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VisionTek Radeon HD 4870 X2 2GB Redux
Video, Power, and Overclocking
HQV
130
130
130
130
130
128
0
Score (130 = highest)
149.5
HQV
100
100
100
100
100
100
0
Score (100 = highest)
115
The card delivers great HD 4000 video playback, with barely noticeable moire after skipping chapters of a DVD. Normal playback is perfect. 
Power Consumption
(Show All Graphs)
39
43
65
75
116
0
Watts (lower is better)
247.25
95
125
166
191
215
0
Watts (lower is better)
247.25
My initial power metering was clearly affected by bad drivers, and not running both cores correctly or at all: this means that the card uses a whole lot of power. Two-hundred fifteen watts! A new record!. At idle, things are a little better, a mere 16W over, ah, a hundred watts. The card is, fortunately, quiet, even under a full load. It can sustain a lot of heat, and the enclosed heatsinks appear to be of better construction than the original, the 3870 X2. Both are copper, and the second heatsink has a conspicuously thick base; I think it houses a vapor-chamber. At idle, the card sits on the high side of 70 degrees. Under load, it's close to 90. While this may bother people, the hardware doesn't seem to be affected and it overclocks still. There is a slight whisper of coil noise, but only when the card runs at full speed and it's not strong enough to escape a case, and it gets quickly overwhelmed by the relatively quiet fan. 
Overclocking
(Show All Graphs)
790
750
0
MHz (higher is better)
1138.5
990
900
0
MHz (higher is better)
1138.5
Both GPUs (which can be overclocked independently, if you choose) maxed out in Catalyst Control Center, at 790 CPU/ 990 memory, or 40MHz/ 90MHz over stock, respectively. This isn't much, but does it really have to be?
Page 1: Introduction, The Card & Bundle, Specifications and Setup
Page 2: DirectX 10 Titles Page 3: DX9, OpenGL, and Synthetics Page 4: Video, Power, and Overclocking Page 5: Conclusion 
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