Intel Core i5-1145G7E vs Intel Core i7-5775C Comparison

Where Each One Wins

The recorded benchmarks show a clean sweep: the Intel Core i5-1145G7E wins all six head-to-head tests. There is no benchmark category where the Intel Core i7-5775C takes the lead. The closest margin is in Cinebench R15 single-core, where the i5-1145G7E leads by 12.3 percent, while the largest margins sit at 12.9 percent in Cinebench R20 multi-core, R23 multi-core, and R23 single-core. The i7-5775C never comes within a single-digit percentage gap, which indicates that the performance difference is consistent across both single-threaded and multi-threaded workloads.

That said, the use-case split is not about which CPU wins a given test, but about what each platform offers outside of raw compute. The i7-5775C is a desktop part on Intel Socket 1150 with a 65 watt TDP, an unlocked multiplier, and 16 PCIe Gen 3 lanes from the CPU. The i5-1145G7E is a mobile part on Intel BGA 1449 with a 28 watt TDP, a locked multiplier, and 4 PCIe Gen 4 lanes from the CPU. If the workload is heavily compute-bound, the i5-1145G7E is the stronger chip in every recorded benchmark. If the workload involves a desktop platform with more expansion headroom, the i7-5775C offers the socket and PCIe connectivity advantage, though that is not reflected in compute scores.

The average benchmark scores place the two CPUs close in the database overall: the i7-5775C averages 2224, while the i5-1145G7E averages 2174. Both sit at the 47th percentile among all CPUs. That means despite the i5-1145G7E winning every head-to-head test, the broader database average is nearly identical, because the i7-5775C has Geekbench scores that are not matched by the i5-1145G7E in the head-to-head list. The i7-5775C records a Geekbench multi-core score of 4989 and a single-core score of 1441, while the i5-1145G7E has no Geekbench entries in the data. The head-to-head tests only cover Cinebench R15, R20, and R23, so the Geekbench results are excluded from the direct comparison.

Architecture Differences

The two processors come from different architectural generations and process nodes. The i7-5775C uses Broadwell, built on a 14 nm process with a die size of 182 mm². The i5-1145G7E uses Tiger Lake, specifically Willow Cove-U, built on a 10 nm process with a die size of 144 mm². Intel produced both, but the newer Tiger Lake design is smaller in die area.

Cache layouts differ significantly. The i7-5775C has 64 KB of L1 per core, 256 KB of L2 per core, and 6 MB of shared L3. The i5-1145G7E has 80 KB of L1 per core, 1.25 MB of L2 per core, and 8 MB of shared L3. The i5-1145G7E has more L1, dramatically more L2 per core (roughly five times), and 2 MB more shared L3. Both CPUs have 4 cores and 8 threads, but the i5-1145G7E's per-core cache allocation is larger, which likely contributes to its higher single-thread scores.

Clock speeds tell a different story. The i7-5775C has a base clock of 3.30 GHz and a boost clock of 3.70 GHz. The i5-1145G7E has a base clock of 1500.00 MHz (which is 1.50 GHz) and a boost clock of 4.10 GHz. The i5-1145G7E has a much lower base clock but a significantly higher boost clock, a typical trade-off for a mobile part designed to conserve power when idle. The i7-5775C runs at a higher sustained base, but its boost ceiling is lower.

Memory support differs by generation. The i7-5775C supports DDR3 in dual-channel configuration with a memory bandwidth of 25.6 GB/s. The i5-1145G7E supports DDR4 and LPDDR4X in dual-channel, with no memory bandwidth figure recorded in the database. Neither CPU supports ECC memory.

The integrated graphics differ as well. The i7-5775C pairs with Iris Pro Graphics 6200, while the i5-1145G7E uses Iris Xe Graphics G7 80EU. The two are not directly benchmarked in the data, but the i5-1145G7E's integrated GPU is from a later generation with a different execution unit count.

The Verdict

Based strictly on the recorded data, the Intel Core i5-1145G7E is the faster CPU in every direct benchmark comparison. It leads by 12.8 percent in Cinebench R15 multi-core and 12.3 percent in single-core. It leads by 12.9 percent in Cinebench R20 multi-core and 12.8 percent in single-core. It leads by 12.9 percent in Cinebench R23 multi-core and 12.9 percent in single-core. If the task is pure compute, the i5-1145G7E is the clear choice.

The Intel Core i7-5775C is the better choice only if the platform matters more than the compute scores. It is a desktop part with an unlocked multiplier, 16 PCIe Gen 3 lanes from the CPU, and support for DDR3 memory. The i5-1145G7E is a mobile part with a locked multiplier, 4 PCIe Gen 4 lanes, and support for DDR4 and LPDDR4X. For a desktop build with expansion cards, the i7-5775C offers more connectivity. For a compact mobile system, the i5-1145G7E offers lower TDP and higher boost clocks.

