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Tuesday, February 18, 2014
Nvidia Announces The GeForce GTX 750, GTX 750 Ti And GTX Titan Black GPUs


Nvidia today took the wraps off the new GeForce GTX 750 and GTX 750 Ti GPUs, both based on its first-generation "Maxwell" technology. The company also unveiled the successor of the GTX 780Ti, the Geforce GTC Titan Black.

Both the GeForce GTX 750 and the GTX 750 Ti are based on the Maxwell GM107 GPU, which was made using TSMC's 28nm HP node.

Nvidia's Maxwell is a Direct3D 11.0 compliant design, supporting the base 11.0 functionality along with many of the features required for Direct3D 11.1 and 11.2.

I/O functionality is identical to Kepler, with 4 display controllers backing NVIDIA's capabilities. HDMI 1.4 and DisplayPort 1.2 functionality join the usual DVI support.

With Maxwell, NVIDIA's video encoder NVENC, has received an performance boost. NVIDIA says that Maxwell's NVENC should be 1.5x-2x faster than Kepler's NVENC.

Decoding is also receiving a bit of a lift. Maxwell's VP video decode block won't feature full H.265 (HEVC) support, but it will offer partial hardware acceleration, relying on software and hardware to decode H.265. Nvidia says that decoding is getting a 8x-10x performance boost due to the implementation of a local decoder cache and an increase in memory efficiency for video decoding.

The company has also improved the density of the new designs with Maxwell. Denser designs allow for NVIDIA to offer similar performance as larger Kepler GPUs with a smaller Maxwell GPU.

With GM107 in being a 128-bit design that would need to compete with the likes of the 192-bit GK106, NVIDIA has increased the amount of L2 cache they use, from 256KB in GK107 to 2MB on GM107.

But most importantly, with Maxwell NVIDIA is almost solely focused on improving energy efficiency and performance per watt.

Nvidia says a GeForce GTX 750 Ti running at 1080p resolution doubles the performance and uses half the power of the GTX 550 Ti, which was built with the Fermi architecture.

The GTX 750 Ti also approximates the performance of the GeForce GTX 480 -- a $499 flagship product also based on the Fermi architecture -- while consuming only one-fourth the power, or 60 watts.

The GTX 750 Ti and 750 GPUs also include support for NVIDIA's GameWorks program and gaming technologies, including:

- ShadowPlay, which lets gamers capture and share their gaming experiences on Twitch and other online sites,
- G-SYNC display technology, for stutter-free gaming visuals, and
- GameStream, which allows gamers to stream their favorite PC games to NVIDIA SHIELD for high-performance gaming on the go.



In terms of specs, the GeForce GTX 750 Ti packs a complete GM107 implementation, comprising 5 SMMs, 640 CUDA cores, 16 ROPs, and 40 texture units, and fed by 2MB of L2 cache.

GTX 750 Ti?s GM107 GPU is paired with 2GB of GDDR5, on a 128-bit bus.

The GTX 750 Ti GPU's small physical design -- at 5.7-inches long -- doesn't require an internal power connector.

When it comes to clockspeeds NVIDIA is putting the GTX 750 Ti's core clock at 1020MHz with a boost clock of 1085MHz. The memory will be clocked at 5.4GHz, which on a 128-bit bus is enough to provide 86.4GB/sec of memory bandwidth.

NVIDIA wants to leverage GM107 and the GTX 750 series to capture this market for HTPC use and OEM system upgrades alike. The GTX 750 is based on a cut-down GM107 GPU, utilizing just 4 of GM107?s 5 SMMs. This reduces the CUDA core count to 512 and the number of texture units to 32. GPU clockspeeds are identical to GTX 750 Ti while the memory subsystem is further reduced to 1GB of GDDR5 running at 5GHz.

