Intel Core i7-3770 Processor (BX80637I73770): specs and what it fits

The Intel Core i7-3770 (part number BX80637I73770) is a desktop processor from Intel's third-generation Core family, which is commonly called Ivy Bridge. It is an older chip, so it is mostly of interest to people keeping an existing PC going, repairing a machine or building a system around a compatible older motherboard. The listing is brief, giving three headline specs: 3.40GHz, the i7-3770 name and 8MB of cache.

What 3.40GHz means

The clock speed is how many cycles per second the processor's cores run. At 3.40GHz, the listed figure is the base frequency. Generally, a higher clock lets a core finish individual tasks faster, though real performance also depends on the design of the chip, the number of cores and the workload. Chips in this family usually can run above the base figure for short periods when conditions allow, but the listing doesn't give a boost speed, so check Intel's documentation for it.

What 8MB of cache is for

Cache is very fast memory built into the processor. It holds data and instructions the cores are likely to need again, so they don't have to wait for the much slower main memory. The listing gives 8MB, which on processors of this type is shared among the cores. More cache typically helps with tasks that repeatedly reuse the same data.

The "i7" and "3770" in the name

"Core i7" marks the upper tier of Intel's Core lineup of that generation, and the "3" at the start of "3770" identifies the third generation. Processors in this class typically have four cores and eight threads, but the listing doesn't state it, so confirm it against Intel's specifications.

Socket and motherboard fit

The listing doesn't state the socket. Third-generation Core desktop processors typically use the LGA 1155 socket, so the motherboard needs a matching socket and a chipset that supports this processor, and some boards need a BIOS update first. Check the motherboard maker's CPU support list for the exact board. These chips also use DDR3 memory, and they will not fit recent motherboards.

Box contents and cooling

The model number BX80637I73770 is Intel's retail "boxed" code, and boxed processors typically include a cooler, but the listing doesn't say so, so don't assume. Check what is in the package, and fit a suitable cooler with fresh thermal paste if one is not provided. The listed dimensions of 5.0 x 5.7 x 3.2 inches and 0.9 lb (about 0.4 kg) refer to the packaging.

Who it suits

It suits owners of older LGA 1155 systems who want to replace a failed processor or move up from a lower-tier chip in the same family, and builders who are working with legacy parts.

What to check before you buy

• Your motherboard's socket and whether it lists the i7-3770 as supported, and the BIOS version needed.
• Whether a cooler is included, and if not, that the one you have fits the socket.
• Whether your memory is DDR3.
• That your power supply and case suit the processor's heat output.
• Whether the processor has integrated graphics you need; check Intel's specifications.
• That you are comfortable with the age of the platform, since newer operating systems may have their own requirements.

The short version

• An Intel Core i7-3770 desktop processor, listed at 3.40GHz with 8MB of cache.
• A third-generation Core chip, typically for LGA 1155 motherboards.
• The listing is short, so confirm the socket, cores and cooler before buying.
• Best matched to older systems that already support it.

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