The database shows both CPUs at the 47th percentile, and the average benchmark scores are close: 2224 for the i7-5775C versus 2174 for the i5-1145G7E. This indicates that the i7-5775C performs better on Geekbench, where it has recorded scores, while the i5-1145G7E performs better on Cinebench. The verdict depends on which benchmark suite matters more to the user. For Cinebench-heavy workloads, the i5-1145G7E wins. For Geekbench-heavy workloads, the i7-5775C has the recorded edge, though no direct head-to-head Geekbench comparison exists in the data.

FAQ

Q: Which CPU has the higher boost clock?

A: The Intel Core i5-1145G7E has a boost clock of 4.10 GHz, while the Intel Core i7-5775C has a boost clock of 3.70 GHz.

Q: Do both CPUs have the same core and thread count?

A: Yes, both have 4 cores and 8 threads.

Q: Which CPU has more L3 cache?

A: The Intel Core i5-1145G7E has 8 MB of shared L3, while the Intel Core i7-5775C has 6 MB of shared L3.

Q: What is the TDP difference?

A: The Intel Core i7-5775C has a TDP of 65 watts, and the Intel Core i5-1145G7E has a TDP of 28 watts.

Q: Which CPU wins in Cinebench R23 multi-core?

A: The Intel Core i5-1145G7E wins with a score of 7516 versus 6549 for the Intel Core i7-5775C, a 12.9 percent lead.

Q: Are both CPUs unlocked for overclocking?

A: No, the Intel Core i7-5775C has an unlocked multiplier, while the Intel Core i5-1145G7E has a locked multiplier.

Head-to-Head Benchmarks

The head-to-head data covers six Cinebench tests, and the Intel Core i5-1145G7E wins every one. In Cinebench R15 multi-core, the i5-1145G7E scores 757 against 660 for the i7-5775C, a 12.8 percent gap. In Cinebench R15 single-core, the i5-1145G7E scores 106 against 93, a 12.3 percent gap. The margins widen slightly in R20 and R23. In Cinebench R20 multi-core, the i5-1145G7E scores 3156 versus 2750, a 12.9 percent gap. In R20 single-core, it scores 445 versus 388, a 12.8 percent gap. In Cinebench R23 multi-core, the i5-1145G7E scores 7516 versus 6549, a 12.9 percent gap. In R23 single-core, it scores 1061 versus 924, also a 12.9 percent gap.

The consistency of the margins is notable. The smallest lead is 12.3 percent in R15 single-core, and the largest is 12.9 percent in four separate tests. There is no test where the i7-5775C comes close. The i5-1145G7E's higher boost clock and larger cache per core likely explain the pattern, though the database does not provide direct causal evidence.

The i7-5775C does have recorded Geekbench scores that are not part of the head-to-head set. It scores 4989 in Geekbench multi-core and 1441 in single-core. The i5-1145G7E has no Geekbench scores in the data, so a direct comparison on that benchmark is not possible. This means the head-to-head results are Cinebench-specific, and the broader average benchmark score (2224 for the i7-5775C versus 2174 for the i5-1145G7E) suggests the i7-5775C holds its own in other workloads.

Specification Differences

The two CPUs differ in nearly every specification field except core count, thread count, and ECC support. The i7-5775C has a base clock of 3.30 GHz, while the i5-1145G7E has a base clock of 1500.00 MHz. The boost clocks are 3.70 GHz versus 4.10 GHz. The TDP is 65 watts versus 28 watts. The socket is Intel Socket 1150 versus Intel BGA 1449. The architecture is Broadwell versus Tiger Lake, and the process node is 14 nm versus 10 nm. The die size is 182 mm² versus 144 mm².

Cache differs across all levels. The i7-5775C has 64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3. The i5-1145G7E has 80 KB L1 per core, 1.25 MB L2 per core, and 8 MB shared L3. Memory support is DDR3 for the i7-5775C versus DDR4 and LPDDR4X for the i5-1145G7E. The memory bus is dual-channel for both, but the i7-5775C has a recorded memory bandwidth of 25.6 GB/s, while the i5-1145G7E has no bandwidth figure. PCIe support is Gen 3 with 16 lanes for the i7-5775C versus Gen 4 with 4 lanes for the i5-1145G7E. Integrated graphics are Iris Pro Graphics 6200 versus Iris Xe Graphics G7 80EU. The i7-5775C has an unlocked multiplier, while the i5-1145G7E is locked. The i7-5775C launched with a release date in 2015, while the i5-1145G7E launched in 2020. The launch MSRP for the i7-5775C is $366, and the launch MSRP for the i5-1145G7E is $312. The market segments are Desktop and Mobile, respectively.