The Radeon HD 3000 and HD 4000 series
My first good Ati cards were a 2nd hand Sapphire HD3870 (PCIe) and a third hand Sapphire HD3850 (AGP). As they are made using a 55 nm process they are comparable to the nVidia Geforce GT200 series, as can my son's HD 4870 -a lucky dustbin find. My HD 4770 is even made on a 40 nm process, like the Fermi generation. Unfortunately the support for these fine cards in the latest OS-es is lacking, amongst others due to the lack of proper OpenCL support. We will miss the fine DP performance they offered.
Model/Type |
GPU |
Fab in nm |
Shaders |
TMA |
ROP |
GFLOP SP |
GFLOP DP |
TDP |
Gflop(SP)
/Watt |
Gflop(DP)
/Watt |
Radeon HD 3000 Series |
|
|
|
|
|
|
1/5 of SP |
|
|
|
Radeon HD 3850 |
RV670 PRO |
55 |
320 |
16 |
16 |
428 |
86 |
75 |
5.71 |
1.14 |
Radeon HD 3870 |
RV670 XT |
55 |
320 |
16 |
16 |
497 |
99 |
106 |
4.69 |
0.94 |
Radeon HD 4000 Series |
|
|
|
|
|
|
1/5 of SP |
|
|
|
Radeon HD 4770 |
RV740 |
40 |
640 |
32 |
16 |
960 |
192 |
80 |
12.00 |
2.40 |
Radeon HD 4870 |
RV770 XT |
55 |
800 |
40 |
16 |
1200 |
240 |
160 |
7.50 |
1.50 |