事实上，C0步进的Core i7-965超至4.0GHz，需要继续增加电压，而D0步进在1.232V下即可达到4.0GHz（笔者认为此时只能正常进入系统），这说明D0步进降低电压的同时还能保持在较高频率。

 

    在1.312V电压下，Core i7-975可以超至4.14GHz

 

    我们尝试将倍频调至32，主频达到4.27GHz，尽管电压达到了1.36V，但仍不能在高负载下运行，也就是说这颗D0步进在风冷下不能超过4.2GHz。

Core i7-975 (DO)  Overclocking 3,334 MHz 3,475 MHz 3,609 MHz 3,743 MHz 3,876 MHz 4,009 MHz 4,144 MHz 4,277 MHz MultiplIEr 25 26 27 28 29 30 31 32 System Idle Power 110 W 110 W 110 W 110 W 110 W 110 W 111 W 113 W System Peak Power 217 W 230 W 246 W 253 W 257 W 258 275 W 289 W BIOS Vcore 1.152 V 1.152 V 1.152 V 1.152 V 1.152 V 1.152 V 1.152 V 1.202 V CPU-Z VT 1.136 V 1.2 V 1.232 V 1.232 V 1.232 V 1.232 V 1.232 V 1.28 V PLL 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V Fritz Chess Benchmark 12138 12570 13047 13520 13966 14360 14818 14818 Stable Yes Yes Yes Yes Yes Yes Yes No 　　 　　
System Hardware Benchmarks Details Core i7 CO Stepping Intel Core i7-965 Extreme (45 nm, 3.2 GHz, 4 x 256 KB L2 and 8 MB L3 Cache, TDP 130 W, Rev. C0) Core i7 DO Stepping Intel Core i7-975 Extreme (45 nm, 3.33 GHz, 4 x 256 KB L2 and 8 MB L3 Cache, TDP 130 W, Rev. D0) Motherboard (Socket 1366) MSI X58 Pro-E
Revision: 1.1
Chipset: Intel X58 + ICH10R
BIOS: 8.3 RAM DDR3 3 x 2 GB DDR3-1600 (Corsair TR3X6G-1600C8D 8-8-8-24) Graphics Zotac Geforce GTX 260?/STRONG>
GPU: Geforce GTX 260 (576 MHz)
Graphics RAM: 896 MB DDR3 (1998 MHz)
Stream Processors: 216
Shader Clock: 1242 MHz Hard Drive Western Digital VelociRaptor, 300 GB (WD3000HLFS)
10,000 RPM, SATA/300, 16 MB Cache Blu-ray Drive LG GGW-H20L, SATA/150 Power Supply PC Power & Cooling, Silencer 750EPS12V 750W 3D Games Benchmarks and Settings Benchmarks Details Far Cry 2 Version: 1.0.1
Far Cry 2 Benchmark Tool
Video Mode: 1280x800
Direct3D 9
Overall Quality: Medium
Bloom activated
HDR off
Demo: Ranch Small GTA IV Version: 1.0.3
Video Mode: 1280x1024
- 1280x1024
- Aspect Ratio: Auto
- All options: Medium
- VIEw Distance: 30
- Detail Distance: 100
- Vehicle Density: 100
- Shadow Density: 16
- Definition: On
- Vsync: Off
In-game Benchmark Left 4 Dead Version: 1.0.0.5
Video Mode: 1280x800
Game Settings
- Anti Aliasing none
- Filtering Trilinear
- Wait for vertical sync disabled
- Shader Detail Medium
- Effect Detail Medium
- Model/Texture Detail Medium
Demo: THG Demo 1 Audio Benchmarks and Settings Audio Details Itunes Version: 8.1.0.52
Audio CD ("Terminator II" SE), 53 min.
Convert to AAC audio format Lame MP3 Version 3.98
Audio CD "Terminator II SE", 53 min.
convert WAV to MP3 audio format
Command: -b 160 --nores (160 Kbps) Video Benchmarks and Settings Benchmarks Details TMPEG 4.6 Version: 4.6.3.268
Video: Terminator 2 SE DVD (720x576, 16:9) 5 minutes
Audio: Dolby Digital, 48000 Hz, 6-channel, English
Advanced Acoustic Engine MP3 Encoder (160 Kbps, 44.1 KHz) DivX 6.8.5 Version: 6.8.5
== Main Menu ==
default
== Codec Menu ==
Encoding mode: Insane Quality
Enhanced multithreading
Enabled using SSE4
Quarter-pixel search
== Video Menu ==
Quantization: MPEG-2 Xvid 1.2.1 Version: 1.2.1
Other Options / Encoder Menu -
Display encoding status = off Mainconcept Reference 1.6.1 Version: 1.6.1
MPEG-2 to MPEG-2 (H.264)
MainConcept H.264/AVC Codec
28 sec HDTV 1920x1080 (MPEG-2)
Audio:
MPEG-2 (44.1 kHz, 2-channel, 16-bit, 224 Kbps)
Codec: H.264
Mode: PAL (25 FPS)
Profile: Settings for eight threads Adobe PremIEre Pro CS4 Version: 4.0
WMV 1920x1080 (39 sec)
Export: Adobe Media Encoder
== Video ==
H.264 Blu-ray
1440x1080i 25 High Quality
Encoding Passes: one
Bitrate Mode: VBR
Frame: 1440x1080
Frame Rate: 25
== Audio ==
PCM Audio, 48 kHz, Stereo
Encoding Passes: one Application Benchmarks and Settings Benchmarks Details Grisoft AVG Anti-Virus 8 Version: 8.5.287
Virus base: 270.12.16/2094
Benchmark
SCan: some compressed ZIP and RAR archives Winrar 3.9 Version 3.90 x64 BETA 1
Compression = Best
Benchmark: THG-Workload Winzip 12 Version 12.0 (8252)
WinZIP Commandline Version 3
Compression = Best
Dictionary = 4096 KB
Benchmark: THG-Workload Autodesk 3D Studio Max 2009 Version: 9 x64
Rendering Dragon Image
Resolution: 1920 x 1280 (frame 1-5) Adobe Photoshop CS 4 (64-Bit) Version: 11
Filtering a 16MB TIF (15000x7266)
Filters:
Radial Blur (Amount: 10; Method: zoom; Quality: good)
Shape Blur (Radius: 46 px; custom shape: Trademark sysmbol)
Median (Radius: 1px)
Polar Coordinates (Rectangular to Polar) Adobe Acrobat 9 professional Version: 9.0.0 (Extended)
== Printing Preferenced Menu ==
Default Settings: Standard
== Adobe PDF Security - Edit Menu ==
Encrypt all documents (128-bit RC4)
Open Password: 123
Permissions Password: 321 MicROSoft Powerpoint 2007 Version: 2007 SP2
PPT to PDF
Powerpoint Document (115 Pages)
Adobe PDF-Printer Deep Fritz 11 Version: 11
Fritz Chess Benchmark Version 4.2 Synthetic Benchmarks and Settings Benchmark Details 3DMark Vantage Version: 1.02
Options: Performance
Graphics Test 1
Graphics Test 2
CPU Test 1
CPU Test 2 PCMark Vantage Version: 1.00
PCMark Benchmark
MemorIEs Benchmark SiSoftware Sandra 2009 Version: 2009 SP3
Processor Arithmetic, Cryptography, Memory Bandwith 9 7 3 1 2 3 4 4 8 :

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