Merom (microprocessor)#Merom XE

{{Short description|Code name for various mobile Intel processors}}

{{About|the series of mobile processors|the 65 nm microarchitecture|Intel Core (microarchitecture)}}

{{Infobox CPU

| name = Merom

| image =Acer Extensa 5220 - Columbia MB 06236-1N - Intel Celeron M 530 - SLA2G - in Socket 479-5029.jpg

| image_size =

| caption =Celeron M 530 - SLA2G - 1.73GHz, 1 MB L2 Cache, 533 MT/s FSB

| produced-start = 2006

| produced-end = 2009

| slowest = 1.6

| fastest = 2.8

| slow-unit = GHz

| fast-unit = GHz

| fsb-slowest = 533

| fsb-fastest = 800

| fsb-slow-unit = MHz

| fsb-fast-unit = MHz

| size-from = 65 nm

| size-to =

| soldby = Intel

| designfirm = Intel

| manuf1 = Intel

| core1 =

| sock1 = Socket M

| sock2 = Socket P

| pack1 =

| code = 80537

| cpuid = 06Fx (Merom-L: 1066x)

| brand1 = Mobile Celeron 5xx

| brand2 = Mobile Celeron Dual-Core E1xxx

| brand3 = Mobile Pentium Dual-Core T2xxx

| brand4 = Mobile Pentium Dual-Core T3xxx

| brand5 = Core 2 Duo T5xxx

| brand6 = Core 2 Duo T7xxx

| brand7 = Core 2 Duo L7xxx

| brand8 = Core 2 Duo U7xxx

| brand9 = Core 2 Solo U2xxx

| arch = x86_64 (64-bit)

| microarch = Core

| numcores = 2 (Merom-L: 1)

| l1cache = 32 KB instruction, 32 KB data per core

| l2cache = Merom: 4 MB
Merom-2M: 2 MB
Merom-L: 1 MB

| l3cache =

| application = Mobile

| predecessor = Yonah

| successor = Penryn

| support status = Unsupported

}}

Merom is the code name for various mobile Intel processors that are sold as Core 2 Duo, Core 2 Solo, Pentium Dual-Core and Celeron. It was the first mobile processor to be based on the Core microarchitecture, replacing the Enhanced Pentium M-based Yonah processor. Merom has the product code 80537, which is shared with Merom-2M and Merom-L that are very similar but have a smaller L2 cache. Merom-L has only one processor core and a different CPUID model. The desktop version of Merom is Conroe and the dual-socket server version is Woodcrest. Merom was manufactured in a 65 nanometer process, and was succeeded by Penryn, a 45 nm version of the Merom architecture. Together, Penryn and Merom represented the first 'tick-tock' in Intel's Tick-Tock manufacturing paradigm, in which Penryn was the 'tick' (new process) to Merom's 'tock' (new architecture).

Variants

class="wikitable" ! Processor !! Brand name !! Model (list) !! Cores !! L2 Cache !! Socket	TDP
Merom-L \| Mobile Core 2 Solo \| U2xxx	1	2 MiB	BGA479	5.5 W
Merom-2M \| rowspan=3\|Mobile Core 2 Duo \| U7xxx	rowspan=3\|2	2 MiB	rowspan=2\|BGA479	10 W
Merom \| L7xxx	4 MiB	17 W
Merom Merom-2M \| T5xxx T7xxx	2-4 MiB	Socket M Socket P BGA479	35 W
Merom \| Mobile Core 2 Extreme \| X7xxx	2	4 MiB	Socket P	44 W
Merom \| rowspan=4\|Celeron M (Socket M) and Celeron (Socket P) \| 5x0	rowspan=4\|1	rowspan=2\|1024 KiB	rowspan=2\|Socket M Socket P	30 W
Merom-L \| 5x0	27 W
Merom-2M \| 5x5	1024 KiB	Socket P	31 W
Merom-L \| 5x3	512-1024 KiB	BGA479	5.5-10 W
Merom-2M \| Celeron Dual-Core \| T1xxx	2	512-1024 KiB	Socket P	35 W
Merom-2M \| Pentium Dual-Core \| T2xxx T3xxx	2	1 MiB	Socket P	35 W

=Merom=

Merom, the first mobile version of the Core 2, was officially released on July 27, 2006, but quietly began shipping to PC manufacturers in mid-July, alongside Conroe.{{cite web|url=http://macnn.com/articles/06/07/21/merom.conroe.ship.early/|title=Intel's Core 2 Duo chips arrive early|date=July 21, 2006|website=MacNN|url-status=dead|archive-url=https://web.archive.org/web/20061107101811/http://macnn.com/articles/06/07/21/merom.conroe.ship.early/|archive-date=November 7, 2006|access-date=2006-07-21}}{{cite web|title=Intel second quarter 2006 earnings release; see page 3 |url=http://download.intel.com/intel/finance/earnings/20060719EarningsFinal.pdf |publisher=Intel |date=2006-07-19 |access-date=2006-07-21 |archive-url=https://web.archive.org/web/20060722002316/http://download.intel.com/intel/finance/earnings/20060719EarningsFinal.pdf |archive-date=2006-07-22 |url-status=dead }} Merom became Intel's premier line of mobile processors, with mostly the same features as Conroe, but with a greater emphasis on low power consumption to enhance notebook battery life. Merom-based Core 2 Duo provides a slight performance increase associated with 3D rendering and media-encoding tasks,{{Cite web|url=https://www.anandtech.com/show/2056/17|title=Mobile CPU Wars: Core 2 Duo vs. Core Duo|last=Shimpi|first=Anand Lal|date=August 3, 2006|website=AnandTech|access-date=2019-12-20}} yet maintains the same battery life as the Yonah-based Core Duo. Merom is the first Intel mobile processor to feature Intel 64 architecture.

