DangerDen recently announced the worldwide availability of DD-7970, its performance water-block for AMD Radeon HD 7970 (reference design PCBs). The DD-7970 is designed to provide coverage to all hot components on the obverse side of the PCB, including the 28 nm "Tahiti" GPU, 12 GDDR5 memory chips, and the VRM. Its coolant channel passes through the portion of the VRM, the portion over the GPU is ridged to increase surface area of dissipation. Options for the top include clear polycarbonate, and satin-finished copper. The polycarbonate top variant weighs 3 lbs, while the satin-finished copper variant weighs 4 lbs. Both are priced at US $114.95, available through DangerDen's online store.

When we saw glimpses of Sapphire Radeon HD 7970 Toxic 6 GB graphics card, we knew Sapphire was prioritizing on aesthetics a lot. That turns out to be the case, as the first pictures of this monstrosity reveal. The PCB and cooler are designed from scratch, by Sapphire. The PCB accommodates 6 GB of memory in 24 GDDR5 memory chips, 12 on each side. To power the factory-overclocked 28 nm "Tahiti" GPU and 24 GDDR5 7 GT/s memory chips takes some really strong VRM. Sapphire implemented an 8+3 phase power supply, that makes use of solid-state chokes (don't whine under stress), and International Rectifier DirectFETs. The VRM draws power from two 8-pin PCIe power connectors.More details, and a benchmark follow.

In anticipation of the official launch, PowerColor has served up a fresh batch of pictures depicting its Radeon HD 7970 Vortex II Edition graphics card. Besides providing fresh photos, PowerColor has also confirmed that this new Tahiti-powered card will have its GPU set to 1100 MHz (up from the stock 925 MHz) and the 3 GB of on-board GDDR5 memory clocked at 5700 MHz (5500 MHz stock).

In addition to higher clocks, the HD7970 Vortex II features a dual-slot cooler with two fans (allowing for a little airflow adjustment) and three heatpipes, a backplate to speed up heat dissipation, 2048 Stream Processors, a 384-bit memory interface, a PCI Express 3.0 x16 bus interface, CrossFireX and Eyefinity support, and five display outputs (DVI x 2, HDMI x 1, mini DisplayPort x 2).

The HD7970 Vortex II Edition is expected to become available next month. Its price tag is still unknown.

Closely trailing the launch of NVIDIA's GeForce GTX 680, and keeping up with its own streak of launching a new graphics card line each month since January, AMD will unveil its Radeon HD 7990 graphics card in April, or so it's reported. INPAI reports the clock-speed and chip-configuration of the upcoming dual-GPU monstrosity. The Radeon HD 7990 packs two 28 nm "Tahiti" GPUs as a "Crossfire on a stick" solution. The Tahiti chips will be clocked at 850 MHz (core), and 1250 MHz (5.00 GHz effective) memory.

The chip-configuration of each of the two Tahiti chips will be the same as that on the Radeon HD 7970, with 2048 Graphics CoreNext stream processors, 128 TMUs, 32 ROPs, and 384-bit wide GDDR5 memory interface, holding 3 GB of memory, each. The total memory on the card will hence be 6 GB. With the Radeon HD 7970 refusing to budge from its US $549 price-point, it's quite natural that the Radeon HD 7990 will be priced very high. It is gunning to retain the performance crown that's currently disputed between the Radeon HD 6990 and GeForce GTX 590.

A part of the reason why NVIDIA's performance-segment GK104 is gunning for the performance crown from AMD's Tahiti GPU could be hidden behind two of its key specifications: transistor count, and die-size. 3DCenter.org compiled these two specifications for the GK104 from reliable sources, which pin the transistor count at 3.54 billion, and die-area at 294 mm². This yields a transistor density of 12 million per mm², which is slightly higher than that of AMD Tahiti, slightly lower than that of AMD Pitcairn, and certainly higher than previous-generation chips from both AMD and NVIDIA. If GeForce GTX 680 does in fact end up competitive with AMD's Radeon HD 7900 series, it could serve as a tell-tale sign of NVIDIA's Kepler architecture being a more efficient one.

A report by 3DCenter.org, which takes into account the specifications of NVIDIA's GK104 GPU, based on clock-speed and specs. leak estimated its shader compute power to be 17% higher than that of AMD's Tahiti in its Radeon HD 7970 avatar (4.46 TFLOPs single-precision floating point). Based on the said specifications, the report also hypothesized things such as memory bandwidth, ROP performance, and texture performance; and compared it to those of the Radeon HD 7970 and Radeon HD 7950.

