The Asus EAHD4870X2 card uses AMD’s standard ATI Radeon design. The Radeon HD4870X2 has two graphics chips on a single PCI Express graphics card. It has 2GB of DDR 5 video memory and a faster clock speed. The chips are products of a 55-nanometer manufacturing process.

Radeon EAHD4870X2 has a built-in audio processing capability. The card’s HDMI port can be used to pipe out digital audio, via an included DVI-to-HDMI adapter. The card can run all the new features in Windows Vista, including the forthcoming DirectX 10. The core clock speed is 750 MHz while the memory clock speed is 3.6GHz. The card is compatible with the new depiction features of DirectX 10.

The features include ASUS GamerOSD, ATI CrossFireX technology, ASUS Video security online and ASUS Splendid video enhancing technology. The card is HDCP and Windows 7 compatible.

EVGA's GeForce GTX 9800+ Super clocked edition has basically the same price-performance benefit as its Radeon HD 4850-based graphics card competition. With identical bang-for-the-buck, the main reason of liking this card is demand power efficiency, but you should turn to ATI's card if your PC has limited upgrade room. Manufacturer of EVGA Sold individually Products features of NVIDIA unified architecture with full Microsoft DirectX 10NVIDIA SLI ready to use. NVIDIA Pure Video HD technology PCI Express 2.0 supporting Two dual-link DVI, and one HDTV Dual-link HDCP capable OpenGL 2.1.

NVIDIA’s GeForce GTX 9800 added with chip debuted was last July for around $230. In this "Super clocked" design from EVGA, NVIDIA’s chip has its unique core clock speed boosted to 756MHz, from its stock 738MHz setting. This chip was supposed to be NVIDIA’s Radeon HD 4850-killer, but as report says on charts, that even this over clocked model only barely outperforms its competition. Its additional features includes   NVIDIA PhysX-Ready , NVIDIA Lumenex Engine , NVIDIA 3-way SLI ready , NVIDIA CUDA technology , NVIDIA Gig Thread technology , NVIDIA Pure Video HD technology , NVIDIA SLI Multi-GPU Technology , Digital Vibrancy Control (DVC) Technology.

Vega’s Super clocked edition of NVIDIA’s GeForce GTX 9800+ is a fast 3D graphics card It expectation concludes to play most current PC games at smooth frame rates, especially on lower resolutions and those with limited upgrade room might consider the comparable card from ATI, the Radeon HD 4850 that unlike the double-wide GeForce GTX 9800+, requires only a single expansion slot Otherwise, there is difference between these two cards, in price, power consumption, and speed which are negligible.

Each vendor also claims for a handful of advanced features for its graphics technology in general. PhysX game physics supporting NVIDIA, and both Havoc Physics and DirectX 10.1 which supportsATI. With few games that take advantage of  vendors features in a compelling way that far, which claims superiority with its extras. Each card can also be connected to an HDTV over a DVI-to-HDMI adapter, but, as always with this generation of graphics chips, NVIDIA requires to connect graphic card directly into your audio output to send sound over the HDMI connection. Thus by including the onboard audio processor, ATI has eliminated that intermediary step and the single slot may be enough to sway home theater enthusiasts away from the GeForce card.

The GeForce GTX 295 graphics card with CUDA technology deals not only with providing a world-class gaming experience, but it also delivers Graphics Plus. An experience can be done of jaw-dropping PhysX gaming effects, stereoscopic 3D, and lightning fast video and image processing all accelerated by the GPU.Somewhat it experiences a new world of realistic physical motion and massively destructible environments, strapping on NVIDIA GeForce 3D Vision glasses to game in true stereoscopic 3D, trans coding HD videos in minutes with portable video player, or rapidly editing digital images using Adobe CS4, the GeForce GTX 295 graphics card does it all with mind blowing performance.

