Intel QX6700 Quad-Core Review 14

Intel QX6700 Quad-Core Review

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Introduction

My sincerest thanks go out to Intel for providing both the QX6700 CPU as well as the Bad Axe 2 motherboard.

When you enter the computer world, one of the first companies you will come across is Intel. And quite rightly so. After all, you cannot have a functioning computer without a CPU – that would be like trying to build a car without an engine. Intel has been with us for almost 40 years. All that time, it has been powering PCs, constantly increasing their performance over time.

In the last years, however, Intel was struggling to deliver the performance we are used to. AMD gained advantage in both gaming and benchmarking, sponsoring many events, and bragging about the capabilities of its 64-bit processors. Intel wasn’t asleep though – it did what it could to offer high performance solutions, yet it wasn’t too successful. There was something “wrong” with Intel’s CPUs – either they ran hot, or had large power requirements, or were simply slower than the AMD counterpart. So, the PC enthusiast world split up into two groups – those that were running AMD, and enjoying performance, and those that stayed with Intel, hoping for the return of the king.

Intel took the world by storm when news about its new Conroe architecture started appearing all over the Internet. Intel fans started to rejoice. They knew that now was the time for the enterprise to strike back at AMD, and regain the performance crown. Those in favor of AMD simply didn’t know what to think. At first, waves of amazement started to appear. But then, doubt kicked in – how on earth could Intel possibly achieve such benchmark scores on a CPU that was going to be run 24/7, and not just some super-cooled test sample? Is Intel playing a trick on us? As the official launch date got closer, even the most die-hard AMD supporters knew that, in order to enjoy maximum performance, they would have to step over to the dark side. There was no turning back.

It has now been half a year that we have enjoyed the benefits of the Core 2 architecture. Intel has risen from its own dust, showing people all around the world that it is in better shape than ever. Being very ambitious, Intel is prepared to launch a new architecture every two years, prolonging the applicability of Moore’s law. Since Intel stepped away from its own race for Gigahertz, it has shown a healthy trend in producing fast CPUs. Now, the “hit of the season” (I sure hope it lasts more than a year) is parallel computing – having more cores on a CPU, which in turn means faster processing in applications that are multi threaded.

Today, we take a look at the latest and greatest from Intel – the Core 2 Extreme QX6700. Sporting 4 cores, this CPU is bound to scream. But are there enough programs and benchmarks to take full advantage of what this CPU has to offer? How much of a performance increase can we expect, going from two cores to four? Read on to find out!

Intel Conroe CPUs

Below, you can find a table that lists Intel’s current Core 2 offerings

ModelCore Clock (MHz)CoresL2 Cache (MB)Front side bus (MHz)TDP (W)
E6300186622106665
E6400213322106665
E6600239424106665
E6700266724106665
X6800293324106675
QX6700266742x 41066130
We received the test kit at the office in a large brown box. Inside waited some basic instructions, as well as the motherboard with the CPU already mounted, and Intel’s stock heatsink.

Intel QX6700

Intel’s Core 2 Extreme is to be considered the first Quad-core CPU out on the market. Below are its main features:

Brand IDIntel Core 2 Extreme
Processor numberQX6700
Core Frequency2.66 GHz
System bus frequency1066 MHz
TDP130 W
SteppingB-3
Number of CPU cores4
L2 Cache8MB (2x 4MB)
CPUID06F7
Core to bus ratio limit10:1
Max Processor Input Voltage1.350V
PECI EnabledYes
Enhanced Intel Speed Step Technology (EIST)Yes
Extended HALT State (C1E) EnabledYes
Execute Disable Bit (XD) EnabledYes
Intel 64 TechnologyYes
Intel Virtualisation TechnologyYes
Package/SocketFC-LGA775





Well, what is under the heatspreader? Intel’s engineers have managed to squeeze two E6700 cores under one IHS – a marvelous feat that offers quad-core performance today. After all, it makes a lot of sense from Intel’s stand point – instead of spending a lot of money on developing one die with four cores in it, it is much easier to put together two dies, each with two cores. Also, Intel can pick the best E6700 chips for its QX6700 CPUs, and not have to worry about refining the manufacturing process as it would with a whole new core. Worth noting is also the massive amount of L2 cache – 8 MB in total, 4 MB per die, 2 MB per core.

Below, you can see what the two cores look like in real life:


Intel Bad-Axe 2

I won’t go into a lot of detail with the motherboard that was used. It was supplied as part of the test kit, and is Intel’s top-of-the-line motherboard, utilizing the 975X chipset. The Bad-Axe 2 features numerous improvements over its predecessor, mainly in the overclocking segment. Most importantly, it supports Core 2 Quad CPUs.



Our Bad-Axe 2 motherboard was a pre-production sample. This meant that it did not have automatic fan control, so the fan had to be set to a specific percentage in the BIOS. Retail boards can control the fan speed automatically depending on temperature. I also hope that Intel provides a better manual with their retail motherboards, we only received a simple poster explaining the main features and a simplified diagram of how to put together a computer.

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Aug 1st, 2025 13:19 CDT change timezone

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