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AMD ATI Radeon HD 4770 512MB GDDR5 review Print E-mail
Written by Dimitar Dinchev a.k.a. Veseliq   
Saturday, 20 June 2009

The world is at its knees because of financial crisis threatening to surpass the great depression of '29 and at times like these even the large manufacturers do change their marketing strategies in order to cope. AMD and NVIDIA gained momentum by releasing products that have high price/performance ratio, and while the older models are constantly reevaluated, the new ones that are being released have even lower prices and grater performance. While in the low end NVIDIA cease not releasing pleiad of cards based on the extremely successful G92 core, that does not change the fact that its nearly year and a half old, thus AMD chose to approach the low-mid class with a tad different strategy. And it is best presented by the new ATI HD 4770 512MB GDDR5, based on the RV740 - the very first 40nm TSMC technology core. So, let's see what exactly we've got here before us, what indeed for that lucrative recommended price of only $99.

HD 4670
9600 GT
HD 4770
9800 GT
HD 4850
Shader units 320 64 640 112800
ROPs 8 16 16 16 16
GPU RV730 G94 RV740 G92 RV770
Transistors 512M 505M 826M 754M 956M
Memory Size 512 MB 512 MB 512 MB 512 MB 512 MB
Memory Bus Width 128 bit 256 bit 128 bit 256 bit 256 bit
Core Clock 750 MHz 650 MHz 750 MHz 600 MHz 625 MHz
Memory Clock 1000 MHz 900 MHz 800 MHz 900 MHz 993 MHz
Цена (USD) $65 $75 $99 $100 $130

Before we begin to talk about all the tests and the performance it would be best to clarify exactly which NVIDIA cards is HD 4770 supposed to stand against and also how does it compares to the current AMD models too. First with its price of $99, HD 4770 is a exact match to another AMD model, namely - HD 4830. But those two models have such low prices for entirely different reasons. While HD 4830 is a result of a RV770 cores marriage (with two ftom the ten of their SIMD units turned off, since it oftenly happens that during GPU manufacture some do come damaged off the conveyer, while still being usable for lower models that are limited in different ways anyway), the core of HD 4770 is build with the smallest video card transistors ever - a mere 40nm ones. And because of that it manages to fit in its miniature 143.75mm2 whole 826 million transistors! It's no secret that AMD had been quite exitedy talkinfg about HD 4770 long before its release. The computing power of the new RV740 core is 960 GigaFLOPs. And while icorectly to make direct comparison in GigaFLOPs between AMD and NVIDIA, one between cards from the same family for each of the companies is quite valid. And so - HD 4830 has "merely" 736 GigaFLOPs of performance while HD 4850 just passes 1 TeraFLOP. This gives us a clear view and moderately accurate idea as to what is the HD 4770 capable of, compared to the two above mentioned models.

And as you have already guessed it, HD 4770 is aimed straight at the GeForce 9800 GT (or perhaps at its twin in the form of GeForce 8800 GT) share of the market. AMD quite strongly objected to the NVIDIA marketing policy (and wouldn't you know it - they did notice and therefore did not rename 9800 GT to GeForce GTS 240), but then again that's old news, we've been pissed about that for at least an year now :)

And so, since the card is comparable in both price and performance to HD 4830, HD 4850 and 9800 GT, we concluded our review with those exact same four cards! But before we get to the test themselves we will say few more words about RV740.

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