Intel Core i3-1315UE vs Intel Core i7-990X Comparison

Where Each One Wins

The recorded benchmark data presents an unusual scenario: the Intel Core i7-990X, a desktop part from 2011, wins all six shared Cinebench tests against the Intel Core i3-1315UE, a mobile processor from 2023. The win margins are consistently narrow, ranging from a 0.8% advantage in Cinebench R15 multi-core to a 1.2% edge in Cinebench R15 single-core. The i7-990X takes the multi-core tests with scores of 611, 2549, and 6071 in Cinebench R15, R20, and R23 respectively, while the i3-1315UE posts 606, 2525, and 6013 on the same tests.

The single-core picture is nearly identical in outcome. The i7-990X leads with 86, 359, and 857 points in Cinebench R15, R20, and R23 single-core runs, against the i3-1315UE's 85, 356, and 849. None of these deltas exceed 1.2%, which places the two processors within measurement noise of each other on every workload. The i3-1315UE does not win a single head-to-head benchmark in the database, but the practical difference is minimal.

For workloads that emphasize sustained multi-threaded throughput, the i7-990X has a slight edge, though its 12 threads versus the i3's 8 do not translate into a large advantage. The data suggests that the i3-1315UE holds its own in efficiency-oriented scenarios, given its 15 W TDP versus the i7's 130 W TDP, but the available benchmarks do not include power or thermal measurements. The i3-1315UE also benefits from a much higher boost clock of 4.50 GHz versus 3.73 GHz, yet the older architecture of the i7-990X compensates through its triple-channel memory bus and larger 12 MB L3 cache.

In terms of overall average benchmark scores, the i3-1315UE records an average of 1739 points across its tested workloads, while the i7-990X averages 1713 points. This discrepancy arises because the i7-990X includes Geekbench results (2612 multi-core, 556 single-core) that the i3-1315UE does not have, pulling its average down. The percentile rankings place the i3-1315UE at the 41st percentile of all CPUs and the i7-990X at the 40th, reinforcing that these are effectively equivalent performers in the database's aggregate metrics.

Architecture Differences

The architectural gap between these two processors is substantial. The i3-1315UE is built on Intel's Raptor Lake architecture, specifically the Raptor Lake-U codename, fabricated on a 10 nm process. It features 6 cores and 8 threads, with a base clock of 1200 MHz and a boost clock of 4500 MHz. Its cache hierarchy includes 80 KB of L1 per core, 1.25 MB of L2 per core, and 10 MB of shared L3 cache. The chip supports DDR4 and DDR5 memory in a dual-channel configuration and provides PCIe Gen 4 with 8 CPU lanes. It includes integrated UHD Graphics 64EU and targets the mobile segment.

The i7-990X, in contrast, uses the Westmere architecture under the Gulftown codename, built on a 32 nm process. It also has 6 cores but 12 threads, with a base clock of 3470 MHz and a boost clock of 3730 MHz. Its cache is configured as 64 KB L1 per core, 256 KB L2 per core, and 12 MB of shared L3. Memory support is limited to DDR3, but the memory bus is triple-channel, which provides additional bandwidth for multi-threaded workloads. The i7-990X supports PCIe Gen 2, has no integrated graphics, and is a desktop part with a 130 W TDP. It carries an unlocked multiplier, allowing manual overclocking, and its part number is SLBVZ.

The production statuses differ sharply. The i3-1315UE is listed as Active, while the i7-990X is End-of-life. The i7-990X was released in February 2011 and the i3-1315UE in January 2023, a 12-year gap that is not reflected in the benchmark scores. The i7-990X uses 1,170 million transistors on a 239 mm² die, whereas the i3-1315UE does not have transistor or die size data recorded. Neither processor supports ECC memory, and both are unlocked in different ways: the i7-990X has an unlocked multiplier, while the i3-1315UE does not.

The most consequential architectural difference is the memory subsystem. The i7-990X's triple-channel DDR3 interface, combined with its higher base clock, allows it to match or slightly exceed the i3-1315UE in Cinebench despite the latter's modern process node and much higher boost clock. The i3-1315UE compensates with newer memory standards and PCIe Gen 4, but these advantages do not appear in the CPU-bound Cinebench tests.

