ATI R700 | ATI Radeon HD 4870 | ATI Radeon HD 4850 | ATI Radeon HD 3870 | |
Stream Processors | 800 x 2 | 800 | 800 | 320 |
Texture Units | 40 x 2 | 40 | 40 | 16 |
ROPs | 16 x 2 | 16 | 16 | 16 |
Core Clock | 750MHz | 750MHz | 625MHz | 775MHz+ |
Memory Clock | 900MHz (3600MHz data rate) GDDR5 | 900MHz (3600MHz data rate) GDDR5 | 993MHz (1986MHz data rate) GDDR3 | 1125MHz (2250MHz data rate) GDDR3 |
Memory Bus Width | 256-bit x 2 | 256-bit | 256-bit | 256-bit |
Frame Buffer | 1GB x 2 | 512MB | 512MB | 512MB |
Transistor Count | 956M x 2 | 956M | 956M | 666M |
Manufacturing Process | TSMC 55nm | TSMC 55nm | TSMC 55nm | TSMC 55nm |
Price Point | > $500 | $299 | $199 | $199 |
스펙 비교표
RV770 아키텍쳐
테스트 시스템
Test Setup | |
CPU | Intel Core 2 Extreme QX9770 @ 3.20GHz |
Motherboard | EVGA nForce 790i SLI Intel DX48BT2 |
Video Cards | ATI Radeon HD 4850 ATI Radeon HD 3870 X2 ATI Radeon HD 3870 EVGA GeForce 9800 GTX KO NVIDIA GeForce 9800 GTX+ NVIDIA GeForce 9800 GTX NVIDIA GeForce 9800 GX2 NVIDIA GeForce 8800 GTX NVIDIA GeForce 8800 GT NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 260 |
Video Drivers | Catalyst Press Driver (8.7 beta) Catalyst 8.5 ForceWare 177.34 (for GT200) ForceWare 177.39 (for 9800 GTX/9800 GTX+) ForceWare 175.16 (everything else) |
Hard Drive | Seagate 7200.9 120GB 8MB 7200RPM |
RAM | 4 x 1GB Corsair DDR3-1333 7-7-7-20 |
Operating System | Windows Vista Ultimate 64-bit SP1 |
PSU | PC Power & Cooling Turbo Cool 1200W |