PowerColor HD 2900XT (ATI 給 NVIDIA 的反擊！)
 

PowerColor HD 2900XT 512MB 512Bit DDR3


記憶體 & 頻寬---512MB MB GDDR3 / 512bit
晶片核心時脈----740 MHz
記憶體時脈-------825 MHz x 2
輸出----------------DVIx2/ HDMI
匯流排介面-------PCIE
像素管線----------320 stream processing units
Direct X 10
TV 轉接頭--------S-Vide


* 700 million transistors on 80nm HS fabrication process
* 512-bit 8-channel GDDR3 memory interface
* Ring Bus Memory Controller
o Fully distributed design with 1024-bit internal ring bus for memory reads and writes
o Optimized for high performance HDR (High Dynamic Range) rendering at high display resolutions
* Unified Superscalar Shader Architecture
o 320 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
o 128-bit floating point precision for all operations
o Command processor for reduced CPU overhead
o Shader instruction and constant caches
o Up to 80 texture fetches per clock cycle
o Up to 128 textures per pixel
o Fully associative multi-level texture cache design
o DXTC and 3Dc+ texture compression
o High resolution texture support (up to 8192 x 8192)
o Fully associative texture Z/stencil cache designs
o Double-sided hierarchical Z/stencil buffer
o Early Z test, Re-Z, Z Range optimization, and Fast Z Clear
o Lossless Z & stencil compression (up to 128:1)
o Lossless color compression (up to 8:1)
o 8 render targets (MRTs) with anti-aliasing support
o Physics processing support
* Full support for Microsoft® DirectX® 10.0
o Shader Model 4.0
o Geometry Shaders
o Stream Output
o Integer and Bitwise Operations
o Alpha to Coverage
o Constant Buffers
o State Objects
o Texture Arrays
* Dynamic Geometry Acceleration
o High performance vertex cache
o Programmable tessellation unit
o Accelerated geometry shader path for geometry amplification
o Memory read/write cache for improved stream output performance
* Anti-aliasing features
o Multi-sample anti-aliasing (up to 8 samples per pixel)
o Up to 24x Custom Filter Anti-Aliasing (CFAA) for improved quality
o Adaptive super-sampling and multi-sampling
o Temporal anti-aliasing
o Gamma correct
o Super AA (CrossFire™ configurations only)
o All anti-aliasing features compatible with HDR rendering
* Texture filtering features
o 2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel)
o 128-bit floating point HDR texture filtering
o Bicubic filtering
o sRGB filtering (gamma/degamma)
o Percentage Closer Filtering (PCF)
o Depth & stencil texture (DST) format support
o Shared exponent HDR (RGBE 9:9:9:5) texture format support
* CrossFire™ Multi-GPU Technology
o Scale up rendering performance and image quality with 2 or more GPUs
o Integrated compositing engine
o High performance dual channel interconnect
* ATI Avivo™ HD Video and Display Platform
o Two independent display controllers
+ Drive two displays simultaneously with independent resolutions, refresh rates, color controls and video overlays for each display
+ Full 30-bit display processing
+ Programmable piecewise linear gamma correction, color correction, and color space conversion
+ Spatial/temporal dithering provides 30-bit color quality on 24-bit and 18-bit displays
+ High quality pre- and post-scaling engines, with underscan support for all display outputs
+ Content-adaptive de-flicker filtering for interlaced displays
+ Fast, glitch-free mode switching
+ Hardware cursor
o Two integrated dual-link DVI display outputs
+ Each supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI) or 2560x1600 (dual-link DVI)1
+ Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content2
o Two integrated 400 MHz 30-bit RAMDACs
+ Each supports analog displays connected by VGA at all resolutions up to 2048x15363
o HDMI output support
+ Supports all display resolutions up to 1920x10801
+ Integrated HD audio controller with multi-channel (5.1) AC3 support, enabling a plug-and-play cable-less audio solution
o Integrated AMD Xilleon™ HDTV encoder
+ Provides high quality analog TV output (component/S-video/composite)
+ Supports SDTV and HDTV resolutions
+ Underscan and overscan compensation
o HD decode acceleration for H.264/AVC, VC-1, DivX and MPEG-2 video formats
+ Flawless DVD, HD DVD, and Blu-ray™ playback
+ Motion compensation and IDCT (Inverse Discrete Cosine Transformation)
o HD video processing
+ Advanced vector adaptive per-pixel de-interlacing
+ De-blocking and noise reduction filtering
+ Edge enhancement
+ Inverse telecine (2:2 and 3:2 pull-down correction)
+ Bad edit correction
+ High fidelity gamma correction, color correction, color space conversion, and scaling
o MPEG-2, MPEG-4, DivX, WMV9, VC-1, and H.264/AVC encoding and transcoding
o Seamless integration of pixel shaders with video in real time
o VGA mode support on all display outputs
* PCI Express x16 bus interface
* OpenGL 2.0 support

