AMD has launched the new mid-range card Radeon HD 6790. We presented detailed specification already weeks ago and when AMD now releases the new mid-range card we see that most match previous stories and performance is on par with NVIDIA’s newcomer GTX 550 Ti.
Radeon HD 6790 is despite its name based on the same Barts GPU as big brothers of the Radeon HD 6800 family and the earlier specifications that we presented matched perfectly, one thing aside. Even if AMD has maintained all four memory controllers for a bus width at 256-bit it has closed off half of the ROPs, from 32 in Radeon HD 6800 to 16 in Radeon HD 6790.
This way AMD has a card that is a lot more like Radeon HD 5770 that we previously thought and even if the power consumption is rated 150W, the card stays way below that most of the time, which we revealed a while back.
| HD 6790 | HD 6850 | HD 6870 | |
| GPU | Barts LE | Barts Pro | Barts XT |
| Node | 40nm | 40nm | 40nm |
| Die size |
255 mm2 | 255 mm2 | 255 mm2 |
| Transistors | 1.7 billion | 1.7 billion | 1.7 billion |
| SM units |
10 |
12 | 14 |
| Stream processors | 800 | 960 | 1120 |
| GPU frequency |
840 MHz | 775 MHz | 900 MHz |
| FLOPS | 1,34 TFLOPs | 1,5 TFLOPs | 2,0 TFLOPs |
| Texture units |
40 |
48 | 56 |
| Texture fillrate | 33,6 Gtexel/s | 37,2 Gtexel/s | 50,4 Gtexel/s |
| ROP units |
16 |
32 | 32 |
| Memory type |
GDDR5 | GDDR5 | GDDR5 |
| Memory buffer: | 1GB | 1GB | 1GB |
| Memory frequency |
1 050 MHz (4 200MHz) |
1 000 MHz (4 000MHz) |
1 050 MHz (4 200MHz) |
| Bus width |
256-bit | 256-bit | 256-bit |
| Bandwidth |
134,4 GB/s | 128 GB/s | 134,4 GB/s |
| Power connectors |
2 x 6-pin | 1 x 6-pin | 2 x 6-pin |
| Power consumption |
19/150W (Lower at reads) | 19/129W | 19/151W |
Radeon HD 6790 looks like a more powerful card than closest competitor GTX 550 Ti, like NVIDIA’s card AMD has set a high starting price where even Radeon HD 6850 become a very interesting alternative after steady price cuts.
More information on AMD’s new mid-range card can be found in the reviews below;
