ATI Radeon HD 5970 is built "speed limiter" that prevents overclocking

Thursday, November 26, 2009

When issuing the most powerful to date, dual-chip accelerator ATI Radeon HD 5970, AMD has assured his fans that the accelerator not only enjoys outstanding features and performance, and excellent overclocking potential. However, some tests show that with the latest features in ATI Radeon HD 5970 is not so smooth.

For example, resource experts Legion Hardware have discovered that the manufacturer put inside the card ATI Radeon HD 5970 a special mechanism to protect against overheating. This mechanism prevents too much rise in temperature which occurs during acceleration device to higher frequencies. When overheating GPU frequency is automatically reduced, which, naturally, hinders the process of overclocking.

Experts felt Adapter ATI Radeon HD 5970 to test application FurMark at 1680 x 1050 pixels. Both GPU while working at a frequency of 875 MHz, and the level of voltage supplied to them was raised to 1.1625 volts. The frequency of GDDR5 memory has remained of stock value. In such conditions, the average frame rate images (Average Frame Rate) reached a level of 115 frames per second. However, after 40 seconds after the core temperature reached 100 degrees, led to the release GPU clock speed to a mark in the 550 MHz. This, of course, declined and the average frame rate was below the level at 100 frames per second.

An AMD representative Dave Bauman (Dave Baumann) in an interview with TG Daily hastened to reassure the public, stating that the above test results in FurMark merely reflect the effectiveness of the mechanism of protection against overheating, a built-in ATI Radeon HD 5970. He emphasized that in real applications, or video games, this mechanism will in fact invisible, and his desire to avoid the need to explain failure of the system components.