CPU Comparison
Intel Core i5-3330
Xeon D-1527
PERFORMANCE BENCHMARKS
Analysis: Intel Core i5-3330 vs Intel Xeon D-1527
The Verdict
The data is unambiguous: the Intel Xeon D-1527 wins every single head-to-head benchmark against the Intel Core i5-3330. Out of five Cinebench tests, the Xeon takes all five, with margins ranging from 19.7% to 19.9%. If you are choosing strictly on compute performance, the Xeon D-1527 is the only option that makes sense. It delivers roughly a fifth more performance in both single-threaded and multi-threaded workloads, while doing so at less than half the power draw (35W TDP versus 77W). The Core i5-3330's only saving grace is its age and platform, it uses the common Socket 1155 and includes integrated graphics, which the Xeon lacks entirely. For a builder upgrading an old desktop, the i5-3330 might fit an existing motherboard. But for anyone assembling a new system or a low-power server, the Xeon D-1527 is the clear pick. The benchmark averages confirm the gap: the Xeon scores 1207 on average, while the i5 sits at 1200, a slim 0.6% difference in aggregate, but the per-test deltas tell a more consistent story of Xeon superiority.
Architecture Differences
The two CPUs come from different eras and design philosophies. The Intel Xeon D-1527 is built on Broadwell architecture, using a 14nm process node from Intel's own foundry. It packs 3,200 million transistors into a 246 mm² die. The Core i5-3330, by contrast, uses Ivy Bridge on a 22nm node, with a much smaller 133 mm² die and no transistor count listed. The node difference explains part of the efficiency gap, the Xeon delivers more performance at 35W TDP versus 77W for the i5.
Core counts are identical at four, but threading differs. The Xeon D-1527 supports 8 threads via Hyper-Threading, while the i5-3330 is limited to 4 threads. This is a major reason the Xeon leads in multi-core tests. Cache layouts also differ: the Xeon provides 1.5 MB of L3 per core (totaling roughly 6 MB across four cores), while the i5 has 6 MB shared L3. L1 and L2 are the same per-core (64 KB and 256 KB respectively).
Memory support is another divider. The Xeon D-1527 handles both DDR3 and DDR4 in dual-channel configuration, and it supports ECC memory, a critical feature for server reliability. The i5-3330 only supports DDR3, dual-channel, with no ECC. PCIe lanes also favor the Xeon: 24 lanes of Gen 3 versus 16 lanes on the i5. The Xeon targets the server/workstation segment with a BGA 1667 socket, while the i5 is a desktop part on Socket 1155. The i5 includes Intel HD 2500 integrated graphics; the Xeon has none, relying on a discrete GPU or headless operation. Release dates are far apart too: the Xeon launched on 2015-10-31, the i5 on 2012-09-02.
Head-to-Head Benchmarks
The Xeon D-1527 wins every benchmark in the head-to-head table, and the margins are remarkably consistent. In Cinebench R15 multi-core, the Xeon scores 420 against the i5's 351, a 19.7% advantage. That pattern repeats almost exactly in R20 multi-core: 1753 versus 1464, again 19.7%. The R23 multi-core test shows 4176 versus 3486, a 19.8% gap. Single-threaded results tell the same story. In R20 single-core, the Xeon posts 247 versus 206, a 19.9% win. R23 single-core sees 589 against 492, a 19.7% edge.
What's notable is that the single-core advantage is nearly as large as the multi-core one. That suggests the Xeon's clock speed and architecture efficiency overcome the i5's higher base clock (3.00 GHz versus 2.20 GHz) and boost clock (3.20 GHz versus 2.70 GHz). The i5 starts at a higher frequency but still loses single-threaded tests by roughly 20%. The Xeon's newer 14nm process and Broadwell design clearly deliver more instructions per clock. Across the five benchmarks, the smallest delta is 19.7% and the largest is 19.9%, this is not a fluke of one test. The Xeon is uniformly faster in every scenario measured.
FAQ
Q: Which CPU is faster in multi-threaded workloads?
A: The Intel Xeon D-1527 wins all three multi-core Cinebench tests. In R15 multi-core, it scores 420 versus 351 (19.7% ahead). In R20 multi-core, it scores 1753 versus 1464 (19.7% ahead). In R23 multi-core, it scores 4176 versus 3486 (19.8% ahead).
Q: Does the Core i5-3330 win any benchmark?
A: No. According to the head-to-head data, the Core i5-3330 wins zero of five tests. The Xeon D-1527 wins all five, with deltas between 19.7% and 19.9%.
Q: Which CPU supports ECC memory?
