Intel Core i7-4790T vs Intel Xeon E5-2637 v3 Comparison

The Intel Xeon E5-2637 v3 and the Intel Core i7-4790T are both quad-core, eight-thread Haswell parts, but they target opposite ends of the performance-per-watt spectrum. The Xeon is a server/workstation processor built for sustained throughput, while the Core i7 is a low-power desktop chip designed for efficiency. Benchmark data shows a clear, consistent winner in raw compute: the Xeon E5-2637 v3 takes all six head-to-head Cinebench tests, with margins ranging from 14% to 14.5%. However, the i7-4790T counters with a significantly lower 45W TDP, a higher 3.90 GHz boost clock, and integrated graphics, making it the more versatile and power-conscious option.

Where Each One Wins

The Xeon E5-2637 v3 wins every single benchmark category in the head-to-head comparison, making it the undisputed performance champion for multi-threaded and single-threaded workloads alike. In Cinebench R15 multi-core, it scores 617 against the i7-4790T’s 541, a 14% advantage. That lead persists across R20 (2574 vs 2258) and R23 (6130 vs 5378), all at a consistent 14% delta. Single-core results follow the same pattern: the Xeon leads by 14.5% in R15 (87 vs 76) and by roughly 14% in R20 (363 vs 318) and R23 (865 vs 759). For any task that relies on CPU compute—rendering, encoding, simulation—the Xeon is the clear winner, with no test in the data showing the i7 ahead.

The Core i7-4790T’s wins are not in raw performance but in platform characteristics. It has a 45W TDP versus the Xeon’s 135W, meaning it generates far less heat and requires a much lighter cooling solution. It also features Intel HD 4600 integrated graphics, which the Xeon lacks entirely, allowing for a display output without a discrete GPU. The i7 uses the mainstream Intel Socket 1150 platform with dual-channel DDR3 memory, while the Xeon requires the more expensive Socket 2011-3 platform with quad-channel DDR4. For a compact desktop or a low-power home server, the i7-4790T’s efficiency and integrated graphics make it the more practical choice, even though it loses every compute benchmark.

Architecture Differences

Both processors are built on Intel’s 22 nm Haswell architecture, but they are distinct dies with different configurations. The Xeon E5-2637 v3 is a Haswell-EP part, a server-class design with 2,600 million transistors on a 356 mm² die. It supports DDR4 memory across a quad-channel bus, delivering 68.3 GB/s of memory bandwidth, and includes ECC memory support for error-correcting reliability. Its PCIe implementation is Gen 3 with 40 lanes from the CPU, enabling extensive expansion for workstation or server use. The Xeon has a 15 MB shared L3 cache, which is nearly double the i7’s allocation, and a base clock of 3.50 GHz with a boost of 3.70 GHz.

The Core i7-4790T is a mainstream Haswell part, with 1,400 million transistors on a 177 mm² die—roughly half the transistor count and die size of the Xeon. It uses dual-channel DDR3 memory with a 25.6 GB/s bandwidth cap, no ECC support, and only 16 PCIe Gen 3 lanes. Its L3 cache is 8 MB shared, and it runs at a lower 2.70 GHz base clock but a higher 3.90 GHz boost clock. The i7 also integrates Intel HD 4600 graphics, which is absent on the Xeon. The process node is identical at 22 nm, but the Xeon’s larger die and server-oriented features—quad-channel memory, ECC, and 40 PCIe lanes—reflect its workstation pedigree, while the i7’s smaller die and 45W TDP target efficiency and mainstream compatibility.

The memory support difference is critical. The Xeon’s quad-channel DDR4 interface provides 68.3 GB/s of bandwidth, more than 2.6 times the i7’s 25.6 GB/s with dual-channel DDR3. This bandwidth advantage directly supports the Xeon’s higher multi-core scores, as memory-bound workloads can feed the cores more quickly. The i7’s higher boost clock (3.90 GHz vs 3.70 GHz) does not translate into single-core wins in the data, suggesting the Xeon’s larger cache and superior memory subsystem compensate for its lower maximum frequency. The Xeon’s 15 MB L3 cache versus 8 MB on the i7 is another factor, reducing the need to fetch data from slower system memory.

