Intel E6750 CPU

ccokeman - 2007-08-08 16:39:56 in CPU's
Category: CPU's
Reviewed by: ccokeman   
Reviewed on: August 13, 2007
Price: $189.99 USD


You've gotten the upgrade itch again. Your system is up to date, you have a dual core processor already, but that hardware jones just won’t go away. Kind of like the new car itch. You get in and smell the newness, kick the tires, and the salesman leads you down the hallway to the finance room to talk to the numbers guy. Then you finally put your name on the dotted line and you are now the proud owner of a new car. On the way home the buyers regret starts. By the time you get home, you start to realize that the other car was still pretty nice. You won’t have to sign on the dotted line and promise out your first born child to be able to own one of Intel’s latest Core 2 Duo CPUs. In fact, with the latest price drops, they are downright affordable. For the Average Joe, 2.66 GHz, 1066MHz and 1333MHz are numbers that really don’t mean a whole lot.

For the enthusiast, those numbers bring the hope of increased performance and higher clock speeds from the CPUs that we chose. Intel’s latest Core 2 Duo CPUs feature a 333 FSB instead of the 266 FSB we have grown accustomed to. Built using the same 65 nanometer process as its predecessors, it includes a shared L2 cache of 4 megabytes with 64 bit support on a socket 775 platform. Many motherboards currently on the market have the capability to use these new CPUs, while some need just a simple BIOS update to gain the capability. So why not jump in and take a look while we see what the latest from Intel has to offer.

Intel was formed at a time when the average size computer took up a large amount of space, usually several rooms. My how times have changed. Now the heart of a computer can be held in the palm of your hand with no thoughts of being crushed. Intel has lead the way with innovation and continually reducing the size of the processor and increasing the level of performance.

Closer Look :

The CPU that Intel has sent to us is an E6750 that runs at 333 FSB with a clock multiplier of 8. The package arrived tucked neatly in a sealed bag with the CPU in an OEM style box.



Opening the box, we get our first glimpse of the contents. Inside, we can see that we have a spanking new E6750 processor to put to the test.



Looking at the CPU, it appears to be an Engineering sample, not a retail CPU. Is that a bad thing? Not really. If you are an enthusiast, this could be a diamond or just a shiny lump of coal. As with any processor, your mileage may vary on the results you can achieve. With the socket 775 platform, you will notice that there are no pins on the bottom of the CPU. A little different, but it still works without the thought of bending pins during the installation.



The installation process is slightly different from many processors that have been produced. With the 775 socket, Intel has migrated away from using pins on the bottom of the CPU to make contact with the socket. Instead of the pins being on the processor, the pins are spring loaded in the socket and the contact surface on the CPU is just a flat circular disc. This eliminates the fear of bending a pin if for some reason you drop the processor or it was handled roughly during shipment. While this is a change, it is for the better in my opinion.

Installing this processor into the motherboard is no different than any other socket 775 Intel processor. You will want to start out by opening the hold down mechanism. Lift out and up on the retention arm to release the hold down mechanism. Then lift the hold down plate and insert your CPU, making sure you index the processor into the socket using the two notches on the socket and processor as your guide.



With the processor properly indexed, push the hold down plate into place and close the retention arm and lock it into place, reversing the process used to release the hold down plate. Install the heatsink with some new thermal paste and you are ready for that all night test and tune session to find out what it will do.




Configuring your hardware for this processor can range from a simple clear CMOS if this processor is an upgrade, to a BIOS update if the motherboard it is used in cannot recognize the processor. Most socket 775 motherboards released in the past six months should be capable of supporting this style processor. The differences in front side bus speed and clock multiplier are apparent in these two BIOS screen shots. The E6700 that was removed from this motherboard is shown on the left and the new E6750 is shown on the right.



sSpec Number
CPU Speed
Bus Speed
Bus/ Core Ratio
L2 Cache Size
L2 Cache Speed
Package Type
LGA 775
Manufacturing technology
65 nm
Core Stepping
CPUID String
Thermal Design Power
Thermal Specification
Core Voltage



Dual-Core Processing

Two independent processor cores in one physical package run at the same frequency, and share up to 4 MB of L2 cache as well as up to a 1333 MHz1 Front Side Bus, for truly parallel computing.

Intel® Wide Dynamic

Improves execution speed and efficiency, delivering more instructions per clock cycle. Each core can complete up to four full instructions simultaneously.