A: Only the Intel Xeon D-1527 supports ECC memory. The Core i5-3330 does not list ECC support. This makes the Xeon the only choice for error-correcting memory in server or workstation builds.
Q: Which CPU has integrated graphics?
A: The Core i5-3330 includes Intel HD 2500 integrated graphics. The Xeon D-1527 lists no integrated graphics, so a discrete GPU is required for display output.
Q: How do their power draws compare?
A: The Xeon D-1527 has a 35W TDP, while the Core i5-3330 has a 77W TDP. The Xeon draws less than half the power while delivering higher benchmark scores.
Q: Which CPU supports DDR4 memory?
A: The Xeon D-1527 supports both DDR3 and DDR4. The Core i5-3330 only supports DDR3. This gives the Xeon a path to newer, potentially faster memory.
Where Each One Wins
The Intel Xeon D-1527 wins in every measurable performance category, but its advantages go beyond raw scores. The 35W TDP makes it suitable for compact, low-power server builds where heat and electricity are concerns. ECC memory support is a hard requirement for many data-integrity-sensitive workloads like databases or file servers. The dual memory support (DDR3 and DDR4) offers flexibility when reusing old RAM or buying new. The 24 PCIe Gen 3 lanes provide more headroom for expansion cards, NVMe drives, or network adapters compared to the i5's 16 lanes. The Xeon's server/workstation market segment and active production status mean it remains a viable current purchase. Its launch MSRP was $213.
The Core i5-3330's wins are more situational. Its Socket 1155 platform is an older, widely used desktop socket, if you already own a compatible motherboard, dropping in an i5-3330 is a low-friction upgrade path. The integrated Intel HD 2500 graphics means you can build a basic desktop without a discrete GPU, which is impossible with the Xeon. The i5 also has a higher base clock (3.00 GHz versus 2.20 GHz) and boost clock (3.20 GHz versus 2.70 GHz), which might help in lightly threaded legacy software that responds to raw frequency, though the benchmark data shows the Xeon still wins single-core tests by nearly 20%, so this advantage is theoretical rather than measured. For a purely desktop use case with an existing 1155 board and no need for ECC, the i5 is the pragmatic choice. For anything else, servers, workstations, or new builds, the Xeon D-1527 dominates.
The percentile rankings are identical (34th for both), placing them in the same tier among all CPUs. But within that tier, the Xeon consistently outperforms the i5 by a wide margin. The average benchmark scores (1207 versus 1200) understate the per-test differences because they aggregate across different test versions. The head-to-head data is more telling: five wins for the Xeon, zero for the i5, with every margin above 19%. If you need the best performance per watt, the Xeon wins outright. If you need integrated graphics and a legacy socket, the i5 has a narrow niche. Otherwise, the choice is clear.
Specification Differences
| Specification | Intel Xeon D-1527 | Intel Core i5-3330 |
|---|---|---|
| Cores | 4 | 4 |
| Threads | 8 | 4 |
| Base Clock | 2.20 GHz | 3.00 GHz |
| Boost Clock | 2.70 GHz | 3.20 GHz |
| TDP | 35W | 77W |
| Socket | Intel BGA 1667 | Intel Socket 1155 |
| Architecture | Broadwell | Ivy Bridge |
| Process Node | 14 nm | 22 nm |
| Transistors | 3,200 million | Not listed |
| Die Size | 246 mm² | 133 mm² |
| L3 Cache | 1.5 MB per core | 6 MB shared |
| Memory Support | DDR3, DDR4 | DDR3 |
| ECC Memory | Yes | No |
| PCIe Lanes | Gen 3, 24 Lanes | Gen 3, 16 Lanes |
| Integrated Graphics | None | Intel HD 2500 |
| Market Segment | Server/Workstation | Desktop |
| Release Date | 2015-10-31 | 2012-09-02 |
| Launch MSRP | $213 | Not listed |
| Part Number | SR2DK | SR0RQ |
The table highlights the fundamental differences. The Xeon D-1527 trades higher clock speeds for more threads, lower power, and server features. The i5-3330 relies on its higher clocks and integrated graphics for desktop appeal. The Xeon's 14nm process versus 22nm explains the efficiency gap. The i5's larger L3 cache (6 MB shared versus 1.5 MB per core) could help in some cache-sensitive workloads, but the benchmark results do not show any test where that translates into a win. The Xeon's extra PCIe lanes, ECC support, and DDR4 compatibility make it the more future-proof and capable part for serious workloads. The i5's only unique advantage is the integrated GPU and the older socket, both of which matter only in a narrow desktop-upgrade scenario.