Intel introduced the LGA 775 (Socket T) in 2004 to replace Socket 478. It became a widely used CPU socket, featured in popular processors including Pentium 4, Pentium D, Core 2 Duo, and Core 2 Quad.
One of the things that made the LGA 775 so popular was its ability to support both single-core and multi-core processors, which made it a versatile choice for a wide range of users. It was also compatible with Intel’s Hyper-Threading technology, which allowed for better CPU utilization and multitasking performance.
The push-pin installation mechanism on the LGA 775 socket was a significant improvement over the old lever and arm method. It allowed for faster and more convenient installation and removal of CPUs. This was especially useful for people who frequently upgraded their computer hardware or worked with multiple CPUs. The push-pin mechanism also improved the overall stability and durability of the socket, making it more reliable and long-lasting.
List of LGA 775 processors
There were many CPUs that used the LGA 775 socket, including some of Intel’s most popular desktop and server processors. Here are some of the most notable CPUs that used the socket:
- Pentium 4: One of the first processors to use the this socket, the Pentium 4 was a popular choice for desktop users in the mid-2000s.
- Core 2 Duo: Intel’s first dual-core processor, the Core 2 Duo was a major breakthrough in CPU technology and helped to establish Intel’s dominance in the market.
- Core 2 Quad: Building on the success of the Core 2 Duo, the Core 2 Quad was a quad-core processor that offered even more performance for demanding applications.
- Xeon 3000/3200: Designed for use in entry-level servers and workstations, the Xeon 3000/3200 series offered improved performance and reliability compared to desktop CPUs.
- Xeon 5300: The Xeon 5300 series was a high-end server CPU that offered up to 4 cores and 8 threads, making it ideal for demanding applications like virtualization and data analysis.
| Processor model | Cores | Base Frequency | Cache | TDP | Process | Launch Date |
|---|---|---|---|---|---|---|
| Pentium 4 Extreme Edition | 1 | 3.46 GHz | 2 MB L2 Cache | 110.7W | 130 nm | 2004 |
| Intel Core2 Duo E8600 | 2 | 3.33 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Pentium E6800 | 2 | 3.33 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Core2 Extreme QX9770 | 4 | 3.20 GHz | 12 MB L2 Cache | 136W | 45 nm | 2008 |
| Intel Pentium E5800 | 2 | 3.20 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Pentium E6700 | 2 | 3.20 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Core2 Duo E8500 | 2 | 3.16 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Duo E7600 | 2 | 3.06 GHz | 3 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Pentium E6600 | 2 | 3.06 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Core2 Extreme QX6850 | 4 | 3.00 GHz | 8 MB L2 Cache | 130W | 65 nm | 2007 |
| Intel Core2 Duo E8400 | 2 | 3.00 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Extreme QX9650 | 4 | 3.00 GHz | 12 MB L2 Cache | 130W | 45 nm | 2007 |
| Intel Core2 Quad Q9650 | 4 | 3.00 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Pentium E5700 | 2 | 3.00 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Core2 Extreme QX6800 | 4 | 2.93 GHz | 8 MB L2 Cache | 130W | 65 nm | 2007 |
| Intel Core2 Duo E7500 | 2 | 2.93 GHz | 3 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Pentium E6500 | 2 | 2.93 GHz | 2 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Pentium E6500K | 2 | 2.93 GHz | 2 MB | 65W | 45 nm | 2009 |
| Intel Core2 Quad Q9550 | 4 | 2.83 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Core2 Duo E8300 | 2 | 2.83 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q9550S | 4 | 2.83 GHz | 12 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Quad Q9505 | 4 | 2.83 GHz | 6 MB L2 Cache | 95W | 45 nm | 2009 |
