Intel Core i7-975

The Intel Core i7-975 is a desktop processor in Intel’s Nehalem architecture, listed under the Core i7 Extreme (Bloomfield) generation. It has 4 cores and 8 threads, with a base clock of 3.33 GHz and a boost clock of 3.60 GHz. The launch MSRP was $1059. Its average benchmark score is 1030, placing it at the 27th percentile of all CPUs tracked. Cinebench results include R15 multicore 301, R20 multicore 1256, R20 singlecore 177, R23 multicore 2992, and R23 singlecore 422.

Benchmark Performance

At the aggregate level, the i7-975 is exactly tied with two of its nearest rivals. The Intel Core i7-5650U averages 1030, and the Intel Core i7-2920XM averages 1030, both with a deltaPct of 0. The AMD A12-9800E averages 1033, and the deltaPct of -0.2 indicates the i7-975 trails that part by 0.2%. The AMD Ryzen Embedded V1202B averages 1027, and the deltaPct of 0.3 indicates the i7-975 leads by 0.3%. These are very narrow margins, so the overall benchmark position is essentially a tie within this cluster.

The 27th percentile placement is more informative than any single rival matchup. It says that most CPUs in the database score above 1030, not that the i7-975 is dramatically behind a specific competitor. In Cinebench R20, the multicore score is 1256 and the singlecore score is 177; in Cinebench R23, the multicore score is 2992 and the singlecore score is 422. The R15 multicore score of 301 is another threaded data point in the same pattern. None of the nearest rivals have per-test scores in the FACT PACK, so the aggregate deltas are the only direct comparison metric.

Who Should Consider It

Workload selection should start with the threaded benchmarks. R20 multicore 1256 and R23 multicore 2992 show that the 4-core/8-thread design is capable of parallel throughput, but the 27th percentile overall means many CPUs will complete the same threaded tasks faster. For multi-threaded creation workloads, the i7-975 is usable but not a high-ranking option in the database. The singlecore scores of R20 177 and R23 422 indicate that lightly threaded tasks will not benefit from the same scaling. Gaming workloads that depend on a single dominant thread would run on this processor, but the benchmark data does not place it among high single-core performers. Office and everyday productivity are a better fit because those tasks do not require the chip to sustain maximum threaded throughput. The triple-channel DDR3 memory bus at 25.6 GB/s is part of that platform context.

The platform has no integrated graphics listed, so any system built around it needs a separate graphics solution. Users who need ECC memory should look elsewhere, because ECC memory support is false. The unlocked multiplier may appeal to enthusiasts who want to adjust clock behavior, but that is separate from the benchmark scores themselves.

Platform and Compatibility

The i7-975 uses Intel Socket 1366, with the Nehalem architecture and Bloomfield codename. It is built on Intel’s 45nm process with 731 million transistors and a 263 mm² die. Cache is organized as 64 KB L1 per core, 256 KB L2 per core, and 8 MB shared L3. Memory support is DDR3 over a triple-channel bus with 25.6 GB/s bandwidth; ECC memory is not supported. PCIe is Gen 2. The processor has no integrated graphics listed. The multiplier is unlocked, and the part number is SLBEQ.

Production status is end-of-life. For upgrade path, that end-of-life status and the Socket 1366 interface constrain the platform; the data does not list any other socket compatibility.

How It Compares

Intel Core i7-5650U. The i7-975 and the i7-5650U both have an average score of 1030. The deltaPct of 0 means the two CPUs are indistinguishable in aggregate benchmark score.

Intel Core i7-2920XM. The i7-2920XM also averages 1030, with a deltaPct of 0. The i7-975 matches this rival exactly in the overall dataset.

AMD A12-9800E. The A12-9800E averages 1033, giving a deltaPct of -0.2. This is the only nearest rival where the i7-975 is behind, and the margin is 0.2%.

AMD Ryzen Embedded V1202B. The V1202B averages 1027, with a deltaPct of 0.3. The i7-975 leads this rival by 0.3%, the largest positive delta among the listed nearest rivals.

Single-Thread vs Multi-Thread Behavior

The behavior of the i7-975 is defined by the gap between its threaded and single-threaded Cinebench numbers. In R20, the multicore score is 1256 while the singlecore score is 177. In R23, the multicore score is 2992 while the singlecore score is 422. The multicore figures are much larger, which is expected for a 4-core/8-thread processor, but the singlecore scores are low enough to hold back workloads that cannot use multiple threads. The R15 multicore score of 301 is another threaded data point in the same pattern.

The composite average benchmark score of 1030 sits at the 27th percentile, yet that aggregate obscures the split: the part is closer to its nearest rivals in average score than a raw single-core comparison might suggest, because the multi-thread results pull the total upward. Users choosing between tasks should assume strongly threaded workloads will look better than single-threaded ones.

FAQ

Q: What socket does the Intel Core i7-975 use?

A: It uses Intel Socket 1366.

Q: Does it support ECC memory?

A: No. The ECC memory support field is false.

Q: Does the processor include integrated graphics?

A: No integrated graphics are listed, so a separate graphics solution is required.

Q: Is the multiplier unlocked?

A: Yes, the multiplierUnlocked field is true.

Q: What are the Cinebench R23 scores?

A: The R23 multicore score is 2992 and the singlecore score is 422.

Q: What memory bus does it use?

A: DDR3 over a triple-channel interface with 25.6 GB/s of bandwidth.

Power and Thermals

The TDP for the i7-975 is 130W. That places it in a substantial thermal envelope for a 4-core/8-thread desktop processor. The 45nm process and 263 mm² die are the physical context for that figure. The data does not list a bundled cooler, so the implied cooling tier is one designed to handle a 130W TDP. A Socket 1366 system would need a cooling solution capable of that thermal load. The unlocked multiplier may tempt overclocking, which would only raise the cooling demand beyond the 130W baseline.