ATI 4770

[inFamous91]

ATI RADEON HD 4770 ***

 

Expected Price : 5k 0r 6k

 

 

 

The HD 4770 is the poster boy for the changing face of ATI. They have forgone the push for a power-hungry monolithic architecture and have instead focused their energies on scalable, more compact GPU cores which can be used for multiple cards in various price ranges. This was first accomplished with the 55nm HD 4800-series and later perfected with the lower end HD 4600 series and more recently the HD 4890 1GB. As technology has progressed, so too has ATI’s shift towards a more price and efficiency-conscious manufacturing processes. While Nvidia has had some serious issues moving from 65nm to 55nm, with the HD 4770 ATI has now gone directly to the use of 40nm chips. What this means for power consumption has yet to be seen but what we can tell you is that a smaller manufacturing process could conceivably allow ATI more pricing flexibility in the long run due to lower production costs. That should translate into a better pricing structure.

 

The HD 4770 with its GDDR5 memory should change the pricing scheme quite a bit since it should outperform the 9800 GT by a relatively wide margin

 

Specifications and Features

 

 

The RV740 is 312 million transistors more complex than the RV730. As a result, it has twice the computing capacity (640 ALUs against 320 ALUs) and twice the rasterization performance (16 RBEs against 8 RBEs). On the other hand, the new chip is 130 million transistors simpler than the RV770. Considering that the graphics cores of the Radeon HD 4830 and Radeon HD 4770 have the same configuration (640 ALUs, 32 TMUs, 16 RBEs), we can calculate the theoretical cost of the two disabled SIMD modules of the former. Easy to see, 160 ALUs (32 superscalar processors) and 8 texture processors take 130 million transistors, and one such module takes 65 million transistors.

 

The RV740 has eight SIMD modules, so the total amount of transistors for the computing and texture resources of the RV740 is 520 million. For the RV770 with its 10 SIMD modules the number is 650 million transistors. Thus, there is 306 million transistors left for each GPU. They are used to implement the rest of the GPU subunits: RBEs with memory controllers, task scheduler, PCIe interface, display controllers, UVD video processor and HDMI audio core.

 

Just like with Radeon HD 4890, the first batch of RV740 based graphics cards will use ATI’s reference design and only a little later the market will welcome unique products with proprietary layouts. Although Advanced Micro Devices graphics division speaks of sub-$100 price point, it is not quite so. The new product MSRP is set at $109, and the $99 price is what you get after rebate.

 

The fact that a $100 graphics card is only 5-7% slower than the Radeon HD 4850 is indeed fantastic and signifies that the wave of revolutionary change has finally arrived to the sector of the most inexpensive gaming products.

 

 

The Radeon HD 4770 leaves its market opponents, Radeon HD 4830 and GeForce 9800 GT, far behind, outperforming them by an average 14 and 17%, respectively. The average difference between the new card and the GeForce GTS 250 512MB is less than 1%. But if you consider the results of the individual tests, you can see that Nvidia’s solution is somewhat more confident at 1280x1024 because the Radeon HD 4770 wins only 5 tests, including Red Alert 3 (thanks to which it has such a high average). On the other hand, the Radeon HD 4770 is far inferior to the GeForce GTS 250 512MB in only three games: F.E.A.R. 2: Project Origin, Prince of Persia and Tom Clancy’s H.A.W.X.

 

 

 

ADV::

 

# Best performance in its price range;

# Significantly outperforms Radeon HD 4830 and GeForce 9800 GT;

# Competes successfully against GeForce GTS 250 512MB;

# Yields slightly to Radeon HD 4850;

# Wide range of supported FSAA modes;

# Best Edge-detect CFAA in the industry;

# 40nm GPU production technology;

# 512MB of local GDDR5 video memory onboard;

# 640 ALU and 32 texture processors;

# DirectX 10.1 and Shader Model 4.1 support;

# Fully-fledged hardware HD video decoding;

# High-quality HD video post-processing with scalability;

# Built-in 8-channel audio controller with HD support;

# Sound over HDMI;

# Good overclocking potential;

# Low noise;

# Low power consumption

 

DIS::

 

None Found Yet

[mohanv8]

Any idea about its launch cos I'm planning to get a GTS250....so might consider this.....

[keith_j_snyder2]

It's already in the market for more than one month!!

[~--YeSH--~]

MSI =6.5k

 

sapphire=7.3k

 

msi = 8.5k

 

Id say it isnt reasonable in india 'coz u can get a 9800 GT 1gb for 7.7k which out performs 4770 in games like crysis , GTA 4

[chupchap]

Dude it's already available in India, I bought it recently. Just be careful the vendor doesn't rip you off. It happened to me when I bought the card from Bangalore. I blogged about it here.

Radeon is selling it for 8.5K while MSI is selling it for 6.5K

[mohanv8]

wat do u guys say...I'll get a GTS250 fir 7.9k or HD4770??? and a decent power supply is enough right...

[chupchap]

wat do u guys say...I'll get a GTS250 fir 7.9k or HD4770??? and a decent power supply is enough right...

Don't about GTS250 4770 just needs a decent power supply