| Intel Core2 Quad Q9505S | 4 | 2.83 GHz | 6 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Duo E7400 | 2 | 2.80 GHz | 3 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Pentium E6300 | 2 | 2.80 GHz | 2 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Pentium E5500 | 2 | 2.80 GHz | 2 MB | 65W | 45 nm | 2010 |
| Intel Pentium E5400 | 2 | 2.70 GHz | 2 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Celeron E3500 | 2 | 2.70 GHz | 1 MB | 65W | 45 nm | 2010 |
| Intel Core2 Extreme QX6700 | 4 | 2.66 GHz | 8 MB L2 Cache | 130W | 65 nm | 2006 |
| Intel Core2 Quad Q6700 | 4 | 2.66 GHz | 8 MB L2 Cache | 105W | 65 nm | 2007 |
| Intel Core2 Duo E8200 | 2 | 2.66 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q9450 | 4 | 2.66 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Core2 Duo E8190 | 2 | 2.66 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q9400 | 4 | 2.66 GHz | 6 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Core2 Duo E7300 | 2 | 2.66 GHz | 3 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q8400 | 4 | 2.66 GHz | 4 MB L2 Cache | 95W | 45 nm | 2009 |
| Intel Core2 Quad Q9400S | 4 | 2.66 GHz | 6 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Quad Q8400S | 4 | 2.66 GHz | 4 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Pentium E5300 | 2 | 2.60 GHz | 2 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Celeron E3400 | 2 | 2.60 GHz | 1 MB | 65W | 45 nm | 2010 |
| Intel Core2 Duo E7200 | 2 | 2.53 GHz | 3 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q9300 | 4 | 2.50 GHz | 6 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Pentium E5200 | 2 | 2.50 GHz | 2 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Core2 Quad Q8300 | 4 | 2.50 GHz | 4 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Celeron E3300 | 2 | 2.50 GHz | 1 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Quad Q6600 | 4 | 2.40 GHz | 8 MB L2 Cache | 105W | 65 nm | 2007 |
| Intel Core2 Duo E4600 | 2 | 2.40 GHz | 2 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Pentium E2220 | 2 | 2.40 GHz | 1 MB L2 Cache | 65W | 65 nm | 2008 |
| Intel Celeron E1600 | 2 | 2.40 GHz | 512 KB L2 Cache | 65W | 65 nm | 2009 |
| Intel Celeron E3200 | 2 | 2.40 GHz | 1 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Quad Q8200 | 4 | 2.33 GHz | 4 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Core2 Quad Q8200S | 4 | 2.33 GHz | 4 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Core2 Duo E4500 | 2 | 2.20 GHz | 2 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Pentium E2200 | 2 | 2.20 GHz | 1 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Celeron E1500 | 2 | 2.20 GHz | 512 KB L2 Cache | 65W | 65 nm | 2006 |
| Intel Celeron 450 | 1 | 2.20 GHz | 512 KB L2 Cache | 35W | 65 nm | 2008 |
| Intel Core2 Duo E6400 | 2 | 2.13 GHz | 2 MB L2 Cache | 65W | 65 nm | 2006 |
| Intel Celeron 440 | 1 | 2.00 GHz | 512 KB L2 Cache | 35W | 65 nm | 2006 |
| Intel Core2 Duo E4400 | 2 | 2.00 GHz | 2 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Pentium E2180 | 2 | 2.00 GHz | 1 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Celeron E1400 | 2 | 2.00 GHz | 512 KB L2 Cache | 65W | 65 nm | 2008 |
| Intel Core2 Duo E6300 | 2 | 1.86 GHz | 2 MB L2 Cache | 65W | 65 nm | 2006 |
| Intel Core2 Duo E4300 | 2 | 1.80 GHz | 2 MB L2 Cache | 65W | 65 nm | 2006 |
| Intel Celeron 430 | 1 | 1.80 GHz | 512 KB L2 Cache | 35W | 65 nm | 2007 |
| Intel Pentium E2160 | 2 | 1.80 GHz | 1 MB L2 Cache | 65W | 65 nm | 2006 |
| Intel Celeron 420 | 1 | 1.60 GHz | 512 KB L2 Cache | 35W | 65 nm | 2007 |
| Intel Pentium E2140 | 2 | 1.60 GHz | 1 MB L2 Cache | 65W | 65 nm | 2007 |
| Intel Celeron E1200 | 2 | 1.60 GHz | 512 KB L2 Cache | 65W | 65 nm | 2008 |
