From Mac Guides
Merom is the codename for Intel's mobile version of the 65nm Core 2 processor line. Intel began shipping Merom to manufacturers alongside Conroe (the desktop version) on July 27 2006. Variants of Merom is used in all Macs apart from the Mac Pro.
Merom is similar to the 32-bit Core Duo (codenamed Yonah), but supports 64-bit memory addressing, 64-bit integer operations, additional registers under programmatic control when operating in 64-bit mode, larger L2 cache in the faster models, improved vector processing units (now single cycle), more advanced branch prediction, and the ability to dispatch and retire more instructions per cycle. Intel claims it offers 20% better performance at the same clock speed when compared to Yonah.
The first version of Merom is pin compatible with Yonah and backwards compatible with the Napa Centrino motherboard. To install Merom in a Napa system, the worst that would be required is a BIOS/EFI update, otherwise the processor ID might not be properly reported to your operating system. New power management features might not be fully implemented as well. Still, this did not prevent users from installing prototype and engineering samples of the chips in Macs.
A second wave of Merom processors was launched in May 2007 featuring an 800 MT/s FSB and using the new Socket P. These chips are part of the new Centrino Duo platform code-named Santa Rosa. Santa Rosa pairs the updated Merom with the Crestline chipset, derived from the desktop 965 series. It comes in the GM965 and PM965 versions. The new platform sports 802.11n wireless, Robson flash technology, and the updated GMA X3000.
AnandTech has conducted some benchmarks on Merom. The benchmarks are carried out on the same laptop. The processors were simply swapped for each test. Merom worked fine in the laptop even though the BIOS did not have the proper processor ID.
Geek Patrol has conducted benchmarks of the original iMac Core Duo vs. the iMac Core 2 Duo using Geekbench. Overall Merom shows a 10% gain in performance.
NoteBookReview.com has done an exhaustive review of the Dell XPS 1710 and the Intel Core 2 Duo T7600G.
Core 2 Duo - "Merom" (64-bit, dual-core)
|Model||Clock Speed||Front Side Bus||Multiplier||L2 Cache||TDP||Socket||Release Date||Price (USD)||Notes|
|Core 2 Duo T5200||1.60 GHz||533 MHz||12x||2 MiB||34W||Socket M||2006 Oct||?|
|Core 2 Duo T5300||1.73 GHz||533 MHz||13x||2 MiB||34W||Socket M||2007 Q1||?|
|Core 2 Duo T5500||1.67 GHz||667 MHz||10x||2 MiB||34W||Socket M||2006 Aug||$209|
|Core 2 Duo T5600||1.83 GHz||667 MHz||11x||2 MiB||34W||Socket M||2006 Aug||$241|
|Core 2 Duo T7100||1.80 GHz||800 MHz||9x||2 MiB||35W||Socket P||2007 May||$209|
|Core 2 Duo L7200||1.33 GHz||667 MHz||8x||4 MiB||17W||FCBGA6||2007 Q2||$284|
|Core 2 Duo T7200||2.00 GHz||667 MHz||12x||4 MiB||34W||Socket M||2006 Aug||$294|
|Core 2 Duo T7300||2.00 GHz||800 MHz||10x||4 MiB||35W||Socket P||2007 May||$241|
|Core 2 Duo L7400||1.50 GHz||667 MHz||9x||4 MiB||17W||FCBGA6||2007 Q2||$316|
|Core 2 Duo T7400||2.16 GHz||667 MHz||13x||4 MiB||34W||Socket M||2006 Aug||$423|
|Core 2 Duo T7500||2.20 GHz||800 MHz||11x||4 MiB||35W||Socket P||2007 May||$315|
|Core 2 Duo T7600||2.33 GHz||667 MHz||14x||4 MiB||34W||Socket M||2006 Aug||$637|
|Core 2 Duo T7600G||2.33 GHz||667 MHz||14x||4 MiB||35W||Socket M||2006 Dec||?||Overclocks to 3.16 GHz|
|Core 2 Duo T7700||2.40 GHz||800 MHz||12x||4 MiB||35W||Socket P||2007 May||$529|
|Core 2 Duo X7800||2.6 GHz||800 MHz||13x||4 MiB||44W||Socket P||2007 Q3||$851||Page 1 News|
|Core 2 Duo X7900||2.80 GHz||800 MHz||14x||4 MiB||44W||Socket P||2007 Aug||?||Page 1 News |
Gilo is the successor to Merom. It is based off of the 65nm process and reportedly a multi-core mobile processor. Speculation points to a quad core processor.