- Joined
- May 25, 2009
- Messages
- 236 (0.04/day)
Processor | AMD R5 7600X |
---|---|
Motherboard | Asrock X670E Pro RS |
Cooling | Noctua NH-15S |
Memory | 2*16 GB 5600 CL34 |
Video Card(s) | XFX 6800XT 319 Merc |
Storage | Samsung 970 Evo |
Power Supply | Super Flower 850 Gold |
Mouse | Steelseries 310 |
Hey W1zzard, what do you think about doing an in-depth article on how the memory bandwidth is bottlenecking the 5870?
Regarding the memory bottleneck for a 5870, whenever I see a dual 4890 in Crossfire beating a 5870, I blame it on the reduced total memory bandwidth for a 5870 compared to two 4890's in total.
A 5870 theoretically should be at least equal to dual 4890's in specifications, save the memory bandwidth. It should NEVER be slower than dual 4890's if it were not bottlenecked by memory, simply due to the fact that crossfire scaling is not 100% efficient.
Once again, if I see a 2x 4890 beating a 5870 by say, 40% at a high resolution, I simply point my fingers at the memory bandwidth of a 5870. It is as logical as it can get.
Yes should see some improvements with 1600(6400)GDDR5 but all benches are done using beta drivers and as for the article's RV770 scaling i remember a 4850 being at 3870X2 levels ,especially with AA (625*10clusters=750*8clusters,and by the way a 850mil transistor 4770 also delivers more than a 2*666)