Thanks to some good understanding of geometry, and great Photoshop skills, the punters have estimated the die-size of NVIDIA's GeForce Kepler 104 (GK104) GPU, using a picture of the NVIDIA reference board that was leaked last week. Compared to the known die-size of an AMD "Tahiti"-based graphics card, the die-size of GK104 was estimated to be around 320 mm², about 45 mm² smaller than Tahiti. The relative transistor density of the chip, compared to AMD's 28 nm chips, were also estimated.

Teased by its maker earlier this month, the PowerColor Radeon HD 7970 LCS (Liquid Cooling System) Edition graphics card has found its way onto Overclockers UK's website where it can be found on pre-order priced at £599.99 (~ $951 / ~ 718 Euro).

PowerColor's new, Tahiti-powered card comes equipped with a single-slot EK Nickel Acetal waterblock and features a core clock of 1050 MHz (up from the stock 925 MHz), 2048 Stream Processors, a 384-bit memory interface, 3 GB of GDDR5 VRAM set to 5700 MHz (5500 MHz stock), PCI-Express 3.0, DirectX 11.1 and OpenGL 4.2 support, CrossFireX and Eyefinity capabilities, and four display outputs - one dual-link DVI, one HDMI and two mini DisplayPorts.

The Radeon HD 7970 LCS is backed by a two-year warranty and should start shipping before the end of this month.

The launch of AMD's Radeon 7800 series is on course for March, as AMD wants to complete the launches of the entire Radeon 7000 series before NVIDIA even has its first GPU out. Radeon HD 7800 will be designed to occupy key price points in the sub-$300 market segment, where it strikes price-performance sweetspots for gamers. Central to this series is a new 28 nm GPU, codenamed "Pitcairn", from which will be derived three SKUs: the Radeon HD 7870, Radeon HD 7850 2 GB, and Radeon HD 7850 1 GB. The specifications look like this:

Radeon HD 7850

• 20 Graphics CoreNext Compute Units, 1280 stream processors
• 80 TMUs, 24 ROPs (de-linked from the memory bus, of course)
• 256-bit wide GDDR5 memory interface, 2 GB and 1 GB variants
• Clock speeds of 900 MHz core, 1250 MHz (5.00 GHz effective) memory

Radeon HD 7870 specifications follow.

A leading brand of graphics card maker - VTX3D, today introduces the most well-known X series of VTX3D, HD7970/HD7950 X Edition. The X series is designed to deliver extraordinary performance with factory overclocked setting and unique cooling design.

VTX3D HD7970/HD7950 X Edition incorporates the latest PCI-E Gen 3 to get the maximum performance from your GPU. Both fitted with 3 GB of GDDR5 memory connected via a new high speed 384 bit memory interface. VTX3D HD7970/HD7950 X Edition is clocked at 1050 MHz and 880 MHz respectively, also together with 1425 MHz and 1250 MHz for each memory, fulfilling those who thirst for extreme performance. The HD7970/HD7950 X Edition also features ultra cooling design. With two 92 mm ultra big fan and SSU-shape heat pipe design, this efficient cooling solution maximizes the speed of heat dissipation, but minimizes the noisy level, creating most pleasing environment for gaming.

Ushering the finest and most capable graphics card based on new AMD "Tahiti" 28nm GPUs, the ASUS HD 7970 DirectCU II TOP uses a factory-overclocked core and 3 GB of GDDR5. It is cooled by the exclusive DirectCU II, a dual fan thermal design with six copper heatpipes and a large dissipation area that leads to the lowest temperatures and quietest operation of any HD 7970 card.

ASUS DIGI+ VRM 12-phase digital power delivery comes to graphics cards improved with Super Alloy Power components, while overclockers are bound to appreciate the inclusion of exclusive VGA Hotwire hardware overvolting and GPU Tweak software tuning. The new cards further support adapter-free AMD Eyefinity 6.

AMD launched the Radeon HD 7950 graphics card, its second high-end product based on its new Graphics CoreNext architecture. Based on the same 28 nm "Tahiti" silicon as the HD 7970, the new SKU packs all its features, while being a tone-down in terms of specifications. To begin with, it features 1792 stream processors brought about by enabling 28 out of 32 of the GCN compute units on Tahiti. It features 112 TMUs, 32 ROPs, and a 384-bit wide GDDR5 memory interface, holding 3 GB of memory.

