2/14/2012 09:25:00 PM
dannzfay
With two days left to go until AMD launches its Radeon HD 7700-series of mainstream graphics cards, a GPU-Z screenshot of the Radeon HD 7770 has made its appearance on the Web, confirming the specs of this GPU.
This graphics core will come as the direct descendant of the Radeon HD 5770 and its HD 6770 rebrand, since it targets the same mainstream performance class, but this time it will utilize the new Cape Verde XT core.
Much like the Tahiti GPU that AMD has used for the graphics cards in the Radeon HD 7900 series, the Cape Verde graphics cores are also based on the Graphics Core Next (GCN) architecture.
Despite the similar architecture, the Cape Verde XT GPU has a much smaller die (123mm2 vs 365mm2 for the Tahiti GPU), since it packs only a fraction of the shaders of its older brother.
More precisely, the Cape Verde XT features 640 streaming processors, 40 texture units and 16 ROP units, all installed together with a 128-bit wide memory bus, according to the leaked Donaim Haber screenshot.
In the Radeon HD 7770, this is connected to 1GB of GDDR5 video buffer which is clocked at 1,125MHz (4.5GHz data rate) in order to deliver 72GB/s of bandwidth, while the GPU operating frequency is set at 1000MHz.
No information regarding the power consumption of the card has been provided, but a previously leaked image of a Radeon HD 7770 reference board has revealed that it comes with just a single 6-pin PCIe connector, which seems to imply that it requires just a little over 100 Watts in order to operate.
The HD 7770 will also support 2-way CrossFireX and packs 3 display outputs, one DVI, one HDMI and a mini-DisplayPort connector.
The card is expected to be released on February 15, but its pricing hasn’t been revealed yet.
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