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When the Radeon HD 7970 launched at $550, it looked similar to a in accord with substitute to the GeForce GTX 590 and Radeon HD 6990. Both dual-GPU play are measurably faster, but they're moreover $700+, power-hungry, and in the box of the 6990, embarrassingly loud. Even still, the 7970′s asking cost is still flattering steep. And that's because a card similar to the Radeon HD 7950 is such a acquire add-on to AMD's portfolio. The firm is, as of this writing, reluctant to criticism on the 7950′s expected cost tag. However, we've already run the benchmarks. We know how it stacks up to the Radeon HD 7970 and GeForce GTX 580. So, you know what we'd pay for this new board. If the aim is close, we'd be seeking for something beneath $500″perhaps $480 or $490. What creates the Radeon HD 7950 value a couple of bucks more than Nvidia's GeForce GTX 580? Well, let's have a closer look at the card itself… Update : Before publication, but after the launch coverage was finalized for general translation, AMD let us know that the Radeon HD 7950 should sell for $450. That's good next where I considered the firm would target, since its competition. Clearly, AMD is pricing the 7950 to out-value Nvidia's GeForce GTX 580 (or force its contestant to arrange downward) rsther than than exist in a cost make up tangible by the company's single-GPU flagship. Advantage: AMD. That's a Radeon HD 7970 up tip and a Radeon HD 7950 down below. In the correct light, they'd pass as twins. Physically, the Radeon HD 7950 is same to AMD's already-available Radeon HD 7970″save a specifying feature: a second six-pin auxiliary power connector. That's a revealing denote of a sub-225 W limit house power (75 W from the slot, in addition to up to 75 W from any plug). In fact, AMD rates the 7950 correct at 200 W. In comparison, the Radeon HD 7970′s power roof is 250 W, necessitating its eight- and six-pin power connectors. A 10.5″ PCB is lengthened out an extra half of an in. by a steel bottom image and cosmetic shroud. So, outline thus when you collect a chassis. This card is sincerely long. As with the Radeon HD 7970, AMD employs a centrifugal air blower mounted on a finish of the Radeon HD 7950, that blows opposite the length of the card and exhausts exhilarated air out the back of your chassis. This is the pattern you prefer. It wasn't probable to cold the Radeon HD 6990 or GeForce GTX 590 the same way. In both examples, a center-mounted air blower tired a few air from a back I/O container and all else was recirculated. Because it relies on efficient exhaust, a of the card's two slots is grated for unconstrained air flow. The other container is populated with 4 manifestation outputs: a dual-link DVI connector, a full-sized HDMI port, and a span of mini-DisplayPort outputs . Board allies will roughly of course gold a accumulation of adapters, so be certain you're getting the components you need before creation a purchase. The two Sapphire Radeon HD 7970s you paid for came with DVI-to-VGA, mini-DisplayPort-to-DisplayPort, mini-DisplayPort-to-single-link DVI, and HDMI-to-DVI adapters. Meanwhile, the XFX R7950 Black Edition card you received usually enclosed an HDMI-to-DVI adapter. More notable, though, is that all 4 outputs may be active at the same time, ancillary endless manifestation configurations that you simply cannot accomplish on a singular Nvidia-based board. Radeon HD 7950 centers on the same 4.31 billion-transistor Tahiti GPU as AMD's faster, more costly flagship, made on TSMC's 28 nm node. However, instead of sporting 32 Compute Units, this scaled-back model comes versed with 28 Compute Units . As you know, any CU plays horde to 4 Vector Units, any with 16 shaders, ALUs, Stream Processors, or whatever else you'd similar to to call them. That's a complete of 64 SPs per CU. A rapid small computation (64*28) gives you a splendid complete of 1792 SPs on this chip. And because any of those 4 omitted CUs moreover enclosed 4 hardness units, that selection drops from 128 to 112. To help tell apart the Radeon HD 7950 even further, AMD dials back its core timepiece rate to 800 MHz (down from 925 MHz on the anxiety Radeon HD 7970). Peak discriminate opening together drops to 2.87 TFLOPS from 3.79 TFLOPS. The describe back-ends are eccentric of the CUs, and AMD leaves all 8 ROP partitions enabled , agreeable up to 32 raster operations per timepiece cycle. Six 64-bit mental recall controllers feed the partitions by a crossbar. An aggregate 384-bit information trail populated with 3 GB of GDDR5 mental recall working at 1250 MHz adds up to 240 GB/s of bandwidth. That's a slight tumble from the Radeon HD 7970′s 264 GB/s, but still a really significant enlarge over the Radeon HD 6970.  Comments | |||
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Friday, February 10, 2012
Radeon | AMD Radeon HD 7950 Review: Up Against GeForce GTX ...
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