Review: ASUS Radeon HD 7850 DirectCU II Top
Published by Christian Ney on 05.04.12Technical data / specifications
| Radeon HD 7870 | ASUS HD 7850 DirectCUII Top | Radeon HD 7850 | Radeon HD 6950 | |
| Chip | Pitcairn XT | Pitcairn Pro | Pitcairn Pro | Cayman Pro |
| Process | 28 nm | 28 nm | 28 nm | 40 nm |
| Transistors | 2.8 billion | 2.8 billion | 2.8 billion | 2.64 billion |
| GPU clock | 1'000 MHz | 975 MHz | 860 MHz | 800 MHz |
| Memory | 2'048 MB GDDR5 | 2'048 MB GDDR5 | 2'048 MB GDDR5 | 2'048 MB GDDR5 |
| Memory clock | 1'200 MHz | 1'250 MHz | 1'200 MHz | 1'250 MHz |
| Memory interface | 256 Bit | 256 Bit | 256 Bit | 256 Bit |
| Memory bandwidth | 153'600 MB/s | 160'000 MB/s | 153'600 MB/s | 160'000 MB/s |
| TMUs | 80 | 64 | 64 | 88 |
| TAUs | 80 | 64 | 64 | 88 |
| Shader Cores | 1280 scalar | 1024 scalar | 1024 scalar | 352 (4D) |
| ROPs | 32 | 32 | 32 | 32 |
| TDP | 175 Watt | 130 Watt | 200 Watt |
As you might expect the ASUS HD 7850 DirectCU II Top is everything but standard. First of all core clock speeds have been increased from 860 MHz to 975 MHz and the memory has also been overclocked but not that much - from 1'200 MHz to 1'250 MHz in fact. For factory overclocked cards ASUS uses "Top" in the name. Furthermore ASUS equipped this card with its own DirectCUII cooler. In this case they chose to go for the dual slot version. This cooler features two 80 millimeter fans as well as three heatpipes. Each of which has a diameter of six millimeters. In 2D mode the card is almost inaudible and under load it still is much quieter than AMDs reference design.
ASUS also changed the the power design with this DirectCUII model. In this case you get four phases for the GPU and two dedicated to the memory which should guarantee some good overclocking values.
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