Its reference clock speeds include 800 MHz core, and 1250 MHz (5.00 GHz GDDR5 effective). Due to reduced power draw, the card requires two 6-pin power inputs, instead of 6+8-pin found on the HD 7970. AIB partners are free to provide custom-design and factory-overclocked models at speeds of up to 900 MHz core with 5.00 GHz memory. Models with AMD reference clock speeds should be typically priced at US $449, with factory-overclocked ones about $15-20 higher. The cards should be available in the markets right away.

Here is the first GPU-Z screenshot of a Radeon HD 7950 graphics card. Although put into a screenshot with ASUS GPU Tweak tool and Republic of Gamers-themed GPU-Z, the card doesn't appear to be an ASUS-made one, and is more likely HIS or PowerColor. The device ID checks out with the one HD 7950 has been associated with. Most other features match expectations. The HD 7950 is carved out of the 28 nm "Tahiti" GPU, with 28 GCN compute units (CUs) active, totaling 1,792 stream processors and 112 TMUs. The ROP count is untouched at 32, so is the memory, that's 3 GB GDDR5 across a 384-bit wide memory interface. With a memory clock of 5.00 GHz effective, it's churning out 240 GB/s of memory bandwidth. It's just the core clock speed where we weren't on target (from the previously-expected 800 MHz), either 880 MHz is the reference core clock speed of HD 7950, or this particular card is a factory-OC variant (PowerColor HD 7950 PCS?).

This month-end, AMD will launch the second product in its high-end Radeon HD 7900 series, the HD 7950, which is based on the same "Tahiti" silicon as the HD 7970, but with a few components disabled. Reliable sources revealed to DonanimHaber the reference clock speeds of the HD 7950. The core of the HD 7950 will be clocked at 800 MHz, and the memory at 1250 MHz (actual), 5.00 GHz (GDDR5 effective). This, compared to the 925 MHz (core), 1375 MHz (memory actual)/ 5.50 GHz (memory effective) clock speeds of the HD 7970. The HD 7950 will hence be a good overclocker considering the speeds it comes with, there is scope for quite a few factory-OC models from AIBs. In related news, DonanimHaber notes that the HD 7950 on average will be US $100-150 cheaper than the HD 7970 (US $400-$450).

After showing to the world its Radeon HD 7970 PCB with all components placed, Yeston disclosed pictures of exactly what it's going to use to cool the beast. Yeston's cooling solution uses two big (probably 120 mm) fans inspired by the design of aircraft turbofans, with 18 blades on its impeller. Such impellers with PC cooling fans aren't new, and have been used in case fans designed by the likes of Cooler Master. However, this could be the first time such fans have been used in a VGA cooler.

Underneath the frame holding the two fans is a large aluminum fin stack-type heatsink that spans almost the entire area of the PCB. A copper base makes contact with the GPU, from it, six copper heat pipes originate, conveying heat to two aluminum fin stacks, which are then ventilated by the two fans. When fully assembled, the cooler is so large that it appears to span across almost four expansion slots. Yeston is reportedly still working on improving the design. Let's hope it gets a lot slimmer than that.

Chinese AMD Radeon add-in board (AIB) partner and motherboard major Yeston, displayed a Radeon HD 7970 PCB, which bears the AMD branding, and is reportedly AMD's cost-effective "Tahiti" PCB. It is quite likely that this PCB will be used for Radeon HD 7950, apart from affordable HD 7970 cards. Radeon HD 7950, like its costlier sibling, will have a 384-bit wide GDDR5 memory interface.

Its designers seems to have done some clever cost-cutting which will make cards based on it more affordable (or at least more profitable), without sacrificing quality much. The PCB uses a 8+1+1 phase VRM, consisting of cost-effective ferrite core chokes, LFPAK MOSFETs, and probably a UPI-made VRM controller. Yeston will most likely use a top-flow cooler, and hence made room for two DVI connectors next to one each of HDMI 1.4a and standard DisplayPort 1.2. The dual-BIOS feature of AMD's high-end reference HD 7970 PCB is blanked out on this PCB.

