HIS Radeon HD 4890 Turbo Edition

Graphics Cards
Viewing page 5 of 7 pages. Previous 1 2 3 4 5 6 7 Next

Power

The power consumption of an add-on video card can be estimated by comparing the total system power draw with and without the card installed. Our results were derived thus:

1. Power consumption of the graphics card at idle - When CPUBurn is run on a system, the video card is not stressed at all, and stays in idle mode. This is true whether the video card is integrated or an add-on PCIe 16X device. Hence, when the power consumption of the base system under CPUBurn is subtracted from the power consumption of the same test with the graphics card installed, we obtain the increase in idle power of the add-on card over the integrated graphics chip (Intel GMA950). (The actual idle power of the add-on card cannot be derived, because the integrated graphics does draw some power — we'd guess no more than a watt or two.)

2. Power consumption of the graphics card under load - The power draw of the system is measured with the add-on video card, with CPUBurn and FurMark running simultaneously. Then the power of the baseline system (with integrated graphics) running just CPUBurn is subtracted. The difference is the load power of the add-on card. (If you want to nitpick, the 1~2W power of the integrated graphics at idle should be added to this number.) Any load on the CPU from FurMark should not skew the results, since the CPU was running at full load in both systems.

Both results are scaled by the efficiency of the power supply (tested here) to obtain a final estimate of the DC power consumption.

Power Consumption Comparison (DC)
Card
Est. Power (Idle)
Est. Power (ATITool)
Est. Power (FurMark)
ATI HD 4830*
18W
80W
87W
Diamond HD 4850
50W
101W
N/A
Asus ENGTX260
35W
122W
N/A
ATI HD 4870 1GB
67W
121W
134W
HIS HD 4890 Turbo 1GB
71W
124W
149W
* sample with unknown number of stream processors

Our 4890 sample had slightly higher power consumption than its predecessor, the HD 4870, despite any power regulation improvements ATI may have implemented in the new core, though it should be noted the Turbo edition card is factory overclocked by 50 MHz. The power consumption of ATI's faster cards hasn't improved, not since the upgrade the 55 nm manufacturing process (HD 3000 series).

Video Playback Power Consumption (AC)
Card
Rush Hour
(H.264)
Coral Reef
(WMV-HD)
Drag Race
(VC-1)
Sparkle GTS 250 1GB
133W
136W
164W
Diamond HD 4850 512MB
123W
134W
160W
Asus ENGTX260 896MB
136W
151W
176W
ATI HD 4870 1GB
183W
176W
199W
HIS HD 4890 Turbo 1GB
180W
174W
197W

Power consumption during video playback was similar as well. No surprises here.



Previous 1 2 3 4 5 6 7 Next

Graphics Cards - Article Index
Help support this site, buy the HIS Radeon HD 4890 Turbo from one of our affiliate retailers!