Intel® Smart Memory Access

Optimizes the use of the data bandwidth from the memory subsystem to accelerate out-of-order

execution. A newly designed prediction mechanism reduces the time in-flight instructions have to wait for data. New pre-fetch algorithms move data from system memory into fast L2 cache in advance of execution. These functions keep the pipeline full, improving instruction throughput and performance

Intel® Advanced Smart Cache

The shared L2 cache is dynamically allocated to each processor core based on workload. This efficient, dual-core optimized implementation increases the probability that each core can access data from fast L2 cache, significantly reducing latency to frequently used data and improving performance

Intel® Advanced Digital  Media Boost

Accelerates the execution of Streaming SIMD Extension (SSE) instructions to significantly improve the performance on a broad range of applications, including video, audio, image and photo processing, multimedia, encryption, financial, engineering and scientific applications. The 128-bit SSE instructions are now issued at a throughput rate of one per clock cycle effectively doubling their speed of execution on a per clock basis over previous generation processors.

Intel® Virtualization
(Intel VT)

Intel® VT allows one hardware platform to function as multiple “virtual” platforms. For businesses, Intel VT  offers improved manageability, limiting downtime and maintaining worker productivity by isolating computing activities into separate partitions.

Intel® Trusted Execution
Technology (Intel® TXT)

Intel® TXT provides hardware-based mechanisms to help protect against software-based attacks and help protect the confidentiality and integrity of data stored or created on the system. It does this by enabling a trusted environment where applications can run within their own space, protected from all other software on the system.

Intel® 64 Architecture

Enables the processor to access larger amounts of memory. With appropriate 64-bit supporting hardware and software, platforms based on an Intel processor supporting Intel 64 architecture can allow the use of extended virtual and physical memory.

Execute Disable Bit4

Provides enhanced virus protection when deployed with a supported operating system. The Execute Disable Bit allows memory to be marked as executable or non-executable, allowing the processor to raise an error to the operating system if malicious code attempts to run in non-executable memory, thereby preventing the code from infecting the system.

Intel Designed Thermal Solution for Boxed  Processors

Includes a 4-pin connector for fan speed control to help minimize the acoustic noise levels generated from running the fan at higher speeds for thermal performance.5 Fan speed control technology is based on actual CPU temperature and power usage.




I will be running this processor through our benchmarking suite to show what kind of performance this chip delivers. The benchmarking suite we will use includes both system tests, as well as gaming benchmarks. To make my performance comparisons, I will be comparing this processor against other processors, including some of the latest CPUs by AMD, as well as Intel. All stock clock speeds will be run at default specs to eliminate any variables. All video card settings were left at setup defaults, also to eliminate any variables.


Testing Setup:

Comparison System:


The system tests we will be using are listed below:

Lets get started with Apophysis. This program is used primarily to render and generate fractal flame images. We will run this benchmark with the following settings:

The measurement used is time to render, in minutes, to complete.


Lower is Better


WinRAR is a tool to archive and compress large files to a manageable size. We will use 10MB, 100MB and 500MB files and test the time needed to compress these files. Time will be measured in seconds.





As expected, the results between the processors of equal clockspeed are similar.


Specview is a benchmark designed to test OpenGL performance. The tests used for comparison are listed below. The default tests were chosen to be able to compare across platforms. In these tests, higher scores equate to better performance.



Higher is Better


Higher is Better


Higher is Better


Higher is Better


The stock speed results comparing the E6750 to the E6700 do not really show one processor beating the other in the benchmarks. Clock for clock, the two chips are very even in performance.


PcMark05 is used to measure complete system performance. We will be running a series of tests to gauge the performance of each individual processor to see which, if any, rises above the others. 





Higher is Better



Higher is Better



Higher is Better



Higher is Better


The results between the 6700 and 6750 seem to be within a margin of error.


Sisoft Sandra is a diagnostic utility and synthetic benchmarking program. Sandra allows you to view your hardware at a higher level to be more helpful. For this benchmark, I will be running a broad spectrum of tests to gauge the performance of key areas of the motherboards.





Processor Arithmetic



Multi-Core Efficiency



Memory Bandwidth



Memory Latency



Cache and Memory



File System


Physical Disks



Power Management Efficiency


Multi-Core efficiency is where the E6750 shines in Sandra. Among the other tests, it is a mixed bag of performance, with it winning some tests and coming close in the others.


Sciencemark tests real world performance instead of using synthetic benchmarks. For this test, we ran the benchmark suite and will use the overall score for comparison.





Higher is Better!


Cinebench is useful for testing your system, CPU and OpenGL capabilities using the software program CINEMA 4D. We will be using the default tests for this benchmark.


Higher is Better


HD Tune measures disk performance to make comparisons between drives or disk controllers.


Higher is Better



Lower is Better


Now that the system benchmarks are complete, we will move on to the video benchmarking portion of the review. I will be using an EVGA 8800GTS 640MB as the video card of choice for today's test. We will be using an assortment of games to test performance across different  processors to look for any performance advantages. The testing will start with resolutions at 800x600 and progressing to 1280x1024 to try and take the video card out of the equation and show the performance at resolutions where processor performance can influence the results.