Originally slated for 9th January, and reportedly delayed to February, AMD's second high-end graphics card based on the Tahiti silicon, the Radeon HD 7950 will make it for a late-January launch, sources within add-in board (AIB) partners told DigiTimes. Previous reports mentioned that Radeon HD 7950, when it is launched, will be accompanied with market-availability. In related news, while all Radeon HD 7000M mobile GPUs launched by AMD so far are rebrands from previous generations, it does have designs of 28 nm mobile GPUs based on its new Graphics CoreNext (GCN) architecture in the pipeline, which will take up Radeon HD 7900M/7800M/7700M series, which will be launched in Q2, 2012.

PowerColor is designing a non-reference Radeon HD 7970 graphics card, complete with its own PCB and cooler designs. For the cooler, PowerColor is designing an updated version of its Vortex II cooler featured on some of its older high-end graphics cards based on Radeon HD 6900 series GPUs. The cooler design is your typical aluminum fin-stack heatsink to which heat is fed by four 8 mm thick nickel-plated copper heat pipes. Ventilation is handled by two 80 mm fans, the frames of these fans are threaded and can be twisted to adjust the distance between the fan and the heatsink, adjusting its air-flow.

PowerColor also has a custom-design PCB to go with it, only the prototype pictured has no Tahiti GPU sitting on it, but PowerColor at least has a board design of its own at hand. The PCB draws power from two 8-pin PCIe power connectors, a CHIL-made controller handles voltage regulation. The VRM consists of a 9+1 phase design with a few other miscellaneous power domains. Those chokes appear to be slightly more cost-effective compared to the CPL-made ones featured on AMD's reference PCB. IR directFETs are replaced by cost-effective yet durable DrMOS chips.

Over the past few days, we were hearing rumors from many quarters that AMD's "Tahiti" high-performance GPU may have been a deviation from an older specification, and that it really has 2304 stream processors spread across 40 GCN compute units (CUs), instead of the 32 the Radeon HD 7970 ended up with. Both AMD and NVIDIA create more redundant components on their chips than their SKUs end up getting, so they could increase yields, it's a process commonly known as "harvesting".

On Tuesday, AMD quashed the rumor in an e-mail to Bright Side of News, in which it said that Tahiti XT (Radeon HD 7970) makes use of all the CUs there are, on the chip. The 40 CU / 2308 SP rumor gained some weight with the fact that since AMD is venturing into unknown territory (TSMC's 28 nm process, built after quite some delays and failures), it could do some heavy harvesting. Examples of harvesting in recent past include Intel Sandy Bridge-E Core i7 processors, which use only up to 6 out of 8 cores on the silicon, and only up to 15 MB out of 20 MB available on it; and GeForce GTX 480, which used only 480 out of 512 CUDA cores available on the GF100 GPU.

On the 22nd of December, 2011, AMD paper-launched its Radeon HD 7970. By all measures, it appears like when the card hits retail availability on the 9th of this month, AMD will have a winning product at hand, for the price-segment it's targeting with that. According to latest reports, a leaked confidential email of AMD sourced by Guru3D (now redacted) says that AMD wants to launch Radeon HD 7950 on the same day of its retail availability, which happens to be in the first week of February, 2012. So no Radeon HD 7950 on the 9th of January, as we were earlier told about. The Radeon HD 7950 will be an important SKU for AMD, as it's more affordable than the $550 HD 7970.

Last Thursday, AMD launched the Radeon HD 7970 graphics card based on its new 28 nm "Tahiti" silicon, but it remained tight-lipped about the specifications of the more important SKU that will be based on it, the Radeon HD 7950. The HD 7970 will carry a launch price of US $550, making the HD 7950 an SKU to watch out for. According to details released by XTReview, the "Tahiti Pro" or HD 7950 will be carved out this way:

• 1792 stream processors, 28 GCN compute units
• 112 TMUs, 32 ROPs (derived)
• 384-bit GDDR5 memory interface
• 3 GB memory, memory clock around 5.00 GHz

The core clock speed, the exact memory clock speed, and more importantly, the target price-point, remain unknown. The Radeon HD 7950 is expected to be launched on the 9th of January.