NVIDIA GPU Specification
 
GTX 660
GTX 750 Ti
GTX 750
GTX 650
CUDA Cores
960
640
512
384
Texture Units
80
40
32
32
ROPs
24
16
16
16
Core Clock
980MHz
1020MHz
1020MHz
1058MHz
Boost Clock
1033MHz
1085MHz
1085MHz
N/A
Memory Clock
6GHz GDDR5
5.4GHz GDDR5
5GHz GDDR5
5GHz GDDR5
Memory Bus Width
192-bit
128-bit
128-bit
128-bit
VRAM
2GB
2GB
1GB
1GB
FP64
1/24
1/32
1/32
1/24
TDP
140W
60W
55W
64W
Transistor Count
2.54B
1.87B
1.87B
1.3B
Manufacturing Process
TSMC 28nm
TSMC 28nm
TSMC 28nm
TSMC 28nm
Architecture
Kepler
Maxwell
Maxwell
Kepler
GPU
GK106
GM107
GM107
GK107
Price
$229
$149
$119
$109


The NVIDIA GeForce GTX 750 Ti and GTX 750 GPUs are now available from Nvidia's add-in card suppliers, including ASUS, Colorful, EVGA, Gainward, Galaxy, Gigabyte, Innovision 3D, MSI, Palit, PNY and Zotac. Pricing is expected to start at $119 for the GTX 750, $139 for the 1GB GTX 750 Ti and $149 for the 2GB GTX 750 Ti.

The GeForce GTX 750 Ti and GTX 750 GPUs will also be sold in fully configured systems from U.S.-based system builders.

NVIDIA is placing both the GTX 750 Ti and GTX 750 between the GK106 flagship GTX 660 and the GK107 flagship GTX 650. The GTX 750 Ti will replace the GTX 650 Ti Boost, and GTX 750 is expected to retire GTX 650 Ti.

AMD's competition for the GTX 750 series will be the Radeon R7 265, and the recently price dropped Radeon R7 260X, which are set to go for $149 and $119 respectively.

According to the first reviews for the cards that have appeared online, the the GTX 750 Ti is nearly 2x as fast as the GTX 650, and nearly 3x faster than the GT 640.

However, Radeon R7 265 holds a 15-20% lead over GTX 750 Ti. Similarly, Radeon R7 260X averages a 10% lead over GTX 750, and it does so while having 2GB of VRAM to GTX 750's 1GB.


NVIDIA's GeForce GTX Titan Black


NVIDIA's GeForce GTX Titan Black is a full GK110 implementation, just like the GTX 780 Ti, and packs 6GB of GDDR5. Titan Black improves on its predecessor by also using the full GK 110 die, one that calls for 2,880 shaders and 240 texture-units housed in 15 SMXs. Titan Black delivers a 5.1 Teraflops of computing performance per card



Core frequency sees a nice hike over first-generation Titan, now running at a peak 980MHz instead of 876MHz.The memory runs at a full 7GHz data rate just like the 780 Ti. The GK110 core and boost clocks are up by 1.6% and 5.6% compared to the 780 Ti, respectively.

And compared to the original Titan, you should expect a 14% to a 20% increase in performance on compute bound workloads or a 17% increase on memory bandwidth bound workloads. Gaming performance should be equal to the 780 Ti.

 
GTX Titan Black
GTX 780 Ti
GTX Titan
GTX 780
Stream Processors
2880
2880
2688
2304
Texture Units
240
240
224
192
ROPs
48
48
48
48
Core Clock
889 MHz
875 MHz
837 MHz
863 MHz
Boost Clock
980 MHz
928 MHz
876 MHz
900 MHz
Memory Clock
7GHz GDDR5
7GHz GDDR5
6GHz GDDR5
6GHz GDDR5
Memory Bus Width
384-bit
384-bit
384-bit
384-bit
VRAM
6GB
3GB
6GB
3GB
FP64
1/3 FP32
1/24 FP32
1/3 FP32
1/24 FP32
TDP
250W
250W
250W
250W
Transistor Count
7.1B
7.1B
7.1B
7.1B
Manufacturing Process
TSMC 28nm
TSMC 28nm
TSMC 28nm
TSMC 28nm
Price
$999
$699
$999
$649


Each TITAN BLACK also supports up to four displays per card - two DVI, one HDMI and one DisplayPort.

Availability is expected to be limited on the GeForce GTX Titan Black, with cards to retail for $999.




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