The game tests that we use are as follows:


First up we have Far Cry. This game makes extensive use of pixel shaders and features Polybump Normal Mapping technology to increase character details.


We will be using the Hardware OC Benchmarking Utility version 1.8 with the following settings.





The Intel processors pull ahead at the lower resolutions until the video card starts to limit performance.


F.E.A.R. is a newer game that includes its own benchmarking utility. We will be using this test to benchmark the game. This game introduces a new AI model that emulates real squad behavior. It has the ability to counteract the moves you make rather than having a predictable routine.


The settings we will use are below:





Run to run variances seem to be the order of the day when it comes down to determining a winner with F.E.A.R..


Microsoft Flight Simulator X is the newest edition of the popular flight simulator. For testing, I will fly the same route through each resolution. Testing will start at a resolution of 1024X768 since this is the lowest resolution available in the game.


The settings we will use are listed below:






Flight Simulator X is the newest installment of the series and proves to be a severe test for even high-end systems when the graphics settings are cranked up. At lower resolutions, the overclocked 6750 is easily 7 to 8 frames per second faster. Once the resolution reaches 1600x1200, the difference shrinks to 2 FPS.


Call of Duty 2 is a WWII first-person shooter game that is dated, but still maintains a tremendous online following. This test will consist of a timed run on the Stalingrad multi-player map, measured by Average FPS (frames per second).


The settings used are listed below:







Quake 4 is next up for testing. We will be using the Hardware OC Quake 4 Benchmark Utility version 1.5 to complete the testing with this game. You will need to update to the most current version for the latest time demo and bug fixes. Average FPS (frames per second) will be the measure used.


The settings we will use are listed below:






The Intel processors pull ahead by anywhere from 8 to 17 FPS in this benchmark.


Need For Speed: Most Wanted. For this test, we will time each race and record the average FPS (Frames Per Second) achieved.


The settings we will use are listed below.






Performance was pretty even across both platforms. With the difference between platforms being anywhere from 0 to 4 FPS, it is not something noticeable while gaming.


3DMark06 is one of the benchmarks that always comes up when a bragging contest begins. 3DMark06 presents a severe test for many of today's hardware components. Let's see how this set of processors perform. We will only be comparing the E6700, E6750 and AMD 6000+ for this series of benchmarks. The settings used are listed below.







Because this review is all about the processor, we will be showing how the CPU scored in each of the resolutions we tested.



RyderMark is a new benchmark developed by Candella Software. The benchmark illustrates a speed boat race through the famed canals of Venice, Italy. There are many options that can be changed in the benchmark; the settings we have settled on to complete this benchmark are listed below. We will be running this test with the E6700 and E6750 Intel processors, as well as an AMD 6000+ for comparison. Please check back for a full review on this new benchmark.



















First things first. Overclocking will void your warranty, as well as possibly damage other hardware you own. In no way is liable for any damage you do to your own hardware because of this article or any others. Overclock at your own risk.

With that being said, this processor was possibly the easiest I have ever had to overclock. Because I am using air cooling for this review, extreme voltage to the CPU core is not a reality. When run at the same vcore, the E6750 ran much cooler than my lapped E6700, The difference in temperatures was something I was not expecting since all of my Core2Duo chips run on the warm side. This is not saying the chip won’t heat up, it just runs 5 to 7 degrees C cooler on average than my other chips.

When pushed, it just kept going and going. I was finally able to top out at around 4.1GHz with this chip (bench stable). While bench stable is nice for the guys chasing world records, that’s not my game. I need to have the stability to run long term. There is just something about blue screens and reboots in the middle of my favorite games that drives me insane. Now the results you get from any CPU will vary depending on any number of variables, but the maximum (24/7) stable clock speed I could achieve was 3.960GHz. This is well over the best performing E6600 I have had by a wide margin, and I feel there is more performance left on the table. But for now, who wouldn’t be happy with a CPU that runs this speed 24/7 at reasonable volts (1.565 set in BIOS)?




At stock speeds, the performance of the E6750 was equal to the E6700 it replaced. It should be, as both the E6700 and E6750 run at the same speed of 2.66GHz. Theoretically, the 6750 should perform slightly better due to the higher front side bus, but that proved to be a non-issue and performance was right where it should be. Where this CPU really shows its worth to me is when it is overclocked. It was able to reach higher speeds at lower volts and temperatures than any of the other Core2Duo chips I have had. The performance per dollar spent makes this new line of 1333 FSB processors a tremendous value. If you consider the fact that the E6750 comes in at a price $18 dollars less than the E6600, and $108 less than the E6700 it replaces, you really cannot go wrong. If you don’t do any overclocking and have an E6700 or better, there really is no need to upgrade unless you want to just have the latest and greatest thing out there. On the other hand, if you are an enthusiast and are always on the lookout for that high performance chip, then this may be just the ticket for that next high performance upgrade.