AMD Ryzen 5 PRO 3500U vs Intel Core i7-950 Comparison

Intel Core i7-950 vs AMD Ryzen 5 PRO 3500U: two very different approaches to delivering four cores and eight threads. The i7-950 is a legacy desktop part from Intel's Nehalem generation, while the Ryzen 5 PRO 3500U is a modern mobile processor built on Zen+. Despite the age gap, their aggregate benchmark scores land surprisingly close together, making this a comparison about specific workloads rather than raw capability.

Head-to-Head Benchmarks

The database contains one direct head-to-head benchmark result between these two processors: Cinebench R15 multi-core. The AMD Ryzen 5 PRO 3500U scores 624, while the Intel Core i7-950 scores 280. That represents a 55.1% deficit for the Intel part, meaning the Ryzen 5 PRO 3500U delivers more than double the multi-threaded performance in this specific test.

This is the only shared benchmark in the recorded data, and it is a decisive win for AMD. The Ryzen 5 PRO 3500U's Cinebench R15 multi-core score of 624 places it well ahead of the i7-950's 280, a gap that reflects the generational efficiency improvements in instruction execution and memory architecture. The i7-950 has no recorded wins in the head-to-head comparison.

For context beyond the direct matchup, the i7-950's other recorded scores include Cinebench R20 multi-core at 1167, Cinebench R20 single-core at 164, Cinebench R23 multi-core at 2780, and Cinebench R23 single-core at 392. The Ryzen 5 PRO 3500U additionally has Cinebench R15 single-core at 142, Geekbench multi-core at 2202, and Geekbench single-core at 819. These separate test results cannot be directly compared because they are different versions of the same test family or entirely different suites, but they give a sense of each processor's profile.

Where Each One Wins

The AMD Ryzen 5 PRO 3500U wins the only direct benchmark comparison, so the use-case split largely favors it. The Cinebench R15 multi-core result is the clear differentiator: any workload that scales across cores and threads will prefer the Ryzen part. Its 624 score versus 280 indicates strong multi-threaded rendering capability relative to the decade-old Intel design.

The Intel Core i7-950, however, still holds ground in single-threaded legacy workloads based on its recorded Cinebench R20 and R23 single-core scores. Its Cinebench R20 single-core score of 164 and Cinebench R23 single-core score of 392 suggest that for older applications optimized around fewer threads, the i7-950 can remain competitive. The Ryzen 5 PRO 3500U's Cinebench R15 single-core score of 142 is not directly comparable, but the i7-950's higher boost clock of 3.33 GHz versus 3.70 GHz does not tell the full story because architectural IPC differences matter more.

For everyday mobile use, the Ryzen 5 PRO 3500U's lower power envelope and integrated graphics make it the more practical choice, but the data does not contain thermal or battery benchmarks. The recorded scores favor AMD in multi-threaded tasks, while the i7-950's single-core Cinebench numbers indicate it can still handle single-threaded applications from its era without embarrassment.

Architecture Differences

The fundamental architectural gap is massive. The Intel Core i7-950 uses the Nehalem architecture, codenamed Bloomfield, built on a 45 nm process at Intel's foundry. It packs 731 million transistors onto a 263 mm² die. The AMD Ryzen 5 PRO 3500U uses the Zen+ architecture, codenamed Picasso, built on a 12 nm process at GlobalFoundries, with 4,940 million transistors on a 210 mm² die. That is nearly seven times the transistor count on a smaller die, enabled by the much denser manufacturing node.

Cache hierarchy differs significantly. The i7-950 has 64 KB of L1 cache per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. The Ryzen 5 PRO 3500U has 96 KB of L1 per core, 512 KB of L2 per core, but only 4 MB of shared L3. The Intel chip has twice the L3 capacity, but the AMD chip has more per-core L1 and L2, which helps with latency-sensitive workloads.