The first version of Merom is "drop-in" compatible with Napa platform for Core Duo, requiring at most a motherboard BIOS update. It has a similar thermal envelope of 34 W and the same 667 MT/s FSB rate.{{cite web|url=https://www.anandtech.com/show/1965|title=Spring IDF 2006: Merom and Ultra Mobile PCs|last=Shimpi|first=Anand Lal|date=March 7, 2006|website=AnandTech|access-date=2006-07-17}} The Merom die features 4 MB L2 cache, half of which is deactivated in the T5xx0 CPUs. A native 2 MB L2 version of the Merom core, called Merom-2M, was rolled out in early 2007 as a counterpart to Allendale. The Merom-2M core uses the steppings L2 and M0 and the ultra-low-voltage versions of the Core 2 Duo use this core.

A second wave of Merom processors featuring an 800 MT/s FSB and using the new Socket P was launched on May 9, 2007.{{cite web |last=Olsen |first=Sven |title=Intel Forecasts "Santa Rosa" for May 2007. |url=http://computershopper.com/shoptalk/2007/03/07/intel_centrino_pro_set_to_laun |publisher=Computer Shopper |date=2007-03-07|access-date=2007-03-07 }} These chips are part of Santa Rosa platform.{{cite web|url=http://www.dailytech.com/article.aspx?newsid=2546|title=Intel 2006 Mobile CPU Roadmap Update|last=Kubicki|first=Kristopher|date=May 26, 2006|website=DailyTech|url-status=dead|archive-url=https://web.archive.org/web/20060528004953/http://www.dailytech.com/article.aspx?newsid=2546|archive-date=May 28, 2006|access-date=December 20, 2019}} Low voltage versions were also released on May 9, 2007.

Merom (מרום) is the Hebrew word for a higher plane of existence or a level of heaven; BaMerom (במרום) means "in the heavens". The name was chosen by the Intel team in Haifa, Israel, who designed this processor.

==Merom XE==

The Core 2 Extreme Mobile processor, based on the Merom XE core, is a mobile CPU designed for laptops. It was released in two models, the X7900 and the X7800. These feature an 800 MT/s FSB. The X7800, introduced on July 16, 2007,{{cite news|url=http://www.intel.com/ca/pressroom/2007/0716.htm |title=Intel Takes Popular Laptops to 'Extreme' with First-Ever Extreme Edition Mobile Processor; Adds New Desktop Chip |publisher=Intel News Release |date=July 16, 2007 |access-date=2007-08-30 |archive-url=https://web.archive.org/web/20071223012224/http://www.intel.com/ca/pressroom/2007/0716.htm |archive-date=December 23, 2007 |url-status=dead }} is clocked at 2.6 GHz and costs around $851 for OEMs. The processor features a 44 W TDP and requires the new Intel Centrino (Santa Rosa) platform. The X7900, introduced on August 22, 2007, is clocked at 2.8 GHz.

The X7900 processor was used in the top-end iMacs released on August 7, 2007.

=Merom-2M=

The mobile version of the Allendale desktop processor is often called Merom-2M to identify the smaller L2 cache. Some T5xxx and T7xxx processors have come out with both Merom and Merom-2M dies, which can only be distinguished through their stepping number.

= Merom-L =

The Merom-L processor is based on the same model as Conroe-L but is used in mobile Socket M and Socket P systems as Celeron 5xx and Core 2 Solo U2xxx, some of which also use regular Merom and Merom-2M chips with one core disabled in contrast to the real Merom-L that only has 1 MB L2 cache and a single core. The CPUID is family 6 model 23 (10661h), which is between Merom and Penryn.

The first Core 2 Solo processors were launched in Q3 2007 and consisted of the U2100 and U2200, which run at 1.06 and 1.2 GHz, respectively. They both feature a 533 MT/s FSB and are part of Intel's ULV family, running at only 5 W. Like the rest of the Core 2 family, they are 64-bit compatible. They were released with compatibility for the Napa platform rather than the newer Santa Rosa platform due to power consumption concerns.{{cite web|title=Intel Core 2 Solo ULV Processors Coming in Q3 2007|url=http://laptoping.com/intel-core-2-solo-ulv-celeron-m-500-523.html|publisher=laptoping.com|date=2006-12-21|access-date=2007-11-04|url-status=dead|archive-url=https://web.archive.org/web/20071106003016/http://laptoping.com/intel-core-2-solo-ulv-celeron-m-500-523.html|archive-date=2007-11-06}}

Fixes

Microsoft has released a microcode update (KB2493989) for Windows 7 that addresses several stability issues on selected "Penryn" and "Merom" CPUs.{{cite web|url=https://support.microsoft.com/en-us/help/2493989/microcode-update-for-intel-processors-in-windows-7-or-in-windows-serve|title=Microcode update for Intel processors in Windows 7 or in Windows Server 2008 R2|access-date=2020-11-03}}

References

External links

[http://ark.intel.com/products/codename/2683/Merom List of Intel processors codenamed Merom]

Category:Intel_microprocessors