Core 2 Duo T6400 vs Core 2 Extreme X7900

Place in the ranking	2720	2936
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Extreme	Intel Core 2 Duo
Power efficiency	1.50	1.24
Architecture codename	Merom (2006−2008)	Penryn (2008−2011)
Release date	1 September 2007 (17 years ago)	1 January 2009 (15 years ago)
Launch price (MSRP)	$851	no data

Detailed specifications

Core 2 Extreme X7900 and Core 2 Duo T6400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	2 (Dual-core)	2 (Dual-core)
Threads	2	2
Base clock speed	2.8 GHz	2 GHz
Boost clock speed	2.8 GHz	2 GHz
Bus rate	800 MHz	800 MHz
L1 cache	128 KB	no data
L2 cache	4 MB	2 MB
L3 cache	0 KB	2 MB L2 Cache
Chip lithography	65 nm	45 nm
Die size	143 mm²	no data
Maximum core temperature	100 °C	105 °C
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.1V-1.375V	1V-1.25V

Compatibility

Information on Core 2 Extreme X7900 and Core 2 Duo T6400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	no data
Socket	PPGA478	PGA478
Power consumption (TDP)	44 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme X7900 and Core 2 Duo T6400. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	-	no data
Demand Based Switching	-	-
AMT	+	no data
FSB parity	-	no data

Security technologies

Core 2 Extreme X7900 and Core 2 Duo T6400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme X7900 and Core 2 Duo T6400 are enumerated here.

VT-x

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X7900 and Core 2 Duo T6400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1

no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Core 2 Extreme X7900 0.70
+52.2%

Core 2 Duo T6400 0.46

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Core 2 Extreme X7900 1104
+51.9%

Core 2 Duo T6400 727

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Extreme X7900 387
+66.1%

Core 2 Duo T6400 233

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Extreme X7900 625
+72.2%

Core 2 Duo T6400 363

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

Core 2 Extreme X7900 3022
+42.9%

Core 2 Duo T6400 2115

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

Core 2 Extreme X7900 5764
+43.9%

Core 2 Duo T6400 4005

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

Core 2 Extreme X7900 2449
+38.6%

Core 2 Duo T6400 1768

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

Core 2 Extreme X7900 31.05
+27%

Core 2 Duo T6400 39.42