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Sapphire Radeon HD 4830 512MB
Video, Power, and Overclocking
HQV
130
130
130
128
128
0
Score (130 = highest)
149.5
HQV
100
100
100
100
95
0
Score (100 = highest)
115
ATI, always a little ahead of NVIDIA with these generations of video cards, delivers a slightly better HQV score. I do notice the moire, but it only lasts a split-second and only after skipping around in the video stream. The rest is picture-perfect. 
Power Consumption
(Show All Graphs)
25
32
39
48
56
0
Watts (lower is better)
138
48
67
88
91
120
0
Watts (lower is better)
138
Another no-surprises test, the power consumption is a little on the high side, but not higher than the faster cards in this comparison. I think the performance trade-off is worth it, seeing how at the very worst, you're using 40 more watts than the much slower 4670. The cooling does its part really well, keeping the core or below 50 degrees at idle and under 70 degrees under load. This might sound high, but all the HD 4800s run warm, and this is chilly by comparison. The fan doesn't slow down to the point where it's ever inaudible but it's a lot quieter than a 4850 under load, and despite its looks, actually impresses me all-around. 
Overclocking
(Show All Graphs)
690
575
0
MHz (higher is better)
1357
1180
900
0
MHz (higher is better)
1357
And the cooling really shows its merits here. A 20% overclock on the core, and a 30% memory overclock. This did work out to be about a 15-25% improvement over its stock scores, and single-handedly earns this card my endorsement. A 25% overclock on a stock video card without zealous cooling? This one's easy to recommend.
Page 1: Introduction, The Card & Bundle
Page 2: Specifications and Setup Page 3: DirectX 10 Titles Page 4: DX9, OpenGL, and Synthetics Page 5: Video, Power, and Overclocking Page 6: Conclusion 
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