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AMD’s line-up of Evergreen-based graphics cards is very tight today. If you want to enjoy DirectX 11, you can choose anything from the cheap, yet quite games-capable Radeon HD 5670 to the expensive dual-processor flagship Radeon HD 5970. In between these two extremes there are as many as four models: Radeon HD 5750 ($109-129), Radeon HD 5770 ($159), Radeon HD 5850 ($279-299) and Radeon HD 5870 ($379-399). Taking a look at their prices, which regrettably often differ from the retail ones, you can see that there is a substantial difference between the Radeon HD 5770 and Radeon HD 5850 which is not filled by a DirectX 11 compatible product. Trying to close this gap up, AMD announces one more model: Radeon HD 5830!

As its model number suggests, the HD 5830 is the junior model based on the Cypress processor. Its recommended price is so far specified vaguely as below $250. Considering the prices of Radeon HD 5850 and HD 5770, we expect the Radeon HD 5830 to cost $200-210. This is also below $250 but somewhat more specific.

The most peculiar thing about the ATI Radeon HD 5830 is that there are no reference samples from AMD. The company relies on its partners on all manufacturing issues concerning the new graphics card. So, soon after the announcement there will be a lot of Radeon HD 5830 products varying in PCB design and cooling solutions. The only requirement for the partners is that the new card’s specs be adhered to.

Specifications

Let’s take a look at the Radeon HD 5830 specs in comparison with similarly priced products as well as with one junior and one senior model.

Click to enlarge

Click to enlarge

What do we see here? First, the new card has 1120 unified shader processors, which is 320 processors less than in the Radeon HD 5850 and 320 more than in the Radeon HD 5770. Exactly in between, as you can see. Second, the number of texture-mapping units has been reduced accordingly. There are 56 of them now (16 less than in the HD 5850 and 16 more than in the HD 5770). But we guess that the most significant factor is that the number of raster back-ends is cut by half. Instead of 32 RBEs as in the Radeon HD 5850, the HD 5830 has only 16 of them, exactly like in the Radeon HD 5770. The GPU frequency is increased to 800 MHz, however. This is 75 MHz higher than with the Radeon HD 5850. The memory type, bus and frequency are all the same as those of the HD 5850.

 
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