AMD Radeon HD 4770 Review 51

AMD Radeon HD 4770 Review

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Today AMD releases the first 40 nm GPU in the world. Their new RV740 graphics processor powers the HD 4770 Series which is targeted at the sub-$100 segment. Rather than focusing on a small volume in high-end graphics, AMD has realized that a lot of people want cheap, affordable graphics that still can play most games out today.

RV740 is heavily based on Radeon HD 4850/4870/4890 technology. For example we are seeing GDDR5 memory on the card. Since RV740 comes only with a 128-bit memory bus interface, GDDR5 can show huge improvements because it effectively doubles the memory bandwidth. So RV740 with 128-bit GDDR5 has the same bandwidth as 256-bit RV770 with GDDR3 (HD 4850).

Architecture-wise RV740 is identical to other member of the RV7xx Series, there are no changes. This means that the GPU comes with support for DirectX 10.1 and UVD 2 HD Video Decode Acceleration.

HD 4350
9400 GT
HD 4550
HD 4650
9500 GT
HD 4670
9600 GT
HD 4770
9800 GT
HD 4850
Shader units 8016803203232064640112800
Transistors242M314M242M514M314M512M505M 826M754M 956M
Memory Size256 MB512M512 MB512 MB256 MB /
512 MB
512 MB512 MB 512 MB512 MB 512 MB
Memory Bus Width 64 bit128 bit64 bit128 bit128 bit128 bit256 bit 128 bit256 bit 256 bit
Core Clock600 MHz550 MHz600 MHz650 MHz550 MHz750 MHz650 MHz 750 MHz600 MHz 625 MHz
Memory Clock500 MHz400 MHz400 MHz400 MHz900 MHz1000 MHz900 MHz 800 MHz900 MHz 993 MHz
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May 23rd, 2022 22:35 EDT change timezone

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