The Verdict

The data indicates a near-tie between these two processors, with the i7-990X holding a razor-thin lead across all six shared benchmarks. The i7-990X wins every head-to-head test, but by margins between 0.8% and 1.2%, which is well within typical run-to-run variance for Cinebench. The i3-1315UE's average benchmark score of 1739 is higher than the i7-990X's 1713, though the latter's additional Geekbench tests skew the comparison. The percentile rankings are effectively identical: 41st for the i3-1315UE and 40th for the i7-990X.

For users who prioritize the lowest power consumption and a modern mobile platform, the i3-1315UE is the clear choice. Its 15 W TDP makes it suitable for thin-and-light systems, and its active production status ensures ongoing availability and driver support. The integrated UHD Graphics 64EU provides a complete solution without a discrete GPU, and the DDR4/DDR5 memory support offers flexibility.

For users who need maximum multi-threaded performance in a desktop workstation and can tolerate a 130 W TDP, the i7-990X edges ahead in every recorded Cinebench test. Its 12 threads and triple-channel memory bus give it a slight throughput advantage, and the unlocked multiplier allows manual tuning for additional performance. However, the End-of-life status and DDR3-only memory support are significant drawbacks for new builds.

The database's nearest-rival data places the i3-1315UE within 0.1% of the Intel Core i3-10100, within 0.2% of the AMD Ryzen 3 4300U, within 0.3% of the Intel Core i5-6600, and within 0.4% of the Intel Core i7-980X. The i7-990X sits within 0.1% of the AMD Ryzen 7 PRO 2700U and the Intel Core i7-4910MQ, and within 0.2% of both the Intel Xeon E5-1620 v3 and the Intel Xeon E3-1265L v4. These comparisons confirm that both chips occupy the same performance tier, making the decision primarily about platform and power requirements rather than raw speed.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i3-1315UE has a boost clock of 4.50 GHz, while the Intel Core i7-990X boosts to 3.73 GHz. Despite this difference, the i7-990X still wins all shared Cinebench tests.

Q: Does the Intel Core i7-990X have integrated graphics?

A: No, the i7-990X has no integrated graphics. The i3-1315UE includes UHD Graphics 64EU.

Q: What memory types do these processors support?

A: The i3-1315UE supports DDR4 and DDR5 in a dual-channel configuration. The i7-990X supports DDR3 in a triple-channel configuration.

Q: Are both processors unlocked for overclocking?

A: No, only the i7-990X has an unlocked multiplier. The i3-1315UE is locked.

Q: Which processor has more threads?

A: The i7-990X has 12 threads, while the i3-1315UE has 8 threads, despite both having 6 cores.

Q: What is the production status of each chip?

A: The i3-1315UE is listed as Active, while the i7-990X is End-of-life.

Head-to-Head Benchmarks

The Cinebench R15 multi-core test shows the i7-990X scoring 611 points against the i3-1315UE's 606, a delta of -0.8% from the perspective of the i3. This is the closest multi-core result in the set. The single-core R15 test has the i7-990X at 86 and the i3 at 85, a -1.2% delta, which is the largest gap of any benchmark in this comparison.

Moving to Cinebench R20, the multi-core test shows the i7-990X at 2549 and the i3-1315UE at 2525, a -0.9% delta. The single-core R20 test has scores of 359 and 356 respectively, a -0.8% delta. These results mirror the R15 pattern: the i7-990X wins, but the margin is small enough that thermal conditions and software state could easily reverse the outcome.

In Cinebench R23, the multi-core scores are 6071 for the i7-990X and 6013 for the i3-1315UE, a -1.0% delta. The single-core test shows 857 versus 849, a -0.9% delta. The i3-1315UE closes the gap slightly in single-core workloads relative to its multi-core deficit, likely due to its higher boost frequency, but it never overtakes the older chip.

The i7-990X also has Geekbench results in the database, with a multi-core score of 2612 and a single-core score of 556. The i3-1315UE has no recorded Geekbench results, so a direct comparison on that test is not possible. The lack of Geekbench data for the i3-1315UE means its average benchmark score of 1739 is computed from fewer tests than the i7-990X's average of 1713, which includes eight results.

The consistent 0.8% to 1.2% margin across all Cinebench versions suggests that the architectural differences between the two chips are largely offsetting. The i7-990X's advantage in thread count (12 versus 8) and triple-channel memory bandwidth is balanced by the i3-1315UE's 4.50 GHz boost clock and newer process node. The outcome is a statistical tie, with the i7-990X holding a nominal but consistent lead.