Intel Core i7-950 vs Intel Xeon X5570 Comparison

Head-to-Head Benchmarks

The recorded benchmark data shows a remarkably consistent pattern: the Intel Xeon X5570 wins every single Cinebench test in the head-to-head comparison, though by margins that are almost negligible. The Xeon X5570 takes the win in all five recorded tests, while the Core i7-950 does not secure a single victory. This is not a story of one processor dominating another; it is a story of near-identical performance with a slight edge going to the server part.

Starting with the multi-core tests, the Xeon X5570 scores 283 points in Cinebench R15 multi-core, while the Core i7-950 manages 280 points. That is a 1.1% advantage for the Xeon. The same 1.1% delta appears in Cinebench R20 multi-core, where the Xeon posts 1180 points against the i7-950's 1167 points. In Cinebench R23 multi-core, the gap remains consistent at 1.1%, with the Xeon scoring 2810 and the i7-950 scoring 2780. These are tight margins, but they are consistent across all three rendering workloads.

The single-core results tell the same story. In Cinebench R20 single-core, the Xeon X5570 scores 166 points, a 1.2% lead over the i7-950's 164 points. In Cinebench R23 single-core, the Xeon scores 396 against 392, a 1% edge. The single-core deltas are slightly larger than the multi-core ones, but still within the noise level for most real-world use cases.

The average benchmark scores reflect this near-parity. The Xeon X5570 holds an average benchmark score of 967, while the i7-950 sits at 957. That is a difference of exactly 10 points, or roughly 1%. In the broader database context, both processors sit at the 26th percentile among all CPUs, meaning they are positioned in the same performance tier. The nearest rivals for the Xeon X5570 include the AMD Ryzen 7 3700U at 968 points (a 0.1% difference), the Intel Celeron N5100 at 966 points (0.1% difference), and the Intel Core i5-2400S at 968 points (0.1% difference). For the i7-950, the nearest rival is the AMD Opteron 4386 at 957 points with a 0% delta, followed by the AMD Athlon X4 870K and Intel Xeon W3550, both at 956 points with a 0.1% difference.

FAQ

Q: Which processor wins more benchmark tests?

A: The Intel Xeon X5570 wins all five recorded head-to-head benchmarks, including Cinebench R15, R20, and R23 in both multi-core and single-core tests. The Core i7-950 has zero wins.

Q: Is the performance difference between the two significant?

A: No, the differences are minimal. The Xeon X5570 leads by 1.1% in multi-core tests and by 1.0% to 1.2% in single-core tests across Cinebench versions. The average benchmark scores are 967 for the Xeon and 957 for the i7-950, which places both at the same 26th percentile among all CPUs.

Q: Are these chips comparable in terms of core and thread counts?

A: Yes, both processors have 4 cores and 8 threads. They also share the same 45 nm process node, 731 million transistors, 263 mm² die size, and identical cache configurations: 64 KB L1 per core, 256 KB L2 per core, and 8 MB shared L3.

Q: What is the power draw difference?

A: The Xeon X5570 has a 95 watt TDP, while the Core i7-950 has a 130 watt TDP. That makes the Xeon 35 watts lower in power draw, which can matter for cooling and system power budgets.

Q: Do both support the same memory configuration?

A: Both support DDR3 memory with triple-channel memory bus. The Xeon X5570 has a listed memory bandwidth of 32.0 GB/s, while the i7-950's memory bandwidth field is not recorded.

Q: Which one supports ECC memory?

A: Only the Xeon X5570 supports ECC memory. The Core i7-950 does not list ECC support. The Xeon also has a launch MSRP of $1386, while the i7-950 has no recorded launch price.

Where Each One Wins

The Xeon X5570 wins in every benchmark category recorded, but the practical takeaway depends on the use case. For multi-core rendering workloads like Cinebench R15, R20, and R23, the Xeon is consistently ahead by 1.1%. That margin is small but uniform, meaning if you run many similar rendering jobs, the Xeon will finish each one slightly faster. Over a long batch of renders, that 1.1% accumulates into real time saved. The Xeon's single-core wins of 1.0% to 1.2% also give it a slight edge in lightly threaded tasks, which is unusual for a server part, but in this case the architecture is identical, so the difference comes down to clock behavior rather than a different design.

