Intel Core i5-1035G7 vs Intel Xeon E3-1231 v3 Comparison

The Verdict

The benchmark data is unambiguous: the Intel Core i5-1035G7 wins every recorded head-to-head comparison against the Intel Xeon E3-1231 v3. Across six Cinebench tests, the mobile Ice Lake chip takes all six wins, with margins ranging from 12.8% to 13.1%. The average benchmark score also favors the i5-1035G7 at 1948 versus 1925 for the Xeon, a 1.2% edge in the database's aggregate metric. The i5-1035G7 sits at the 44th percentile among all CPUs, while the Xeon E3-1231 v3 sits at the 43rd percentile.

Buyers should pick the i5-1035G7 for any workload where single-threaded responsiveness or modern efficiency matters. Its Cinebench R23 single-core score of 951 beats the Xeon's 842 by 12.9%, and its R20 single-core result of 399 versus 353 is a 13% improvement. The Xeon E3-1231 v3 remains relevant only for legacy server or workstation sockets, as it is an end-of-life product with a 80 W TDP, DDR3 memory support, and no integrated graphics. The i5-1035G7, by contrast, is an active mobile part with a 15 W TDP, DDR4 support, and Iris Plus graphics, making it the logical choice for new builds, especially lightweight laptops or compact systems.

However, the Xeon does hold one advantage in the data: it supports ECC memory, which the i5-1035G7 does not. For users who require error-correcting memory in a server or workstation context, the Xeon E3-1231 v3 is the only option between the two. But for raw performance, the i5-1035G7 is ahead in every recorded benchmark. The data shows no scenario where the Xeon wins a performance comparison.

Architecture Differences

The two processors come from entirely different eras of Intel silicon. The i5-1035G7 uses the Ice Lake architecture, specifically the Ice Lake-U codename, built on a 10 nm process node. The Xeon E3-1231 v3 uses the Haswell architecture, codename Haswell-WS, built on a 22 nm node. This process gap explains much of the efficiency difference: the i5-1035G7 has a 15 W TDP, while the Xeon consumes 80 W.

Both chips have 4 cores and 8 threads, so the thread count is identical. The cache layouts differ. The i5-1035G7 has 80 KB of L1 cache per core, 256 KB of L2 per core, and 6 MB of shared L3. The Xeon has 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3. The Xeon's larger L3 pool (8 MB versus 6 MB) is offset by the i5's superior per-core L1 capacity.

The memory subsystems are generations apart. The i5-1035G7 supports DDR4 memory with dual-channel operation and a memory bandwidth of 51.2 GB/s. The Xeon supports DDR3 memory, also dual-channel, but with a bandwidth of 25.6 GB/s. That is exactly half the bandwidth of the i5. The Xeon supports ECC memory, the i5 does not.

The integrated graphics situation is stark. The i5-1035G7 includes Iris Plus graphics, while the Xeon has no integrated graphics at all. The Xeon requires a discrete GPU for any display output. The socket types also differ completely: the i5 uses Intel BGA 1526, a soldered mobile socket, while the Xeon uses Intel Socket 1150, a desktop/server LGA socket.

The Xeon's die size is 160 mm² with 1,400 million transistors. The i5's die size is 123 mm², with transistor count not recorded in the database. The Xeon's larger die on an older process explains its higher power draw. The i5's smaller die on a newer node delivers more performance per watt, as the benchmark data confirms.

FAQ

Q: Which processor has the higher single-core performance?

A: The Intel Core i5-1035G7 wins every single-core test. In Cinebench R23 single-core, it scores 951 versus 842 for the Xeon E3-1231 v3, a 12.9% advantage. In R20 single-core, the i5 scores 399 versus 353, a 13% lead.

Q: Does the Xeon E3-1231 v3 support ECC memory?

A: Yes. The database lists ECC memory support as true for the Xeon. The i5-1035G7 does not support ECC memory.

Q: Which chip is more power-efficient?

A: The i5-1035G7 has a TDP of 15 W, while the Xeon E3-1231 v3 has a TDP of 80 W. The i5 delivers higher benchmark scores while drawing far less power.

