|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Thursday, 03 May 2012|
Page 12 of 13
NVIDIA GPU Boost
Like the CPU found inside computer systems, the GPU found in video cards almost never reaches 100% usage. In fact, the CPU and GPU rarely use more than 10% of their available power, yet consume energy regardless of how much is actually needed. NVIDIA has recognized this, and followed suite with CPU manufacturers to offer variable clock speeds and power consumption. NVIDIA GPU Boost technology enabled the GeForce GTX 680 video card to dynamically adjust power and clock speeds based on real-time application demands, automatically tweaking these settings several times per second.
In some of the more demanding video games and applications there may occasionally be a time when the GPU is being fully utilized, which is when NVIDIA GPU Boost increases clock frequency to deliver improved graphics performance and higher image quality. NVIDIA GPU Boost is a combination of dedicated hardware circuitry that continually monitors GPU power consumption along with software technology that works in the background on GeForce GTX 690, and automatically adjusts the graphics clock speed based on application demands.
Using the EVGA PrecisionX tool (version 3.0.2 illustrated above with special GeForce GTX 690 skin), our test sample was able to remain stable with a 1215 MHz peak overclock (1158 MHz Boost) to the NVIDIA GPU Boost threshold, with the GeForce GTX 690s 4GB GDDR5 video frame buffer memory set to operate at 1601 MHz. Both settings used a maximum increase of target power (135%), and all tests were run with 95% fan speed.
AMD and NVIDIA already stretch their GPUs pretty thin in terms of overclocking head room, but there's a difference between thin and non-existent. In this section, Benchmark Reviews compares stock versus overclocked video card performance on the GeForce GTX 590 with default voltage supplied to the GPUs. Here are the test results:
GPU Overclocking Results
*Please note that the actual NVIDIA GPU Boost clock speed will vary, depending on system conditions and application demands. Typical GPU Boost speed shown.
Overclocking Summary: With a 138 MHz overclock that represents a 15.1% increase in typical GPU speed, our baseline results indicate an average increase of about 11.8% in actual frame rate performance at 1920x1200 resolution. This usually amounted to an additional 10+ FPS in most scenes. This is a decent performance boost, especially considering we're working with a dual-GPU graphics card, and every extra frame translates into an advantage over your enemy.