card despite the fact that it’s a 250W blower design, while it also maintains the solid feel and eye-catching design of GTX Titan.
Drilling down, the PCB is also a re-use from Titan. It’s the same GK110 GPU mounted on the same PCB with the same 6+2 phase power design. This is part of the reason that GTX 780 has the same TDP as GTX Titan, while at the same time giving GTX 780 as much or more TDP headroom than Titan itself. Using the same PCB also means that GTX 780 has the same 6pin + 8pin power requirement and the same display I/O configuration of 2x DL-DVI, 1x HDMI, 1x DisplayPort 1.2.
Also being carried over from Titan is GPU Boost 2.0, which was first introduced there and has since been added to additional products (many GeForce 700M products already have it). GPU Boost is essentially a further min-maxed turbo scheme that more closely takes into account temperatures and GPU leakage characteristics to determine what boost bins can be used while staying below TDP. It’s more temperature dependent than the original GPU Boost and as a result more variable, but in cooler situations it allows tapping into that thermal headroom to hit higher clockspeeds and greater performance, TDP allowing. At the same time this means GTX 780 also gains GPU Boost 2.0’s temperature target functionality, which allows users to cap boost by temperature as well as TDP. As with Titan this limit is 80C by default, with the idea being that adjusting the limit is a proxy for adjusting the performance of the card and the amount of noise it generates.
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milkman001 - Friday, May 24, 2013 - link
FYI,On the "Total War: Shogun 2" page, you have the 2650x1440 graph posted twice.
JDG1980 - Saturday, May 25, 2013 - link
I don't think that the release of this card itself is problematic for Titan owners - everyone knows that GPU vendors start at the top and work their way down with new silicon, so this shouldn't have come as much of a surprise.What I do find problematic is their refusal to push out BIOS-based fan controller improvements to Titan owners. *That* comes off as a slap in the face. Someone spends $1000 on a new video card, they deserve top-notch service and updates.
inighthawki - Saturday, May 25, 2013 - link
The typically swapchain format is something like R8G8B8A8 and the alpha channel is typically ignored (value of 0xFF typically written), since it is of no use to the OS, since it will not alpha blend with the rest of the GUI. You can create a 24-bit format, but it's very likely that for performance reasons, the driver will allocate it as if it were a 32-bit format, and not write to the upper 8 bits. The hardware is often only capable of writing to 32 bit aligned places, so its more beneficial for the hardware to just waste 8 bits of data and not have to do any fancy shifting to read or write from each pixel. I've actually seen cases where some drivers will allocate 8-bit formats as 32-bit formats, wasting 4x the space the user thought they were allocating.jeremyshaw - Saturday, May 25, 2013 - link
As a current GTX580 owner running at 2560x1440, I don't have any want of upgrade, especially in compute performance. I think I'll hold out for at least one more generation, before deciding.ahamling27 - Saturday, May 25, 2013 - link
As a GTX 560 Ti owner, I am chomping at the bit to pick up an upgrade. The Titan was out of the question, but the 780 looks a lot better at 65% of the cost for 90% of the performance. The only thing holding me back is that I'm still on z67 with a 2600k overclocked to 4.5 ghz. I don't see a need to rebuild my entire system as it's almost on par with the z77/3770. The problem is that I'm still on PCIe 2.0 and I'm worried that it would bottleneck a 780.Considering a 780 is aimed at us with 5xx or lower cards, it doesn't make sense if we have to abandon our platform just to upgrade our graphics card. So could you maybe test a 780 on PCIe 2.0 vs 3.0 and let us know if it's going to bottleneck on 2.0?
Ogdin - Sunday, May 26, 2013 - link
There will be no bottleneck.mapesdhs - Sunday, May 26, 2013 - link
Ogdin is right, it shouldn't be a bottleneck. And with a decent air cooler, you ought to be
able to get your 2600K to 5.0, so you have some headroom there aswell.
Lastly, you say you have a GTX 560 Ti. Are you aware that adding a 2nd card will give
performance akin to a GTX 670? And two 560 Tis oc'd is better than a stock 680 (VRAM
capacity not withstanding, ie. I'm assuming you have a 1GB card). Here's my 560Ti SLI
at stock:
http://www.3dmark.com/3dm11/6035982
and oc'd:
http://www.3dmark.com/3dm11/6037434
So, if you don't want the expense of an all new card for a while at the cost level of a 780,
but do want some extra performance in the meantime, then just get a 2nd 560Ti (good
prices on eBay these days), it will run very nicely indeed. My two Tis were only 177 UKP
total - less than half the cost of a 680, though atm I just run them at stock speed, don't
need the extra from an oc. The only caveat is VRAM, but that shouldn't be too much of
an issue unless you're running at 2560x1440, etc.
Ian.
ahamling27 - Wednesday, May 29, 2013 - link
Thanks for the reply! I thought about SLI but ultimately the 1 GB of vram is really going to hurt going forward. I'm not going to grab a 780 right away, because I want to see what custom models come out in the next few weeks. Although, EVGA's ACX cooler looks nice, I just want to see some performance numbers before I bite the bullet.Thanks again!
inighthawki - Tuesday, May 28, 2013 - link
Your comment is inaccurate. Just because a game requires "only 512MB" of video ram doesn't mean that's all it'll use. Video memory can be streamed in on the fly as needed off the hard drive, and as a result you can easily use a lot if you wanted as a performance optimization. I would not be the least bit surprised to see games on next gen consoles using WAY more video memory than regular memory. Running a game that "requires" 512MB of VRAM on a GPU with 4GB of VRAM gives it 3.5GB more storage to cache higher resolution textures.AmericanZ28 - Tuesday, May 28, 2013 - link
NVIDIA=FAIL....AGAIN! 780 Performs on par with a 7970GE, yet the GE costs $100 LESS than the 680, and $250 LESS than the 780.