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Sapphire Radeon HD 4850 512MB Toxic Video Card
Video Quality, Power Usage & Noise, and Overclocking
HQV
130
130
130
130
128
0
Score (130 = highest)
149.5
HQV
100
100
100
100
100
0
Score (100 = highest)
115
Video playback is pretty much perfect. I would like to see a little better moire reduction, but it's technically perfect by HQV's standards, and you'll only see it if you're, say, watching a DVD and skip a chapter: for a fraction of a second, it'll be noisy. 
Power Consumption
(Show All Graphs)
39
45
56
67
75
0
Watts (lower is better)
149.5
95
104
120
125
130
0
Watts (lower is better)
149.5
But something, apparently, had to give. The Toxic loves juice. It's high at idle, and at load, uses more power than even an HD 4870. At no point does the Zalman heatsink speed up, though. It growls along at its default speed no matter what you're doing. Which isn't great, actually. With a little third-party help, you can slow down the fan, which is on par with the stock heatsink, noise-wise, and it doesn't fluctuate. It's totally unnecessary outside of even more overclocking. One thing I've noted is that I was never able to get the temperature of the card through software. It reported zero degrees Celsius constantly. I don't know if this is by design or omission, although some outside metering put the card between 60 and 70 degrees, which is a big drop from the stock results of around 85. 
Overclocking
(Show All Graphs)
700
675
0
MHz (higher is better)
1380
1200
1150
0
MHz (higher is better)
1380
Overclocking in the Catalyst Control Center went by quickly. It got to the utility's ceiling of 700 GPU/ 1200 memory in about five minutes. I have no doubts that the card can surpass that with other overclocking utilities. So that's awesome, by the way. Given that at stock, a 4850 can continue to overclock after the GPU hits 90 degrees, I'd feel safe assuming that overclocking and reducing the fan's speed can be done mutually.
Page 1: Introduction, First Impressions, Specifications & Test 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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Add Comment
1 User Comment 1 - Posted by
Cessus
on September 16, 2008 - 2:05 pm got one of theses and its almost as fast as my 9800gtx+ i love it
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