Q: Can the Xeon E3-1231 v3 output video without a discrete GPU?

A: No. The Xeon has no integrated graphics. The i5-1035G7 includes Iris Plus graphics, so it can handle display output on its own.

Q: How do the memory bandwidth figures compare?

A: The i5-1035G7 supports DDR4 with 51.2 GB/s of memory bandwidth. The Xeon supports DDR3 with 25.6 GB/s. The i5 offers double the bandwidth.

Q: Are both processors still in production?

A: No. The i5-1035G7 is listed as active in production. The Xeon E3-1231 v3 is listed as end-of-life.

Specification Differences

The two CPUs differ on nearly every specification except core count and thread count. The i5-1035G7 has a base clock of 1200 MHz and a boost clock of 3.70 GHz. The Xeon has a base clock of 3.40 GHz and a boost clock of 3.80 GHz. The Xeon has the higher clock speed on paper, but the i5 wins in benchmarks due to architectural efficiency.

The process nodes are 10 nm for the i5 and 22 nm for the Xeon. The i5 has a 123 mm² die; the Xeon has a 160 mm² die. The Xeon's transistor count is 1,400 million; the i5's is not recorded in the database.

Cache configurations differ: L1 is 80 KB per core on the i5 versus 64 KB per core on the Xeon. L2 is identical at 256 KB per core. L3 is 6 MB shared on the i5 versus 8 MB shared on the Xeon.

Memory support is DDR4 for the i5 and DDR3 for the Xeon. Memory bandwidth is 51.2 GB/s for the i5 and 25.6 GB/s for the Xeon. ECC memory is false for the i5 and true for the Xeon.

The i5 has integrated Iris Plus graphics; the Xeon has none. The i5 uses Intel BGA 1526; the Xeon uses Intel Socket 1150. The i5 is a mobile part; the Xeon is a server/workstation part. The i5 is active; the Xeon is end-of-life. Release dates are July 31, 2019 for the i5 and May 10, 2014 for the Xeon. The i5 has no launch MSRP recorded; the Xeon's launch MSRP is $250.

Head-to-Head Benchmarks

The i5-1035G7 sweeps all six recorded Cinebench comparisons. The smallest margin is in Cinebench R15 multicore, where the i5 scores 678 against the Xeon's 601, a 12.8% difference. The largest margin is in R15 single-core, where the i5 scores 95 versus the Xeon's 84, a 13.1% lead.

Multi-core results show consistent dominance. In Cinebench R20 multicore, the i5 scores 2829 versus 2506, a 12.9% win. In Cinebench R23 multicore, the i5 scores 6736 versus 5967, also a 12.9% win. These are not marginal victories; the i5 is roughly 13% faster in every multi-threaded workload.

Single-core results follow the same pattern. Cinebench R20 single-core gives the i5 a 399 score against the Xeon's 353, a 13% advantage. Cinebench R23 single-core gives the i5 951 against the Xeon's 842, a 12.9% win. The consistency across all six tests is striking: the i5's lead never drops below 12.8% and never exceeds 13.1%.

The Xeon's higher boost clock of 3.80 GHz versus the i5's 3.70 GHz does not translate into faster performance. The i5's modern Ice Lake architecture and faster memory subsystem overcome the clock deficit. The Xeon's extra 2 MB of L3 cache also fails to help, as the i5's smaller but faster cache hierarchy proves superior.

The average benchmark scores corroborate the head-to-head results. The i5 averages 1948, while the Xeon averages 1925. The nearest rivals for the i5, such as the Intel Xeon E3-1230 v5 at 1947 and the Intel Core i7-8709G at 1950, are within 0.1% to 0.3% of its score. The Xeon's nearest rivals, including the Intel Core i3-10305T at 1922 and the Intel Core i7-6700T at 1918, are similarly close. Both chips sit in a crowded mid-range cluster, but the i5 sits slightly higher within that cluster.

In summary, the data shows a clean sweep. The i5-1035G7 wins every benchmark, offers double the memory bandwidth, draws a fraction of the power, and includes integrated graphics. The Xeon's only advantages are ECC support, a higher base clock, and a larger L3 cache. For any performance-focused build, the i5 is the clear choice.