Introduction

NVIDIA released their GeForce GTX 1070 and GTX 1080 not too long ago, featuring the company's new Pascal architecture, a brand-new 16 nanometer production process, and GDDR5X memory. In our launch-day review, we were truly impressed by how well NVIDIA claimed the performance throne with the 1080, but also the GTX 1070 managed to impress with its high-end performance at an attractive sub-$400 price-point. The reference-design card, however, is sold at a $70 premium over the GTX 1070 Founders Edition sitting at $449.

The GeForce GTX 1070 uses the same Pascal GP104 graphics processor as the GTX 1080, with just 1920 enabled shaders instead of 2560, which also affects the number of texture units that are down to 120 from 160. With 64, the number of ROPs is the same, and so is the memory capacity of 8 GB. However, today's review subject, like all GTX 1070 variants, uses GDDR5 memory, unlike the GTX 1080 that comes with GDDR5X. GDDR5X offers twice the bandwidth at the same operating frequency, so NVIDIA is running the GeForce GTX 1070's memory at a frequency of 2 GHz in order to make up for that.



Gigabyte's GTX 1070 XtremeGaming is the company's highest-clocked GTX 1070 variant, featuring a large triple-fan, triple-slot cooler and a large overclock to a base clock of 1671 MHz out of the box; memory is overclocked as well.

The GTX 1070 Xtreme Gaming currently retails at $460, which is a significant increase over the cheapest GTX 1070 models that can be found for as low as $380 now.

Packaging

You will receive:

• Graphics card
• Documentation
• Gigabyte wrist band

The Card

The GTX 1070 Xtreme Gaming follows the company's "XtremeGaming" style, most of the cooler dominated by black plastic and with some silver highlights. You'll find a metal backplate on the back. Dimensions of the card are 29.0 cm x 14.0 cm.


Installation requires three slots in your system.


Display connectivity options include a DVI port, an HDMI port, and three DisplayPorts. On the back of the card are another two HDMI ports. Since the NVIDIA GPU does not support as many active outputs at the same time, Gigabyte added extra circuitry to the board to detect your output configuration. Detection requires a reboot, so when running in VR mode with 3x HDMI and 3x DP ports enabled, connecting a DVI monitor does nothing until you reboot. The card will detect the outputs and switch to the non-VR configuration of 1x DVI, 1x HDMI and 3x DP once the reboot has taken place. Unlike previous NVIDIA cards, the DVI port no longer includes an analog signal, so you'll have to use an active adapter. NVIDIA also updated DisplayPort to be 1.2 certified and 1.3/1.4 ready, which enables support for 4K @ 120 Hz and 5K @ 60 Hz or 8K @ 60 Hz with two cables.

The GPU also comes with an HDMI sound device. It is HDMI 2.0b compatible, which supports HD audio and Blu-ray 3D movies. The GPU video encoding unit has been updated to support HEVC at 10-bit and 12-bit.


NVIDIA made some changes to SLI. Two-way SLI is now the only officially supported configuration for gaming. Three-way or Quad SLI can no longer be enabled in games; however, they do work in a few benchmarks. Also, for 4K at 60 Hz and above, NVIDIA recommends a new high-bandwidth SLI bridge called "SLI HB," which occupies both SLI fingers. The old bridges will work fine at lower resolutions.


Pictured above are the front and back, showing the disassembled board. High-res versions are also available (front, back).

A Closer Look

Gigabyte's thermal solution uses four heatpipes to keep the GPU cool. This is a change compared to the GTX 1080 Xtreme Gaming with six heatpipes.


The backplate has thermal pads for a little bit of cooling for the VRM circuitry.


Gigabyte upgraded the power input of their GTX 1070 to an 8-pin and a 6-pin. This input configuration is specified for up to 300 watts of power draw.


The uP 9511 voltage controller is a new model for recent NVIDIA cards. It does not support voltage control via I2C.


The GDDR5 memory chips are made by Samsung and carry the model number K4G80325FB-HC25. They are specified to run at 2000 MHz (8000 MHz GDDR5 effective).


NVIDIA's GP104 graphics processor is the first consumer chip to use the Pascal architecture. It is produced on a 16 nm process at TSMC, Taiwan, with a transistor count of 7.1 billion and a die size of 314 mm².