Any major difference between the GDDR3 and GDDR4 versions of HD 3870?

[mathiasschnell]

I had noticed recently that GDDR4 versions of the HD 3870 (and maybe the 3850 too, didn't really check) have been popping up. I'm guessing this was a silent release because I hadn't heard of it happening. Anywho, has anyone seen if the memory change makes a big difference in the performance? If so, where's the benchies?

 

[invisik]

yes it makes a difference the 3850 is similar in spec to the 3870 but the 3870 has gddr4. dont have any benchmarks but its just wat i no of my knowledge. (correct me if im wrong)

 

[mathiasschnell]

yes it makes a difference the 3850 is similar in spec to the 3870 but the 3870 has gddr4. dont have any benchmarks but its just wat i no of my knowledge. (correct me if im wrong)

The 3870 comes with either GDDR3 or GDDR4. I'm asking if the memory makes a difference in the 3870s, and how big of one.

 

[Dalyinx]

I believe the GDDR4 version is clocked about 200mhz faster than the GDDR3 on the memory, which makes it have a larger bandwidth, but I'm not entirely sure.

I'm guessing you would see a difference at higher resolutions, but don't quote me on that.

 

[invisik]

oh my bad. i believe that the memory will make a big difference.
bandwidth hungry games will run alot faster with gddr4. im assuming the difference will be about 10-15%