List Xeon processors
| Processor model | Cores | Base Frequency | Cache | TDP | Process | Launch Date |
|---|---|---|---|---|---|---|
| Intel Xeon X5270 | 2 | 3.50 GHz | 6 MB L2 Cache | 80W | 45 nm | 2008 |
| Intel Xeon X5272 | 2 | 3.40 GHz | 6 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon X5492 | 4 | 3.40 GHz | 12 MB L2 Cache | 150W | 45 nm | 2008 |
| Intel Xeon X5260 | 2 | 3.33 GHz | 6 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon X5470 | 4 | 3.33 GHz | 12 MB L2 Cache | 120W | 45 nm | 2008 |
| Intel Xeon X5482 | 4 | 3.20 GHz | 12 MB L2 Cache | 150W | 45 nm | 2007 |
| Intel Xeon X5460 | 4 | 3.16 GHz | 12 MB L2 Cache | 120W | 45 nm | 2007 |
| Intel Xeon E3120 | 2 | 3.16 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Xeon X3380 | 4 | 3.16 GHz | 12 MB L2 Cache | 95W | 45 nm | 2009 |
| Intel Xeon L3110 | 2 | 3.00 GHz | 6 MB L2 Cache | 45W | 45 nm | 2009 |
| Intel Xeon E5450 | 4 | 3.00 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon E5472 | 4 | 3.00 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon X5450 | 4 | 3.00 GHz | 12 MB L2 Cache | 120W | 45 nm | 2007 |
| Intel Xeon X5472 | 4 | 3.00 GHz | 12 MB L2 Cache | 120W | 45 nm | 2007 |
| Intel Xeon E3110 | 2 | 3.00 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Xeon E5240 | 2 | 3.00 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Xeon L5240 | 2 | 3.00 GHz | 6 MB L2 Cache | 40W | 45 nm | 2008 |
| Intel Xeon X3370 | 4 | 3.00 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Xeon E5440 | 4 | 2.83 GHz | 12 MB L2 Cache | 80W | 45 nm | 2008 |
| Intel Xeon X3360 | 4 | 2.83 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Xeon L3360 | 4 | 2.83 GHz | 12 MB L2 Cache | 65W | 45 nm | 2009 |
| Intel Xeon E5462 | 4 | 2.80 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon X5355 | 4 | 2.66 GHz | 8 MB L2 Cache | 120W | 65 nm | 2006 |
| Intel Xeon X3230 | 4 | 2.66 GHz | 8 MB L2 Cache | 95W | 65 nm | 2007 |
| Intel Xeon E5430 | 4 | 2.66 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon L5430 | 4 | 2.66 GHz | 12 MB L2 Cache | 50W | 45 nm | 2008 |
| Intel Xeon X3350 | 4 | 2.66 GHz | 12 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Xeon L5238 | 2 | 2.66 GHz | 6 MB L2 Cache | 35W | 45 nm | 2008 |
| Intel Xeon X3330 | 4 | 2.66 GHz | 6 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Xeon E5420 | 4 | 2.50 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon L5420 | 4 | 2.50 GHz | 12 MB L2 Cache | 50W | 45 nm | 2008 |
| Intel Xeon X3320 | 4 | 2.50 GHz | 6 MB L2 Cache | 95W | 45 nm | 2008 |
| Intel Xeon X3220 | 4 | 2.40 GHz | 8 MB L2 Cache | 105W | 65 nm | 2007 |
| Intel Xeon 5140 | 2 | 2.33 GHz | 4 MB L2 Cache | 65W | 65 nm | 2006 |
| Intel Xeon LV 5148 | 2 | 2.33 GHz | 4 MB L2 Cache | 40W | 65 nm | 2006 |
| Intel Xeon E5345 | 4 | 2.33 GHz | 8 MB L2 Cache | 80W | 65 nm | 2007 |
| Intel Xeon E5410 | 4 | 2.33 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon L5410 | 4 | 2.33 GHz | 12 MB L2 Cache | 50W | 45 nm | 2008 |
| Intel Xeon E5220 | 2 | 2.33 GHz | 6 MB L2 Cache | 65W | 45 nm | 2008 |
| Intel Xeon X3210 | 4 | 2.13 GHz | 8 MB L2 Cache | 105W | 65 nm | 2007 |
| Intel Xeon LV 5138 | 2 | 2.13 GHz | 4 MB L2 Cache | 35W | 65 nm | 2006 |
| Intel Xeon L5408 | 4 | 2.13 GHz | 12 MB L2 Cache | 40W | 45 nm | 2008 |
| Intel Xeon E5335 | 4 | 2.00 GHz | 8 MB L2 Cache | 80W | 65 nm | 2007 |
| Intel Xeon E5405 | 4 | 2.00 GHz | 12 MB L2 Cache | 80W | 45 nm | 2007 |
| Intel Xeon E5320 | 4 | 1.86 GHz | 8 MB L2 Cache | 80W | 65 nm | 2006 |
| Intel Xeon LV 5128 | 2 | 1.86 GHz | 4 MB L2 Cache | 40W | 65 nm | 2006 |
| Intel Xeon E5205 | 2 | 1.86 GHz | 6 MB L2 Cache | 65W | 45 nm | 2007 |
| Intel Xeon E5310 | 4 | 1.60 GHz | 8 MB L2 Cache | 80W | 65 nm | 2006 |
Frequently asked questions
What is the best processor for LGA 775?
