A few weeks ago AMD launched their Radeon HD 7700 Series. The cards use
the all-new Cape Verde graphics processor which is based on AMD's new
GCN Graphics Core Next architecture that promises increased performance
and lower power draw.
Cape Verde is a downscale from the "Tahiti" silicon, on which higher
Radeon HD 7900 series parts are based. There are fewer number of
redundant components, so Cape Verde is left functionally-identical to
Tahiti, but is smaller, built for more affordable graphics cards. Cape
Verde also retains the basic hierarchy of the architecture as
implemented in Tahiti.
Gigabyte's HD 7770 OC is a custom implementation of the HD 7770. It
features a massively increased GPU clock speed of 1100 MHz. Memory clock
has been increased too, to 1250 MHz.
Radeon HD 7770 Market Segment Analysis
|
|
| Radeon
HD 7750 | GeForce
GTX 550 Ti |
|
| GeForce
GTX 460 | GeForce
GTX 460 |
| Radeon HD 7770 | Gigabyte HD 7770 OC | GeForce
GTX 560 |
|
| Shader Units |
|
| 512 | 192 |
|
| 336 | 336 |
| 640 | 640 | 336 |
|
| ROPs |
|
| 16 | 24 |
|
| 24 | 32 |
| 16 | 16 | 32 |
|
| Graphics Processor |
|
| Cape Verde | GF116 |
|
| GF104 | GF104 |
| Cape Verde | Cape Verde | GF114 |
|
| Transistors |
|
| 1500M | 1170M |
|
| 1950M | 1950M |
| 1500M | 1500M | 1950M |
|
| Memory Size |
|
| 1024 MB | 1024 MB |
|
| 768 MB | 1024 MB |
| 1024 MB | 1024 MB | 1024 MB |
|
| Memory Bus Width |
|
| 128 bit | 192 bit |
|
| 192 bit | 256 bit |
| 128 bit | 128 bit | 256 bit |
|
| Core Clock |
|
| 800 MHz | 900 MHz |
|
| 675 MHz | 675 MHz |
| 1000 MHz | 1100 MHz | 810 MHz |
|
| Memory Clock |
|
| 1125 MHz | 1026 MHz |
|
| 900 MHz | 900 MHz |
| 1125 MHz | 1250 MHz | 1002 MHz |
|
| Price |
|
| $110 | $120 |
|
| $140 | $140 |
| $160 | $160 | $170 |
|