Core 2 Extreme X7800 vs Core 2 Duo T9400

Place in the ranking	2758	2689
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Duo	Intel Core 2 Extreme
Power efficiency	1.73	1.55
Architecture codename	Penryn (2008−2011)	Merom XE (2007)
Release date	15 July 2008 (16 years ago)	17 July 2007 (17 years ago)
Launch price (MSRP)	$316	$851

Detailed specifications

Core 2 Duo T9400 and Core 2 Extreme X7800 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	2.53 GHz	2.6 GHz
Boost clock speed	2.53 GHz	2.6 GHz
Bus rate	1066 MHz	800 MHz
L1 cache	128 KB	128 KB
L2 cache	6 MB	4 MB
L3 cache	6 MB L2 Cache	4 MB L2 Cache
Chip lithography	45 nm	65 nm
Die size	107 mm²	143 mm²
Maximum core temperature	105 °C	100 °C
Number of transistors	410 Million	291 Million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.05V-1.162V	1.1V-1.375V

Compatibility

Information on Core 2 Duo T9400 and Core 2 Extreme X7800 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.

Socket	BGA479,BGA956,PBGA479,PGA478	PPGA478
Power consumption (TDP)	35 Watt	44 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T9400 and Core 2 Extreme X7800. 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	-	-
FSB parity	-	-

Security technologies

Core 2 Duo T9400 and Core 2 Extreme X7800 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T9400 and Core 2 Extreme X7800 are enumerated here.

VT-x

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 Duo T9400 0.64

Core 2 Extreme X7800 0.72
+12.5%

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 Duo T9400 1011

Core 2 Extreme X7800 1138
+12.6%

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 Duo T9400 2304
+10.8%

Core 2 Extreme X7800 2079