
At the rear side of that rounded curve on the card we see two air intakes. The card is designed in such a manner that it will take in air from your PC and exhaust the heated air outside the PC. As always we recommend you to have a well ventilated PC with at least a 120mm intake and exhaust. Create some airflow fellas, really important.

All the way up front to the left you can see the two CrossfireX fingers / connectors. The HIS card is 100% reference based besides that sticker right there. The specifications are 100% the same as well:
| |
Radeon HD 4870 |
Radeon HD 5850 |
Radeon HD 5870 |
| Process |
55nm |
40nm |
40nm |
| Transistors |
956M |
2.15B |
2.15B |
| Die Size |
263 mm² |
334 mm² |
334 mm² |
| Core Clock |
750 MHz |
725 MHz |
850 MHz |
| Shader Processors |
800 |
1440 |
1600 |
| Compute Performance |
1.2 TFLOPs |
2.09 TFLOPs |
2.72 TFLOPs |
| Texture Units |
40 |
72 |
80 |
| Texture Fillrate |
30.0 GTexels/s |
52.2 GTexels/s |
68.0 GTexels/s |
| ROPs |
16 |
32 |
32 |
| Pixel Fillrate |
12.0 GPixels/s |
23.2 GPixels/s |
27.2 GPixels/s |
| Z/Stencil |
48.0 GSamples/s |
92.8 GSamples/s |
108.8 GSamples/s |
| Memory Type |
GDDR5 |
GDDR5 |
GDDR5 |
| Memory Clock |
900 MHz |
1000 MHz |
1200 MHz |
| Memory Data Rate |
3.6 Gbps |
4.0 Gbps |
4.8 Gbps |
| Memory Bandwidth |
115.2 GB/s |
128.0 GB/s |
153.6GB/s |
| Maximum Board Power (TDP) |
160W |
170W |
188W |
| Idle Board Power |
90W |
27W |
27W |
Please read our reference review for an in-depth view on the Radeon HD 5870.

And here we have the two cards all pimped out in our way too expensive test system. Looks good like a nice duo alright. Anyway, it is time to move onwards to some actual game benchmarking. But first let's peek at our test system.