Today AMD announced their Radeon HD 4890 Series. It is based on the RV790 GPU which is an improved version of the RV770. The major cornerstone specifications have remained the same, only improvements related to clock frequencies have been made. While it was almost impossible to get an RV770 to run far beyond 800 MHz, the ATI HD 4890 reference runs at 850 MHz core by default. Many partners will be offering overclocked boards as well ranging up to 1000 MHz core speed.
We have three HD 4890 reviews for you today:
Powercolor HD 4890 (this review), Sapphire HD 4890 and AMD HD 4890 CrossFire. While AMD has been sending out overclocked cards running at 900 MHz, our cards are based on the reference design clocks of 850 MHz.
If you consider yourself a good artist, you may also want to check out our Create your own ATI high-end graphics card contest.
Please note that the PowerColor HD 4890 we are testing today has been pulled out of the stock of a german distributor which means it is guaranteed to not be a golden sample.
|GeForce GTS |
250 1 GB
HD 4870 X2
|Shader units||112||800||128||128||192||800||800||240||240||2x 800||240|
|Memory Size||512 MB||512 MB||512 MB||1024 MB||896 MB||512 MB||1024 MB||896 MB||1024 MB||2x 1024 MB||1024 MB|
|Memory Bus Width||256 bit||256 bit||256 bit||256 bit||448 bit||256 bit||256 bit||448 bit||512 bit||2x 256 bit||512 bit|
|Core Clock||600 MHz||625 MHz||675 MHz||738 MHz||576 MHz||750 MHz||850 MHz||633 MHz||602 MHz||750 MHz||648 MHz|
|Memory Clock||900 MHz||993 MHz||1100 MHz||1100 MHz||999 MHz||900 MHz||975 MHz||1134 MHz||1107 MHz||900 MHz||1242 MHz|