Memory support is another generational split. The i7-950 uses DDR3 with a triple-channel memory bus, while the Ryzen 5 PRO 3500U uses DDR4 with a dual-channel bus. The Ryzen part has a recorded memory bandwidth of 38.4 GB/s, a figure the i7-950 lacks in the database. PCIe support also differs: Intel has Gen 2, AMD has Gen 3. The Ryzen 5 PRO 3500U includes integrated Radeon Vega 8 graphics, while the i7-950 has no integrated graphics at all, requiring a discrete GPU for any display output.

Specification Differences

The two processors differ on nearly every measurable spec. The i7-950 has a base clock of 3.07 GHz and a boost clock of 3.33 GHz, while the Ryzen 5 PRO 3500U has a base clock of 2.10 GHz and a boost clock of 3.70 GHz. The AMD part's higher boost clock partially compensates for its lower base clock. Thermal design power tells a stark story: the i7-950 is rated at 130 W, the Ryzen 5 PRO 3500U at 15 W. That is an 88% reduction in rated power draw.

Sockets are incompatible: Intel Socket 1366 for the i7-950, AMD Socket FP5 for the Ryzen 5 PRO 3500U. Market segments differ as well: the i7-950 is a Desktop part, the Ryzen 5 PRO 3500U is Mobile. Production status: the i7-950 is end-of-life, the Ryzen 5 PRO 3500U is active. Release dates are a decade apart: June 2009 versus April 2019.

Both parts have four cores and eight threads, neither has an unlocked multiplier, and neither supports ECC memory. The Ryzen 5 PRO 3500U belongs to the 3000 series, while the i7-950 has no series designation. Part numbers are SLBEN for Intel and YM350BC4T4MFG for AMD.

FAQ

Q: Which processor has the higher multi-core Cinebench R15 score?

A: The AMD Ryzen 5 PRO 3500U scores 624 versus the Intel Core i7-950's 280, a 55.1% advantage for AMD.

Q: Do these processors have the same core and thread counts?

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

Q: Which CPU has more L3 cache?

A: The Intel Core i7-950 has 8 MB of shared L3 cache, while the AMD Ryzen 5 PRO 3500U has 4 MB of shared L3 cache.

Q: What is the TDP difference between them?

A: The i7-950 is rated at 130 W, and the Ryzen 5 PRO 3500U is rated at 15 W.

Q: Does either processor include integrated graphics?

A: Only the AMD Ryzen 5 PRO 3500U has integrated graphics, specifically Radeon Vega 8. The i7-950 has none.

Q: Which processor uses a newer PCIe standard?

A: The AMD Ryzen 5 PRO 3500U supports PCIe Gen 3, while the Intel Core i7-950 supports PCIe Gen 2.

The Verdict

The data points to a clear recommendation for most buyers: the AMD Ryzen 5 PRO 3500U is the better processor for modern workloads. Its 55.1% lead in Cinebench R15 multi-core is decisive, and its 15 W TDP versus 130 W makes it far more suitable for any power-conscious system. The Ryzen part also brings integrated graphics, PCIe Gen 3, and DDR4 memory support, all of which are relevant for current platforms.

The Intel Core i7-950 should only be considered if you are maintaining a legacy Socket 1366 system and need a drop-in upgrade from something weaker. Its 8 MB of L3 cache and triple-channel DDR3 support are dated, and its 130 W TDP demands a serious cooler and power delivery. The recorded single-core Cinebench scores (R20 at 164, R23 at 392) show it is not obsolete for single-threaded tasks, but its multi-threaded performance is severely behind.

The percentile rankings are nearly identical: the i7-950 sits at the 26th percentile of all CPUs, the Ryzen 5 PRO 3500U at the 25th. Their average benchmark scores are similarly close: 957 versus 947. This tells you that across a broad database, they land in the same performance class. But the head-to-head result reveals where the real difference lies: modern multi-threaded rendering favors AMD by a wide margin, and the power efficiency gap makes the Ryzen part the only sensible choice for a new build. Pick the i7-950 only if you already own the motherboard and want to squeeze out its last bit of performance. For anything new, the Ryzen 5 PRO 3500U is the clear winner.