A9-9420 vs Core 2 Duo T9900

Place in the ranking	2645	2500
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Duo	AMD Bristol Ridge
Power efficiency	2.03	5.96
Architecture codename	Penryn (2008−2011)	Stoney Ridge (2016−2019)
Release date	2 June 2009 (15 years ago)	31 May 2016 (8 years ago)
Launch price (MSRP)	$530	no data

Detailed specifications

Core 2 Duo T9900 and A9-9420 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	3.06 GHz	3 GHz
Boost clock speed	0.07 GHz	3.6 GHz
Bus rate	1066 MHz	no data
L1 cache	64 KB (per core)	160 KB
L2 cache	6 MB (shared)	1 MB (shared)
L3 cache	6 MB L2 Cache	no data
Chip lithography	45 nm	28 nm
Die size	107 mm²	125 mm²
Maximum core temperature	105 °C	90 °C
Maximum case temperature (TCase)	no data	74 °C
Number of transistors	410 million	1,200 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.05V-1.2125V	no data

Compatibility

Information on Core 2 Duo T9900 and A9-9420 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
Socket	BGA479,PGA478	FT4
Power consumption (TDP)	35 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T9900 and A9-9420. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Virtualization,
AES-NI	-	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Demand Based Switching	-	no data

Security technologies

Core 2 Duo T9900 and A9-9420 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T9900 and A9-9420 are enumerated here.

AMD-V	-	+
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T9900 and A9-9420. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2, DDR3

DDR4

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

Radeon R5

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T9900 and A9-9420.

PCIe version	no data	3.0
PCI Express lanes	no data	8

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 T9900 0.78

A9-9420 0.98
+25.6%

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 T9900 1187

A9-9420 1498
+26.2%

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 T9900 398
+22.5%

A9-9420 325

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 T9900 638
+27.6%

A9-9420 500

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 T9900 3538
+23%

A9-9420 2875

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 T9900 7094
+46.5%

A9-9420 4841

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 Duo T9900 25.1

A9-9420 21.29
+17.9%

Gaming performance

Pros & cons summary

Performance score	0.78	0.98
Recency	2 June 2009	31 May 2016
Chip lithography	45 nm	28 nm
Power consumption (TDP)	35 Watt	15 Watt

A9-9420 has a 25.6% higher aggregate performance score, an age advantage of 6 years, a 60.7% more advanced lithography process, and 133.3% lower power consumption.

The A9-9420 is our recommended choice as it beats the Core 2 Duo T9900 in performance tests.

Should you still have questions on choice between Core 2 Duo T9900 and A9-9420, ask them in Comments section, and we shall answer.