| Sapphire Radeon HD 4870 X2 Video Card 100251SR |
 |
|
Reviews -
Featured Reviews: Video Cards
|
| Written by Olin Coles |
| Sunday, 17 August 2008 |
|
Page 3 of 13
Sapphire 100251SR Specifications
The ATI Radeon HD 4870 X2 GPU brings the power of graphics to gamers, setting a new standard for visual computing. Redefine the way you play and take HD gaming to the extreme with best-in-class performance. The new TeraScale graphics engine delivers an immersive, cinematic gaming experience. Add this GPU to your PC and watch Blu-ray movies and play HD content with incredible visual fidelity.* Do it all with break-through efficiency that doesn't compromise performance.
1.912 billion transistors total (956 million transistors per GPU on 55nm fabrication process)
Display Output: Dual DL-DVI-I+HDTV
RV770 Core Clock: 750 MHz (x2)
Memory Clock: 900MHz, 1800 MHz DDR.
PCI Express 2.0 x16 bus interface
1024MB /256bit GDDR5 memory interface (x2)
Dual-Slot Active Cooler
HDMI compliant via dongle
7.1 Audio Channel Support
Microsoft DirectX 10.1 support
Shader Model 4.1 support
Product SKU:100251SR
|
Series
|
ATI Radeon HD 4870 |
ATI Radeon HD 4850 |
ATI Radeon HD 4850 X2
|
ATI Radeon HD 4870 X2 |
| Stream Processors |
800 |
800 |
800x2
|
800x2 |
| Texture Units |
40 |
40 |
40x2
|
40x2 |
| ROPs |
16 |
16 |
16x2
|
16x2 |
| Core Clock |
750MHz |
625MHz |
625MHz
|
750MHz |
| Memory Clock |
900MHz (3600MHz data rate) GDDR5 |
993MHz (1986MHz data rate) GDDR3 |
993MHz (1986MHz data rate) GDDR3
|
900MHz (3600MHz data rate) GDDR5 |
| Memory Bus Width |
256-bit |
256-bit |
2x256-bit
|
2x256-bit |
| Frame Buffer |
512MB/1GB |
512MB |
2x1GB
|
2x1GB |
| Transistor Count |
956M |
956M |
2x514M
|
2x956M |
| Manufacturing Process |
TSMC 55nm |
TSMC 55nm |
TSMC 55nm
|
TSMC 55nm |
Unified Superscalar Shader Architecture
-
1600 stream processing units
-
Dynamic load balancing and resource allocation for vertex, geometry, and pixel shaders
-
Common instruction set and texture unit access supported for all types of shaders
-
Dedicated branch execution units and texture address processors
-
128-bit floating point precision for all operations
-
Command processor for reduced CPU overhead
-
Shader instruction and constant caches
-
Up to 320 texture fetches per clock cycle
-
Up to 128 textures per pixel
-
Fully associative multi-level texture cache design
-
DXTC and 3Dc+ texture compression
-
High resolution texture support (up to 8192 x 8192)
-
Fully associative texture Z/stencil cache designs
-
Double-sided hierarchical Z/stencil buffer
-
Early Z test and Fast Z Clear
-
Lossless Z & stencil compression (up to 128:1)
-
Lossless color compression (up to 8:1)
-
8 render targets (MRTs) with anti-aliasing support
-
Physics processing support
Anti-Aliasing Features
-
Multi-sample anti-aliasing (2, 4 or 8 samples per pixel)
-
Up to 24x Custom Filter Anti-Aliasing (CFAA) for superior quality
-
Adaptive super-sampling and multi-sampling
-
Gamma correct
-
Super AA (ATI CrossFireXTM configurations only)
-
All anti-aliasing features compatible with HDR rendering
Texture Filtering Features
-
2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel)
-
128-bit floating point HDR texture filtering
-
sRGB filtering (gamma/degamma)
-
Percentage Closer Filtering (PCF)
-
Depth & stencil texture (DST) format support
-
Shared exponent HDR (RGBE 9:9:9:5) texture format support
|