Even 12 months ago, an Intel Nehalem-powered gaming PC with 6 GB of system memory was considered high-end. Now there's already talk of a graphics card taking shape, that has that much memory. On Thursday this week, AMD launched its Radeon HD 7970 graphics card, which features its newest 28 nm "Tahiti" GPU, and 3 GB of GDDR5 memory across a 384-bit wide memory interface. All along, it had plans of making a dual-GPU graphics card that made use of two of these GPUs to give you a Crossfire-on-a-stick solution. AMD codenamed this product "New Zealand". We are now getting to learn that codename "New Zealand" will carry the intuitive-sounding market name Radeon HD 7990, and that it is headed for a Q1 2012 launch.

This means that Radeon HD 7990 should arrive before April 2012. Tests show that Tahiti has superior energy-efficiency compared to previous-generation "Cayman" GPU, even as it has increased performance. From a technical standpoint, a graphics card featuring two of these Tahiti GPUs, running with specifications matching those of the single-GPU HD 7970, looks workable. Hence, there is talk of 6 GB of total graphics memory (3 GB per GPU system).

A little earlier today, we showed you pictures of AMD's first Radeon HD 7900 series single-GPU PCB that makes use of digital-PWM power delivery. Some of the first batches of Radeon HD 7900 graphics cards will stick to that PCB and board design, as it's backed by AMD's engineering. Even as the SKU's launch is less than 24 hours away, there are pictures of AMD's cost-effective Radeon HD 7900 PCB surfacing on Asian media sites. Once ready, AMD add-in board partners can opt for this cost-effective PCB if they want to fine-tune their prices. It looks like AMD is ready well ahead to face competition from NVIDIA, with its GeForce Kepler 104 (GK104) GPU.

The cost-effective PCB, without any components laid, is pictured below. The first picture shows its obverse side, the second, its reverse side. The PCB is completely up to speed with everything Tahiti GPU will need. It has provision for two 8-pin PCIe power inputs, an 8+2 phase cost-effective analog VRM, probably driven by a cost-effective CHIL controller, and a different display output connector loadout. It has provision for two DVI, and one each of HDMI and full-size DisplayPort. Partners can still use a single DVI connector, and keep their cards single-slot capable. Provisions for 12 GDDR5 chips are right where they should be. There is nothing eventful in the reverse side, just traces for all the supportive components.

We've already been through the specifications of HD 7970 "Tahiti" in some detail that matters to those who can draw a performance hunch looking at them. This latest slide shows you the feature-set this GPU comes with. To begin with, there are three main categories of feature updates: Graphics CoreNext, AMD Eyefinity 2.0, and AMD APP Acceleration. AMD claims CoreNext to be a "revolutionary" new architecture that changes the way the GPU crunches numbers.

For the past five generations (since Radeon HD 2000), AMD GPUs have used the VLIW (very-long instruction word) core arrangement. Even the latest VLIW4 introduced by Radeon HD 6900 series, was an evolution, than a revolution of that. CoreNext replaces VLIW stream processors with super-scalar Graphics Compute cores. This should translate to higher performance per mm² die-area, resulting in smaller GPUs, giving AMD room for greater cost-cutting if the competition from NVIDIA for this generation takes effect. The GPU itself is built on TSMC's new 28 nm silicon fabrication process. Next up, AMD confirmed support for PCI-Express 3.0 interface, that nearly doubles system bus bandwidth over the previous generation.

AMD Radeon HD 7970 launch is just around the corner. Ahead of its launch, AMD conducted its usual press briefing. DonanimHaber has access to some of the slides shown in that meeting. Earlier this day, we brought you perhaps the most important of them all, specifications. Let's take a look at the reference board design itself. AMD is sticking to the black+red colour scheme, and has come up with a swanky new cooling assembly design. The design, unlike those of higher-end Radeon HD 6000 series graphics cards, is surprisingly curvy and features dashes of red plastic making up its contours, surrounded by tougher black ABS.

A welcome change here from the previous generations, is that the card is truly single-slot capable, when say, a single-slot full-coverage water block is used. High-end cards from previous generation HD 5000 and HD 6000 have a dual DVI connector cluster that extends into two expansion slots, which many enthusiasts found to be annoying, especially when setting up benches with four single-GPU graphics cards in scenarios where PCI-Express slot spacing isn't kind. Moving on to display connectivity, the card has one DVI, one HDMI, and two mini-DisplayPort connectors, all arranged in the confines of a single expansion slot. The space of the second slot is dedicated to a hot-air exhaust of the cooling assembly. All board partners are required to ship HDMI-to-DVI dongles, and active mini-DP dongles.