The i7-950 does not win a single benchmark test in the database. There is no usage scenario where the recorded data shows it outperforming the Xeon. However, it is not a poor processor by any means. Its performance is within 1.1% of the Xeon in all tests, and its average score of 957 places it in the same percentile as the Xeon. For a desktop user with no need for ECC memory and no interest in server-specific features, the i7-950 is functionally equivalent for most workloads. The Xeon wins, but it wins by a hair.

The use-case split is not about performance, it is about the surrounding feature set. The Xeon is a server and workstation part with ECC memory support. The i7-950 is a desktop part without ECC. If the machine runs a home server or workstation that requires error-correcting memory, the Xeon is the only choice. If the machine is a purely consumer desktop, the i7-950's lack of ECC is irrelevant, and its lower average score of 957 versus 967 is not a reason to choose one over the other.

Specification Differences

The two processors differ in several key fields. The base clock is one of them: the Xeon X5570 runs at 2.93 GHz, while the i7-950 runs at 3.07 GHz. The boost clock is identical at 3.33 GHz for both. The TDP differs substantially: the Xeon draws 95 watts, the i7-950 draws 130 watts. That is a 35 watt difference in favor of the Xeon.

Memory bandwidth is recorded for the Xeon at 32.0 GB/s, while the i7-950 has no listed bandwidth. ECC memory support is present on the Xeon and absent on the i7-950. The market segment differs: the Xeon is a Server/Workstation part, the i7-950 is a Desktop part. The launch MSRP is only recorded for the Xeon at $1386; the i7-950 has no launch MSRP value. The part numbers are also different: the Xeon is SLBF3, the i7-950 is SLBEN. Both are end-of-life products, have no integrated graphics, are locked, and use the same Intel Socket 1366 and PCIe Gen 2.

Architecture Differences

Both processors are built on the same Nehalem architecture, but they come from different codenames. The Xeon X5570 uses the Gainestown codename and belongs to the Xeon (Gainestown) generation. The i7-950 uses the Bloomfield codename and belongs to the Core i7 (Bloomfield) generation. The underlying die, however, is identical: both have 731 million transistors and a 263 mm² die size. The process node is 45 nm for both, and both are manufactured by Intel.

Cache allocations are also identical. Each core has 64 KB of L1 and 256 KB of L2, and there is 8 MB of shared L3 cache. The core and thread configuration is the same: 4 cores and 8 threads. The memory support is DDR3 with triple-channel bus on both. The PCIe generation is Gen 2 on both. No integrated graphics are present on either.

The architecture differences are therefore limited to the codename and the specific market positioning. The Xeon is the server derivative of Nehalem, while the i7-950 is the desktop flagship of the same generation. The main functional architectural distinction is ECC memory support, which is a feature of the Xeon's memory controller but not the i7-950's. The transistor count, die size, cache hierarchy, and memory bus are identical, which explains why the benchmark scores are so close.

The Verdict

The data points clearly in one direction if you are choosing strictly on performance: the Intel Xeon X5570 wins every recorded benchmark. It takes the top spot in all five tests, with margins of 1.0% to 1.2%. The average benchmark score is 967 for the Xeon against 957 for the i7-950. In terms of raw rendering performance, the Xeon is the better chip, and it does so while consuming 35 watts less power (95 W vs 130 W). The Xeon also brings ECC memory support, which is a requirement for certain server and workstation setups. For a machine that needs error-correcting memory, the Core i7-950 is not an option at all.

However, for a desktop user who does not need ECC and does not care about the 35 watt power difference, the choice is nearly a coin flip. The i7-950 has a higher base clock (3.07 GHz vs 2.93 GHz), which gives it a nominal advantage in clock-sensitive tasks, but the recorded single-core benchmarks show the Xeon winning by 1.0% to 1.2% despite the lower base clock. The boost clock is identical at 3.33 GHz, and the architecture is the same, so the real-world difference is within the margin of error for most applications.

The verdict depends on the use case. If the build is a server, workstation, or any system that benefits from ECC memory, choose the Intel Xeon X5570. It is the only one of the two that supports ECC, it has a lower TDP, and it edges out the i7-950 in every benchmark. If the build is a consumer desktop with no ECC requirement, the Core i7-950 is a perfectly reasonable choice, but the recorded data does not show it winning anywhere. The Xeon X5570 is the objectively faster processor in the database, even if the lead is small. Pick the Xeon for the full feature set, or pick the i7-950 if the desktop-specific positioning matters to you, but do not expect a performance difference big enough to feel in daily use. Both are end-of-life parts with identical cores, threads, and cache. The Xeon is the safer bet for a system that must handle both rendering and server duties.