Pros
Excellent performance for the price. Uses relatively little
power. Includes full range of current-generation Nvidia features.
Cons
Not quite the fastest card out there. Blocks a second
expansion slot.
Nvidia may call its newest release, the GeForce GTX 670, a
video card, but another term might be more appropriate: AMD killer. It’s tough
to think of many other useful ways to describe this product, which doesn’t just
employ the impressive technologies Nvidia introduced on its Kepler-based
top-of-the-line single-GPU card, the GTX 680, a
couple of months ago, but does so with performance and at a price ($399 list)
that give AMD’s flagship card, the Radeon HD 7970 ,
a serious run for its money—and threatens to steamroll the same-priced Radeon HD 7950 altogether.
Though you’ll still need to pony up an extra Benjamin to get the
fastest-of-the-fastest GTX 680, those who want to keep a little of their
cash—and can live with a little less speed—will find the GTX 670 unusually
compelling.
As far as its construction is concerned, the GTX 670 is,
much like its predecessors the GTX 570 and the GTX 470, a toned-done version of
the top product in the stack. Though the GTX 670 shares the GTX 680’s four
Graphics Processing Clusters (GPCs), it has dropped one advanced Streaming
Multi Processor (SMX) for a total of seven. This reduces the number of CUDA
parallel processing cores (from 1,536 to 1,344) and texture units (from 128 to
112). The base clock speed has also been lowered (from 1,006MHz to 915MHz),
though the amount of memory (2GB) and its clock rate (6,008MHz) have remained
unchanged.
As, for that matter, have a lot of the other features, such
as GPU Boost (which can accelerate the base clock to a higher value when the
electrical and thermal headroom exists for it—though here to an average of
980MHz rather than the GTX 680’s 1,058MHz), four output ports (two dual-link
DVI, one HDMI, and one DisplayPort), and the ability to drive a total of four
monitors from a single card. Even the GTX 680’s basic power improvements have
been retained in almost their entirety: Nvidia recommends a slightly smaller
power supply for this card (500 watts instead of 500 watts) for use with its
marginally lower TDP (170 watts versus 195 watts), but the card requires the
same dual six-pin PCI Express (PCIe) power connectors. (As with most upper-tier
cards, it will also block an adjacent slot in your PC.)
If all this sounds like you should expect near–GTX 680
performance from the GTX 670, congratulations—because that’s almost exactly
what we found. Looking at our slate of gaming tests running at 1,920 by 1,200
with all settings maxed out, the GTX 670 was routinely nipping at the GTX 680’s
heels, with results like 50.5 frames per second (fps) versus 52fps in Aliens
vs. Predator, 67fps versus 68fps in Batman: Arkham City,
86.1fps versus 92.9fps in DiRT 3, 63.7fps versus 67fps in Just Cause 2, and
64.8fps versus 70.3fps in Lost Planet 2.
So in almost every case, the GTX 680 does not have a significant performance
lead despite its higher price.
What’s more surprising is how well the GTX 670 competes not
with the Radeon HD 7950, which you’d expect (as it also hovers around $399),
but the 7970—which can be found for upwards of $450. The GTX 670 came out ahead
of the AMD card more often than we could have anticipated: in Futuremark 3DMark 11 (2,868
for the GTX 670, 2,801 for the 7970), in DiRT 3 (the 7970 managed 82.5fps), in
the Heaven
Benchmark(40.3fps versus 40fps) in Just Cause 2 (the 7970 picked up
60.5fps), and in Lost Planet 2 (53.9fps for the 7970). In the other
aforementioned tests the 7970 was the winner—but you would think it wouldn’t
even be a close contest.
Then there’s power usage. We weren’t surprised that the GTX
670 excelled here, given how astonishing both the GTX 680 and its dual-GPU
successor, the GTX 690, have
proven. But, still, a full system idling at 98.2 watts (as measured with an
Extech Datalogger) and using 291.6 watts under full graphics load—compared with
298.2 watts for the GTX 680 and 345.7 watts for the 7970) is impressive.
Come to think of it, “impressive” is a good word to use to
describe the GTX 670 overall. With this card, Nvidia may very well be redrawing
the battle lines around $400 rather than $500, where (for the last few years,
at least) the highest-level fighting in the market has occurred. In terms of
sheer performance, AMD is having serious trouble competing at the prices Nvidia
has set—and, barring a truly unforeseen development, it may not be until the
next generation (which could be six months away or more) that AMD can reorient
itself. That’s a potential problem.
But for consumers it’s an undisguised blessing, as the GTX 670
presents them an opportunity to get almost-best-in-class performance while
paying only about 80 percent of the price of the current single-GPU champ. It’s
not entirely clear what this means for the future of the GTX 680, as paying
$100 more for it doesn’t get you commensurate performance in most
cases—although if all you’re concerned with is having the fastest card out
there, you probably don’t care. For everyone else the GTX 670 is an outstanding
buy and a fascinating glimpse into the more powerful (and less expensive)
places the enthusiast video card market may be heading.
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