1 Some custom resolutions require user configuration
2 HDCP support for playback of protected content requires connection to a HDCP capable display

NIVDIA 應該要更謹慎了
R600的實力真的不錯，在預設值下，沒有TWEAK及LOD調整
在 FUTUREMARK 表現下已經讓 NVIDIA 高階卡汗顏了…
內建HDMI (顯像及音效輸出) 加上迷人的價格，2900XT 真是好物！

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Default Clcok - Single Card 2900XT IN 3DMARK

測試設備：
X6800 Stock 2.93G 11x267
DDRII 800 3.3.3.1 512MBX2
ASUS P5WDG2-WS-PRO (975X)
PowerColor HD 2900XT Default (743/828) - SINGLE CARD
ZIPPY850W
WINDOWS XP SP2 (NO Tweaking)

3DMARK 05 - 18260


3DMARK03 - 37721


3DMARK06 - 10804

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Default Clcok - CrossFire 2900XT IN 3DMARK

測試設備：
X6800 Stock 2.93G 11x267
DDRII 800 3.3.3.1 512MBX2
ASUS P5WDG2-WS-PRO (975X)
PowerColor HD 2900XT Default (743/828) - CrossFire
ZIPPY850W
WINDOWS XP SP2 (NO Tweaking)

3DMARK05 - 19561


3DMARK03 - 61941


3DMARK06 - 13892

DeFault VGA Clock - Single Card - 2900XT CPU OC 3.6G IN 3DMARK

測試設備：
X6800 Stock 2.93G @ 3.6G 9X400
DDRII 800 3.3.3.1 512MBX2
ASUS P5WDG2-WS-PRO (975X)
PowerColor HD 2900XT Default (743/828) - Single Card
ZIPPY850W
WINDOWS XP SP2 (NO Tweaking)

3DMARK05 - 21029


3DMARK03 - 39080


3DMARK06 - 11431



-------------------------------------------------


DeFault VGA Clock - CrossFire - 2900XT CPU OC 3.6G IN 3DMARK

測試設備：
X6800 Stock 2.93G @ 3.6G 9X400
DDRII 800 3.3.3.1 512MBX2
ASUS P5WDG2-WS-PRO (975X)
PowerColor HD 2900XT Default (743/828) - CrossFire
ZIPPY850W
WINDOWS XP SP2 (NO Tweaking)

3DMARK05 - 23771


3DMARK03 - 64762


3DMARK06 - 16319

<單卡超頻>


PowerColor HD 2900XT (743/828) OC (850/1000)

Gerenal OC with Stock VGA FAN

INTEL X6800 2.93G OC 3.8G 9x422
DDRII 844 3.3.3.8 512MBX2
ASUS P5WDG2-WS-PRO 0804 (975x)
PowerColor HD 2900XT oc 850/1000 SINGLE CARD
WD360GD SATA1
ZIPPY850W
Ambient Temp: 29.2°C
WINDOWS XP SP2 (NO Tweaking)

3DMARK05 - 22790


3DMARK03 - 43681


3DMARK06 - 12663

是餅乾大耶!!

話說2900的出現,會讓高階顯卡價格掉很快.....

希望呀，2900xt 和 8800gtx/ultra 互相勝出的地方，…
8800gts應該要快點降價，還有8800ultra的價格就…太誇張了。

除了HDMI 完整支援(image/audio) 及 遊戲效能很強外，聽說SPECviewperf 的opengl效能直逼專業卡，有空來跑看看。

論壇看了2900XT的成績,真是笑不出來,遊戲實戰根本被8800GTX打假的...除了記憶體較少,高解析度輸情有可原,剩下可看的,大概就是ATI主打的多媒體娛樂功能吧,HDCP,VIVO,HDMI其實可有可無,有了,爽度滿分,沒有其實也無傷大雅,有在用HDCP,HDMI,VIVO的人少之又少,ATI直接把價格往下調比較實際,大概只有ATI死忠fans才會想買...要是8800GTS 640MB降價,2900XT可慘了..

2900XT很吸引人，要更吸引人的話
只能看往後遊戲靠他那邊站的多不多
不然遊戲上面NV方面真是非常的吃香

本來有點想換這張的，

結果各大論壇的測試都顯示，

這張卡就只有跑3D MARK好看而已，

遊戲方面頂多跟8800GTS打平，

效能跟3D MARK分數不成正比，

感覺ATI的工程師想做的不是遊戲用顯卡而是3D MARK用......

持續觀望到暑假看看吧!

看新驅動拿不能壓榨出遊戲的FPS而不是3D MARK的分數，

不然以這張卡的硬體規格感覺不應該這麼弱才對。