Atom x5-Z8500 vs Pentium G645T

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Atom x5-Z8500 vs Pentium G645T FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Atom x5-Z8500 vs Pentium G645T: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Atom x5-Z8500

2015

Why buy it

✅+0.3% higher PassMark.
✅Integrated graphics onboard with Intel HD Graphics (Cherry Trail), while Pentium G645T needs a discrete GPU.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Pentium G645T

2012

Why buy it

Trade-offs

❌Lower PassMark (1,238 vs 1,242).
❌Launch MSRP is still $64 MSRP, while Atom x5-Z8500 mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while Atom x5-Z8500 can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Pentium G645T better than Atom x5-Z8500?

It depends on what you want from the system. For gaming, Pentium G645T is ahead with a 1.5% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Atom x5-Z8500 pulls ahead with 0.3% better PassMark.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Atom x5-Z8500 is the stronger fit. You are getting 0.3% better PassMark, backed by 4 cores and 4 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Pentium G645T is the better buy right now. Pentium G645T comes in at an unclear MSRP at $64 MSRP versus unclear MSRP, and it still gives you a 1.5% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Atom x5-Z8500 is still stronger for heavier multi-core work with 0.3% better PassMark. It is also 100.0% better value on MSRP (19.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

Which one is more future-proof for 2026 and beyond?

Atom x5-Z8500 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2012) and more multi-core headroom with 4 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom x5-Z8500 vs Pentium G645T Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Atom x5-Z8500

The Atom x5-Z8500 is manufactured by Intel. It was released in 2 March 2015 (10 years ago). It is based on the Cherry Trail (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 1.44 GHz, with boost up to 2.24 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 14 nm process technology. Socket: UTFCBGA1380. Memory support: DDR3. Passmark benchmark score: 1,242 points. Launch price was $69.

Pentium G645T

The Pentium G645T is manufactured by Intel. It was released in 2007-01-01. It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 2.5 GHz, with boost up to 2.5 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 1,238 points. Launch price was $69.

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Processing Power

The Atom x5-Z8500 packs 4 cores / 4 threads, while the Pentium G645T offers 2 cores / 2 threads — the Atom x5-Z8500 has 2 more cores. Boost clocks reach 2.24 GHz on the Atom x5-Z8500 versus 2.5 GHz on the Pentium G645T — a 11% clock advantage for the Pentium G645T (base: 1.44 GHz vs 2.5 GHz). The Atom x5-Z8500 uses the Cherry Trail (2015−2016) architecture (14 nm), while the Pentium G645T uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Atom x5-Z8500 scores 1,242 against the Pentium G645T's 1,238 — a 0.3% lead for the Atom x5-Z8500. L3 cache: 0 kB on the Atom x5-Z8500 vs 3 MB (total) on the Pentium G645T.

Feature	Atom x5-Z8500	Pentium G645T
Cores / Threads	4 / 4+100%	2 / 2
Boost Clock	2.24 GHz	2.5 GHz+12%
Base Clock	1.44 GHz	2.5 GHz+74%
L3 Cache	0 kB	3 MB (total)
L2 Cache	2 MB+700%	256 kB (per core)
Process	14 nm-56%	32 nm
Architecture	Cherry Trail (2015−2016)	Sandy Bridge (2011−2013)
PassMark	1,242	1,238

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Memory & Platform

The Atom x5-Z8500 uses the UTFCBGA1380 socket (PCIe 3.0), while the Pentium G645T uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Atom x5-Z8500	Pentium G645T
Socket	UTFCBGA1380	LGA1155
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	LPDDR3-1600	—
Max RAM Capacity	8 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	2	—