Head-to-Head Benchmarks

The most decisive victory for the Xeon E5-2637 v3 comes in Cinebench R15 single-core, where it scores 87 against the i7-4790T’s 76, a 14.5% margin. This is notable because the i7 has a higher boost clock (3.90 GHz vs 3.70 GHz), yet the Xeon still wins, likely due to its larger 15 MB L3 cache and more efficient memory architecture. In multi-core R15, the Xeon scores 617 vs 541, a 14% lead, showing that the Xeon’s higher base clock (3.50 GHz vs 2.70 GHz) and superior memory bandwidth translate directly into sustained throughput.

The pattern holds in newer Cinebench versions. In R20 multi-core, the Xeon leads 2574 to 2258 (14%), and in R23 multi-core, it leads 6130 to 5378 (14%). Single-core scores in R20 (363 vs 318, 14.2%) and R23 (865 vs 759, 14%) reinforce the Xeon’s dominance. Across all six benchmarks, the Xeon wins by a minimum of 14%, with no test showing the i7 within single digits. The i7-4790T’s only additional benchmark data comes from Geekbench, where it scores 3520 multi-core and 1193 single-core, but no Geekbench results are provided for the Xeon, so no direct comparison is possible there.

The consistency of the 14% delta across all Cinebench versions suggests the Xeon’s advantage is structural rather than workload-specific. Whether the test is older (R15) or newer (R23), the relative performance gap remains virtually unchanged. This indicates that the Xeon’s quad-channel DDR4 memory and 15 MB L3 cache provide a stable performance uplift over the i7’s dual-channel DDR3 and 8 MB cache across the entire Cinebench suite. The i7’s higher boost clock cannot overcome this architectural deficit, as the Xeon’s higher base clock and memory subsystem deliver more consistent performance under load.

FAQ

Q: Which processor has a higher single-core score in Cinebench R23?

A: The Intel Xeon E5-2637 v3 scores 865 in Cinebench R23 single-core, which is 14% higher than the Intel Core i7-4790T’s 759.

Q: Does the Core i7-4790T have integrated graphics?

A: Yes, the Intel Core i7-4790T includes Intel HD 4600 integrated graphics, while the Intel Xeon E5-2637 v3 has no integrated graphics.

Q: What is the memory bandwidth difference between the two CPUs?

A: The Intel Xeon E5-2637 v3 supports quad-channel DDR4 with 68.3 GB/s of memory bandwidth, while the Intel Core i7-4790T uses dual-channel DDR3 with 25.6 GB/s.

Q: Which processor supports ECC memory?

A: The Intel Xeon E5-2637 v3 supports ECC memory, but the Intel Core i7-4790T does not.

Q: How many Cinebench tests does the Core i7-4790T win against the Xeon?

A: The data shows zero wins for the Intel Core i7-4790T across all six head-to-head Cinebench benchmarks, with the Xeon winning every test.

Q: What is the TDP of each processor?

A: The Intel Xeon E5-2637 v3 has a TDP of 135W, while the Intel Core i7-4790T has a TDP of 45W.

The Verdict

The data is unambiguous for raw CPU performance: the Intel Xeon E5-2637 v3 is the superior processor, winning all six head-to-head Cinebench benchmarks with a consistent 14-14.5% margin. Its 15 MB L3 cache, quad-channel DDR4 memory interface (68.3 GB/s), and higher base clock (3.50 GHz) deliver a structural advantage over the i7-4790T that the latter’s higher boost clock (3.90 GHz) cannot overcome. For users running compute-heavy workloads—rendering, simulation, or multi-threaded compilation—the Xeon is the better choice, despite its higher 135W TDP and lack of integrated graphics. Its ECC memory support and 40 PCIe Gen 3 lanes further cement its position for server and workstation duties.

The Intel Core i7-4790T is the pick for power-sensitive or mainstream desktop builds. Its 45W TDP is one-third of the Xeon’s, allowing for passive cooling or ultra-compact systems. The integrated Intel HD 4600 graphics means it can drive a display without a discrete GPU, a capability the Xeon lacks entirely. While it loses every compute benchmark, its 8 MB L3 cache and dual-channel DDR3 are sufficient for everyday computing, light content creation, and home-server duties. The i7’s Geekbench scores (3520 multi-core, 1193 single-core) provide additional reference points, though no Xeon Geekbench data is available for direct comparison. For a low-power home theater PC or a quiet office system, the i7-4790T’s efficiency and platform simplicity make it the rational choice, but users who prioritize compute performance should look to the Xeon E5-2637 v3.