Physically, the Radeon HD 7950 is identical to AMD’s already-available Radeon HD 7970—save one distinguishing feature: a second six-pin auxiliary power connector. That’s a telltale indication of a sub-225 W maximum board power (75 W from the slot, plus up to 75 W from each plug). In fact, AMD rates the 7950 right at 200 W. In comparison, the Radeon HD 7970’s power ceiling is 250 W, necessitating its eight- and six-pin power connectors.
A 10.5” PCB is extended out an additional half of an inch by a metal base plate and plastic shroud. So, plan accordingly when you pick a chassis. This card is fairly long. As with the Radeon HD 7970, AMD employs a centrifugal fan mounted on one end of the Radeon HD 7950, which blows across the length of the card and exhausts heated air out the back of your chassis. This is the design we prefer. It wasn’t possible to cool the Radeon HD 6990 or GeForce GTX 590 the same way. In both examples, a center-mounted fan exhausted some air from a rear I/O slot and everything else was recirculated.
A 10.5” PCB is extended out an additional half of an inch by a metal base plate and plastic shroud. So, plan accordingly when you pick a chassis. This card is fairly long. As with the Radeon HD 7970, AMD employs a centrifugal fan mounted on one end of the Radeon HD 7950, which blows across the length of the card and exhausts heated air out the back of your chassis. This is the design we prefer. It wasn’t possible to cool the Radeon HD 6990 or GeForce GTX 590 the same way. In both examples, a center-mounted fan exhausted some air from a rear I/O slot and everything else was recirculated.
| AMD GPU Specification Comparison | ||||||
| AMD Radeon HD 7970 | AMD Radeon HD 7950 | AMD Radeon HD 6970 | AMD Radeon HD 6950 | |||
| Stream Processors | 2048 | 1792 | 1536 | 1408 | ||
| Texture Units | 128 | 112 | 96 | 88 | ||
| ROPs | 32 | 32 | 32 | 32 | ||
| Core Clock | 925MHz | 800MHz | 880MHz | 800MHz | ||
| Memory Clock | 1.375GHz (5.5GHz effective) GDDR5 | 1.25GHz (5GHz effective) GDDR5 | 1.375GHz (5.5GHz effective) GDDR5 | 1.25GHz (5GHz effective) GDDR5 | ||
| Memory Bus Width | 384-bit | 384-bit | 256-bit | 256-bit | ||
| Frame Buffer | 3GB | 3GB | 2GB | 2GB | ||
| FP64 | 1/4 | 1/4 | 1/4 | N/A | ||
| Transistor Count | 4.31B | 4.31B | 2.64B | 2.64B | ||
| Manufacturing Process | TSMC 28nm | TSMC 28nm | TSMC 40nm | TSMC 40nm | ||
| Price Point | $549 | $449 | $350 | $250 | ||
More Reviews : Tom's Hardware
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