AMD has been on a roll of late, with six new 7000-series graphics cards in the first quarter of this year alone. Now we’re hearing details about team red’s upcoming range-topping, dual GPU Radeon HD 7990 model, which could be here as early as next month, after Chinese website inpai.com.cn leaked the specifications.
It’s no surprise we’re hearing details about the new dual-GPU card just now, with team green’s Kepler GK-104 based GTX 680 announced earlier today. The new Nvidia offering takes the crown from AMD’s current top model, claiming the title as the fastest single-GPU graphics card available.
According to the leaked specifications, the HD 7990 will feature two Tahiti-XT 7970 graphics cores using the 28nm architecture, with 8.6-billion transistors and 4,096 processors combined, a total of 256 texture units, 64 ROPs, and a massive 6GB of GDDR5 memory shared across both of the GPUs using two 384-bit channels.
As with the previous dual-GPU release, each GPU-core will be clocked slightly lower than their respective HD 7970 models, at 850MHz (HD 7970 has 925MHz) with the frame buffer set at an effective 5,000MHz, which again is 500MHz lower per GPU-core than the HD 7970 is clocked at.
There is currently no word on the TDP wattage, or the number of power connections, though it is very likely it will employ two 8-pin sockets. There is also no news on crossfire support either, but it is safe to assume that you’ll be able to at least pair them up in crossfire, as with the previous generation HD 6990.
Whilst there is no word on pricing either, it won’t be cheap and it’s unlikely to find its way into all but the most die-hard of enthusiast’s computers. The steep cost aside, given the very positive recent reviews of the AMD Radeon HD 7970 this new dual-GPU model will pack a monstrous punch.
AMD did not respond to requests for further comment, but for now it remains to be seen whether this is a paper exercise to knock the wind out of the GTX 680’s release. Should the leaked information turn out to be correct, the new dual GPU card will hit store shelves in April.
The AMD ATI Radeon HD 6990 is a massive graphics card measuring in at 12 inches long (30cm) and weighing a little over 1kg. The heatsinks are separated by a blower fan which is positioned in-between them rather than at the end of the card. The Radeon HD 6990 has an impressively low 37-watt idle consumption. The GDDR5 memory works at 5000MHz (1.25GHz x 4) on this particular model and features a 4GB capacity.
The AMD ATI Radeon HD 7970 measures 27 cm long (10.6 in), the GPU core is clocked at 925MHz, and the GDDR5 memory operates at the same frequency of 1375MHz (5.5GHz DDR). Still, pairing that frequency with a 384-bit memory bus gives the HD 7970 264GB/s of theoretical bandwidth. The HD 7970 carries 2048 SPUs, 128 TAUs and 32 ROPs, up 33% from 1536 SPUs and 96 TAUs, it's also the first PCI Express 3.0-compatible card.
The HD 7950 has 2048 SPUs, 128 TAUs and 32 ROPs. The only other ports are on the I/O panel where you'll find a dual DL-DVI connector, a single HDMI 1.4a port, and two mini-DisplayPort 1.2 sockets. Supports a max resolution of 2560x1600 on up to 3 monitors.
The AMD ATI Radeon HD 7870 measures 24cm long (9.4 in). The GPU core is clocked at 1000MHz and the GDDR5 memory operates at 1200MHz (4.8GHz DDR), The HD 7870 carries 1280 SPUs, 80 TAUs and 32 ROPs, it also adopts the 28nm design process and is PCI Express 3.0-compatible.
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