Intel SL7PK

The Pentium 4 SL7PK is a 2.8GHz Prescott chip from 2004 with 1MB L2 cache and Hyper-Threading. PassMark scores of 385 multi and 572 single put it in the 12th percentile, which is about as slow as it gets. At $120 USD, you're paying retro tax for a Socket 478 collector's piece. Only worth it if you're restoring an old system and need this exact chip.

Let's talk numbers. The PassMark scores are 385 multi-thread and 572 single-thread. For context, that puts this chip in the 12th percentile for both single and multi-thread performance in our database. Translation: nearly 9 out of 10 CPUs we track run circles around it. A modern budget chip scores in the thousands. This thing scores in the hundreds. It's not a competition, it's a different sport.

The 1MB L2 cache was actually a decent bump over the earlier Northwood Pentium 4s, which topped out at 512KB. And Hyper-Threading helps a bit with multitasking on Windows XP. But the 533 MHz front side bus chokes memory bandwidth, and the 115W TDP means you're burning a lot of power for very little work. The efficiency percentile is 14th, which is generous. This chip is a space heater that happens to do math.

Stacking this against the top competitors in our database is almost comical. The AMD Ryzen 7 9800X3D is the current gaming king, with multi-thread scores that are literally 50 times higher than this Pentium 4. The Dell Xeon E5-2637 V2 and the PC Server and Parts E5-2697 v2 are old server chips, but even those decade-old Xeons have more cores, more cache, and far better efficiency. The be quiet! Ryzen 3 Dark Rock Pro 5 isn't even a CPU, it's a cooler, which tells you how weird the competitive landscape gets when you're shopping for a Pentium 4 in 2025.

The real comparison isn't against modern chips. It's against other Socket 478 options. A Northwood Pentium 4 at 3.0GHz or 3.2GHz would actually be faster in many tasks despite the smaller cache, because the Northwood architecture was more efficient per clock than Prescott. The Prescott's 1MB cache helps in some workloads, but the deeper pipeline and higher latency hurt in others. If you can find a 3.2GHz Northwood for less money, that's often the better retro choice.

At $120 USD, this is a tough sell on paper. You can get a used office PC with a far newer CPU for less money. But retro hardware pricing doesn't follow normal logic. Socket 478 boards are getting scarce, and working Prescott chips with this specific stepping have a niche following. The CAD 162 listing in Canada tracks roughly with the US price after conversion, so there's no geographic bargain to be had.

The value proposition only makes sense if you have a specific motherboard that needs this exact chip. If you're building a period-correct Windows XP gaming rig, $120 for a working SL7PK is annoying but not insane. If you just need a cheap computer, this is a terrible way to spend your money. A $50 used Dell from a decade later will destroy it in every measurable way.

The Intel Pentium 4 SL7PK is a blast from the past. This is the 2.80E GHz Prescott core chip from 2004, sitting on Socket 478 with a 533 MHz front side bus and 1MB of L2 cache. It's a single core with Hyper-Threading, so Windows sees two logical processors. If you're running a retro Windows XP rig or nursing an old Socket 478 board back to life, this is the kind of chip you'd hunt down. Everyone else should probably keep scrolling.

Who is this actually for? Retro PC builders, tinkerers, and people trying to keep an old family computer alive. The 115W TDP tells you this thing runs hot, which was Prescott's calling card. You'll need a decent cooler and a motherboard that can actually feed it. The 2.8GHz clock speed was respectable in its day, but that day was two decades ago.

What makes it interesting is the nostalgia factor. This chip represents a weird moment in Intel history, the Prescott era where clock speeds kept climbing but performance per watt went off a cliff. It's a collector's piece more than a daily driver. And at $120 USD on Amazon, you're paying for rarity and convenience, not performance.

Skip this if you need a computer for anything made after 2008. The single core, lack of 64-bit support, and 533 MHz front side bus make it useless for modern operating systems, web browsing, or any software from the last decade and a half. If you just want a cheap PC, buy a used office machine with a Core i5 or Ryzen 3. You'll spend less and get exponentially more performance.

Also skip it if you're building a retro rig and don't specifically need a Prescott. A 3.0GHz or 3.2GHz Northwood Pentium 4 will often outperform this chip in real-world tasks despite the smaller cache, and it'll run cooler doing it. The Prescott architecture was a step backward in efficiency, and the only reason to choose it is period-correct authenticity for a specific build or motherboard compatibility.

If you're restoring a Socket 478 system and need a drop-in replacement, the SL7PK does the job. It's a known quantity, it's available, and it'll run Windows XP like it's 2004. The Hyper-Threading helps with light multitasking, and the 1MB cache gives it a small edge over older P4s in cache-sensitive tasks. Just budget for a good cooler, because 115W on Socket 478 is no joke.

For everyone else, this is a curiosity, not a purchase. You're not buying a CPU, you're buying a museum piece that still works. And that's fine. Retro computing is a legitimate hobby. Just don't expect to browse the modern web or run anything made in the last 15 years. This chip's best days are behind it, and they weren't even that great to begin with.