The Intel Core 2 Quad Q9650 is considered to be one of the best CPUs for the LGA 775 socket. It has four cores, a clock speed of 3.0 GHz, and a 12MB cache. It’s also compatible with most motherboards and offers good performance for a wide range of tasks. However, as this socket is quite old, newer and more powerful options are available in the market.
Compatibility of processors between LGA 771 and LGA 775 sockets
The LGA 771 and LGA 775 sockets are similar in many ways, but they are not directly compatible with each other. However, it is possible to modify certain LGA 771 Xeon processors to work with LGA 775 motherboards.
Xeon builds
Xeon builds on this socket are no longer relevant, but for a nearly decade-old processor, Xeon performs quite well. Almost all games released before 2014 can be played smoothly. However, there may be performance issues with games released in 2015-2016, and overclocking is recommended to at least 3.6 GHz. For comfortable frame rates in newer games, it is recommended to consider more modern sockets.
| Previous socket | Next socket |
|---|---|
| Not available | LGA 1366 CPU list |
After spending hours looking over hundreds of web site pages your site seems closest thing to maybe someone who might know some answers that would help me. I have 2 old custom built Windows computers. Both have Intel D955Xbk motherboards with Intel 830 Pentium D processors — Lga775 sockets. I had hoped to find a newer and more powerful processor that would still fit the old D955Xbk board (ATA size). Intel site is impossible to find useful information unless you have new computers. I just cannot find a spreadsheet that shows old Motherboards and compatible processors. I thought such would be somewhere on the internet as many computer people get involved in upgrades of their systems. Would you know of any links that could assist me in finding some compatibility information. Very good article you put together. My Intel 830 processor may be too old to have gotten on the list you had. Any help would be appreciated
Thank you for your comment.
I looked up your question and searched the public domain for information:
Intel D955XBK supports processors – Intel Pentium 4, Intel Pentium 4 Extreme Edition, Intel Pentium D, Intel Pentium Extreme Edition.
You have Pentium D 830 processor, 3 GHz, 800 MHz FSB, 2×1 MB.
For example, the most powerful Pentium D is number 940, 3.2 GHz, 800 MHz FSB, 2×2 MB. It turns out that the benefit is not big.
Also supported Intel Pentium Extreme Edition 965 – 3.73 GHz, 1066 MHz FSB, 2×2 MB. It’s the most powerful processor for LGA 775 (if you don’t know about Xeon).
Its higher frequency is the maximum frequency your Intel D955XBK board can support. (Please note that if the board can detect the processor correctly but give out 800 MHz, it may require the power saving feature to be disabled in the BIOS to take 1066 MHz).
Your motherboard may also support an Intel Xeon server, the most powerful for your 955X chipset is the Xeon X3230. This is the best option for motherboards running at FSB speeds up to 1066 MHz.
The X3230 specifications are 2.67 GHz, 8 MB, 1066 MHz. The CPU frequency is lower than Intel Pentium Extreme Edition 965, but the Xeon X3230 has 4 cores.
But this is also a small performance boost and there are installation difficulties, you may need to upgrade your BIOS and so on. Updates are hard to find too. There are more powerful processors available for LGA 775 such as the Xeon 5000 series but your motherboard will not support them.
My opinion: Leave your old processor if it works. Better yet, find a lightweight operating system that requires fewer resources. Linux Lite, Windows XP Lite, Windows 7 Lite.
Recommendations if you want to keep looking for information: Try using a translator to google Ukrainian and Russian. According to Google Trends, there are the most numerous fans of Xeon processors and LGA 775 socket. There is a whole trend among young people in these countries where they revive and overclock old computers. I can also send links to such resources to your e-mail.
what type processor core i5 or i7 for socket LGA 775? because on the box of motherboard there is say i can use core i7 for that
Core i5, i7 released in 2008 and 2009. LGA775 socket in 2004. Are you sure that your motherboard is on the LGA775 socket?