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AMD Radeon R9 295X2 Review

AMD Radeon R9 295X2 8GB Review

Manufacturer: AMD
UK price (as reviewed):
Approx. £1,050 - £1,100 (inc VAT)
US price (as reviewed): MSRP $1,499 (ex Tax)

At launch, the R9 290X attracted criticism for running too hot and loud, although recent custom cooled cards have shown that it was as much to do with a poorly designed, cheap and inadequate stock cooler as much as it was to do with an inherently inefficient GPU. Even so, the idea of putting two of these toasty chips onto a single card would have seemed ludicrous to most. Recent rumours and teasers, however, began to indicate that AMD was planning exactly that. Today, we can reveal what AMD has been up to: meet the Radeon R9 295X2, appropriately codenamed Vesuvius.

*AMD Radeon R9 295X2 Review **NDA 08/04 1PM** AMD Radeon R9 295X2 Review *AMD Radeon R9 295X2 Review **NDA 08/04 1PM** AMD Radeon R9 295X2 Review
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As you can see, it's the first reference card to be water-cooled. It uses a sealed loop cooler from Asetek, with a similar design to that seen on the Asus Ares II. Like that card, it also comes in a padded flight case. Everything about it, from packaging to construction, is premium, which is no surprise – it's launching at $1500, with our sources indicating that its price will approach the £1,100 mark this side of the Atlantic. It's due to have retailer availability in the week of April 21st. Without doubt, at this price, it's reserved for a lucky few, but as enthusiasts, we still jump at the chance to look at something as gloriously over the top as this.

 AMD Radeon R9 295X2 8GBAMD Radeon R9 290X 4GBAMD Radeon R9 290 4GBAMD Radeon R9 280X 3GB
GPU
CodenameVesuviusHawaii XTHawaii ProTahiti XTL
Core ClockUp to 1,018MHzUp to 1GHzUp to 947MHzUp to 1GHz
Stream Processors2 x 2,8162,8162,5602,048
Texture Units2 x 176176160128
Rasterisers2 x 4442
Tesselation Units2 x 4442
ROPs2 x 64646432
Transistors12.4 billion6.2 billion6.2 billion4.3 billion
Die Size2 x 438mm2438mm2438mm2352mm2
Process Node28nm28nm28nm28nm
Memory
Amount2 x 4GB GDDR54GB GDDR54GB GDDR53GB GDDR5
Frequency1.25GHz (5GHz effective)1.25GHz (5GHz effective)1.25GHz (5GHz effective)1.5GHz (6GHz effective)
Interface2 x 512-bit512-bit512-bit384-bit
Bandwidth2 x 320GB/sec320GB/sec320GB/sec288GB/sec
Card Specifications
Power Connectors2 x 8-pin1 x 8-pin, 1 x 6-pin1 x 8-pin, 1 x 6-pin1 x 8-pin, 1 x 6-pin
Stock Card Length307mm278mm278mm275mm
TDP500W290W275W250W
Typical Street Price~£1,050£400£315£215

We'll start with the core hardware. Effectively, the R9 295X2 comprises two fully functional Hawaii GPUs with 44 Compute Units a piece and each with a full offering of 4GB GDDR5 (for the full lowdown on Hawaii see here). Of course, this means it will be marketed as having 5,632 cores and 8GB VRAM, but the correct way to think of it is 2 x 2,816 cores and 2 x 4GB VRAM, as the two GPUs are still functionally separate. Either way, it's obvious that there is a serious amount of firepower here. These specs also makes this card the fastest single consumer graphics card in the world, though Nvidia's GeForce GTX Titan Z is set to challenge that. As you'd expect, both TrueAudio and Mantle are fully supported.

Unusually for a dual GPU card, clock speeds aren't any less than the single card variants – in fact, they've actually been given a marginal bump. The maximum GPU clock speed is 1,018MHz compared to 1,000MHz before, while the memory runs at the same 5GHz effective. AMD claims that this, along with improved cooling (which allows the GPUs to run at maximum frequency more often) and hard work from its driver team, means it will actually be faster than two stock speed R9 290X cards running in CrossFire. AMD also claims that the best scaling will be at 4K resolutions, and freely admits that this card is overkill for 1080p and even 1440p.