Celeron B815 vs Core 2 Duo T7800

Place in the ranking	2843	2939
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Duo	Intel Celeron
Power efficiency	1.51	1.24
Architecture codename	Merom (2006−2008)	Sandy Bridge (2011−2013)
Release date	18 August 2007 (17 years ago)	1 January 2012 (12 years ago)
Launch price (MSRP)	$515	$86

Detailed specifications

Core 2 Duo T7800 and Celeron B815 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	2.6 GHz	1.6 GHz
Boost clock speed	2.6 GHz	1.6 GHz
Bus type	no data	DMI 2.0
Bus rate	800 MHz	4 × 5 GT/s
Multiplier	no data	16
L1 cache	64 KB	64K (per core)
L2 cache	4 MB	256K (per core)
L3 cache	0 KB	2 MB (shared)
Chip lithography	65 nm	32 nm
Die size	143 mm²	131 mm²
Maximum core temperature	100 °C	100 °C
Number of transistors	291 Million	504 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.075V-1.25V	no data

Compatibility

Information on Core 2 Duo T7800 and Celeron B815 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	1 (Uniprocessor)
Socket	PBGA479,PPGA478	FCPGA988,PGA988
Power consumption (TDP)	35 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T7800 and Celeron B815. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2
FMA	-	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	no data	-
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	no data	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	-	-
FDI	no data	+
Fast Memory Access	no data	+
FSB parity	-	no data

Security technologies

Core 2 Duo T7800 and Celeron B815 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Anti-Theft	no data	-

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T7800 and Celeron B815 are enumerated here.

VT-d	no data	-
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T7800 and Celeron B815. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	no data	DDR3
Maximum memory size	no data	16 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD Graphics for 2nd Generation Intel Processors
Graphics max frequency	no data	1.05 GHz

Graphics interfaces

Available interfaces and connections of Core 2 Duo T7800 and Celeron B815 integrated GPUs.

Number of displays supported	no data	2
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
SDVO	no data	+
CRT	no data	+

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T7800 and Celeron B815.

PCIe version	no data	2.0
PCI Express lanes	no data	16

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 T7800 0.56
+21.7%

Celeron B815 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 Duo T7800 884
+20.9%

Celeron B815 731

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 Duo T7800 237

Celeron B815 243
+2.5%

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 Duo T7800 364

Celeron B815 413
+13.5%

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 Duo T7800 2663
+27.2%

Celeron B815 2093

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 Duo T7800 5014
+24.4%

Celeron B815 4029

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 T7800 2258
+37.3%

Celeron B815 1645