Officially launched at CES, the GTX 295 is NVIDIA’s latest top end graphics card and, as that preamble have suggested, about its uses two GTX 280 chips working together in a single card (just like SLI but on one card) to theoretically hand the competition its own proverbial. In fact, the GTX 295 is quite two fully-fledged GTX 280s in relation with the clock speeds of the two chips which have been lowered to the same as that of the GTX 260. Basically, the two cores operate at 576MHz with the shader clock set to 1,242MHz. Memory speed has also been reduced to 1,998MHz as well as these speed reductions the other secret to enabling the GTX 295 to exist the shrink in manufacturing process. The normal GTX 280 had been manufactured using a 65nm process, but the chips used in the GTX 295 use a smaller 55nm process. This seems that small reduction has a large cumulative affect on the overall power and heat output of the chip, enabling NVIDIA to fit the same computing power in a smaller thermal envelope than would otherwise be possible.

Discussing  regarding prices which are going to get tricky for the next few weeks considering GeForce GTX 295 boards have started to appear on retailers immediately at ~$500 and price drops from competing products have followed accordingly. The Radeon HD 4870 X2 seems to be selling for ~$450 making it roughly the same as buying a pair of Radeon HD 4870 1GB cards. GeForce GTX 280 pricing, on the other hand, it has dropped dramatically from the $450-500 range a few weeks ago to less than $350 making for quite a bargain. This heavy drop may be in favor of its replacement, the slightly speed bumped GeForce GTX 285, with a 55nm process causing an expectation to run cooler and over clock better. These cards have yet been available though, and the discounts for GTX 280 cards may be a strategy to deplete inventory as quickly as possible.

In today’s world of cut throat competition every other corporation is trying extensively hard to develop technologies better than other. In this race of RAM development, there is extreme competition for introduction of world’s fastest memory for multimedia applications. There are introduction of many fast memory types –

• XDR – XDR is a Rambus-developed technology that moves the data at 8 bits per clock cycle. The data rate in this case is 8GB/sec. The data rate of DD2-400 is 0.8GB/sec, and this shows that XDR is ten times faster than DD2-400.

In fact this is not it but there is still more to come. XDR 512Mbit module with data rate of 12.8GB/sec is poised to enter the market soon. According to Rambus, XDR can support from 3.2 up to 8GHz clock rates.
In XDR the component modules present in the chip uses point-to-point connections to the memory controller, as compared to sharing of multi-drop wire-in case of DDR modules. This is the main reason of XDR being faster than DDR. According to IDC, by next year, global XDR DRAM shipments will exceed 800 million 256Mbit equivalent units. This is looking like a XDR generation after DDR3 DRAM. But there is a valid point that DDR module types are open standards whereas XDR is a Rambus technology proprietary.

• DDR3 – Samsung has claimed the first DDR chip. DDR3, (Double Data Rate 3) Dram has a capacity of 512 MB and can process data at up to 1.06Gbit/s. the main type of DRAM found in most PCs is DDR SDRAM. DRAM is the main memory type used in PCs and servers. Hence it is a known fact that faster the memory, more smoothly the computers will work.

The chip runs at 1.5 volts as compared to 1.8 volts for DDR2, as a result there is less heat generation and also less power requirements, and also enhances the battery life. IDC market research claims that by next year DDR3 will account for more than 65% of the memory market.

• DDR2 – DDR2 offers double speed as that of DDR. This is because DDR has a 2-bit pre-fetch ability whereas the DDR2 has a 4-bit pre-fetch ability. But this not at all means that there is a faster clockspeed though. DDR2 have terminating transistors which ratchet up the signal quality and also eliminate signal noise, placed on the chip itself. There are 240 pins in DDR2 DIMM.

The first DDR2 chips were produced by Samsung in 2001 which ran a lower internal clock speed than equivalent data rate DDR chips. But in this case the 4-bit pre-fetch meant that the effective memory was the same, which reflects that DDR2-400 was as fast as DDR400.this also gives that the data rate is four times the clock rate. Other DDR2 speeds available were 533, 667, 800 and 1200MHz. the DDR2 module has a data rate of 0.8GB/sec.
The DDR2 module capacities are available in following -256Mbit, through 512, 1Gbit and up to 4Gbit.