Our test procedure is an in-system test, designed to determine whether the card is capable of being adequately cooled in a low-noise system. By adequately cooled , we mean cooled well enough so that no misbehavior related to thermal overload is exhibited. Thermal misbehavior in a graphics card can show up in a variety of ways, including…. The test system was built around the coolest Intel Prescott-based processor currently available.
Almost all AMD-based processors should run cooler than our Pentium , and almost all Intel-based desktop processors run hotter. System airflow is quite good, allowing the CPU and system fans to run at close to inaudible speeds without compromising system cooling. The intake is about the size of a mm fan. The only restriction is an air filter.
A much more restrictive cover for the filter was removed because it impeded the airflow too much. The one and only intake….
There is only one point of exhaust: The mm case fan, which will be run at a number of different speeds. The 80mm fan in the Neo HE power supply was taken out of the picture by using a custom-built duct to ensure that the fan never ramped up.
The amount of airflow through the system can be controlled by adjusting the speed of the case fan, thereby giving us a way of controlling how difficult the thermal environment inside the case is.
A fresh air duct isolates the power supply from the rest of the system. Only one possible points of exhaust: The orange case fan. The fan in the power supply draws its air from a duct that does not interact with the rest of the system airflow. The airflow in our test rig is typical of an ATX case. Air flows in through the intake near the bottom of the front panel, and is pulled up to the top rear corner.
Most of this air will bypass the expansion cards altogether, but a small amount will be pulled across the rear of the card as it is pulled towards the CPU heatsink and the case fan. All of the air will exit the case via the exhaust fan.
The air will flow from the lower right to the upper left, drawing a small amount of air across the VGA card. An initial test was run with the system fan running at 12 volts, and then the fan was progressively slowed down to make the thermal environment more difficult. Because no thermal monitoring was available on either of the two cards we tested, CPU temperature was used to determine when the temperature had stabilized.
Once the temperature was determined to be stable, the stress software was left running for at least another 20 minutes while we watched the screen carefully for visual artifacts that might indicate overheating. The last test, with the system fan running at 5 volts, was left running for more than an hour. The cards were determined to have passed our testing if they managed to survive the full two hour test without ATI Tool detecting any artifacts. An initial testing phase was carried out using the integrated graphics on the system motherboard to establish baseline levels for system power and CPU temperature.
Proper stress on the integrated graphics might raise the results by another watt or two, but the impact on the rest of the system temperatures would probably be minimal. Before the failure, the system power consumption gradually crept up by about 10W to a peak power consumption of W just before it failed. Then, just as we were about to turn the fan down to the next level, the screen went blank and we heard the BIOS beep as the computer restarted. We believe this model will deliver exceptional quality and performance to the most demanding user for 3D games, streaming media, digital video, and office applications.
If you do decide to get a videocard like the EAXXT Silent though, make sure you have adequate cooling in your case, as inadequate airflow will cause overheating. For the money you get a videocard that's capable of running the latest games with the latest features such as Shader Model 3.
In the second column are the general specs for the reference platforms this Radeon X XT based videocard is to be compared against. Since the heatpipe heatsink on the rear of the videocard extends out some distance, it's possible that there could be some interference. Shopbop Designer Fashion Brands. Privacy policy and Terms of Use.
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