Phenom II X6 1100T BE vs Xeon D-1521

Phenom II X6 1100T BE vs Xeon D-1521 Performance Spectrum

Phenom II X6 1100T BE

6 / 6

5,745

+0.7%

Ryzen Threadripper PRO 3975WX

Ryzen Threadripper PRO 7965WX

Xeon D-1521

4 / 8

5,703

0.0%

About PassMark

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.

Phenom II X6 1100T BE vs Xeon D-1521 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.

Phenom II X6 1100T BE vs Xeon D-1521: Pros, Cons & Final Verdict

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

Phenom II X6 1100T BE

2010

Why buy it

✅+0.7% higher PassMark.
✅+300% larger total L3 cache (6 MB vs 1.5 MB).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Xeon D-1521.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon D-1521 across 50 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon D-1521, which brings 4 cores / 8 threads.
❌Lower PassMark per dollar, at 21.7 vs 28.7 PassMark/$ ($265 MSRP vs $199 MSRP).
❌177.8% higher power demand at 125W vs 45W.

Xeon D-1521

2015

Why buy it

✅Better for gaming: +19.1% higher average FPS across 50 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.
✅Costs $66 less on MSRP ($199 MSRP vs $265 MSRP).
✅Delivers 32.2% more PassMark for each dollar spent, at 28.7 vs 21.7 PassMark/$ ($199 MSRP vs $265 MSRP).
✅Draws 45W instead of 125W, a 80W reduction.

Trade-offs

❌Lower PassMark (5,703 vs 5,745).
❌Smaller total L3 cache (1.5 MB vs 6 MB).
❌No boxed cooler included, unlike Phenom II X6 1100T BE.

Quick Answers

So, is Xeon D-1521 better than Phenom II X6 1100T BE?

Not really, because they are built for different jobs. Xeon D-1521 makes more sense for workstation-style multi-core throughput, while Phenom II X6 1100T BE is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Phenom II X6 1100T BE is the stronger fit. You are getting 0.7% better PassMark, backed by 6 cores and 6 threads. It also has the larger cache pool with 300% larger total L3 cache (6 MB vs 1.5 MB).

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

Xeon D-1521 is the better buy right now. Xeon D-1521 comes in $66 cheaper on MSRP at $199 MSRP versus $265 MSRP, and it still gives you a 19.1% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Phenom II X6 1100T BE is still stronger for heavier multi-core work with 0.7% better PassMark. It is also 32.2% better value on MSRP (28.7 vs 21.7 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon D-1521 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2010). That makes it the safer long-term bet.

Phenom II X6 1100T BE vs Xeon D-1521 Technical Specifications

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

Phenom II X6 1100T BE

The Phenom II X6 1100T BE is manufactured by AMD. It was released in 2009-01-01. It is based on the Thuban (2010) architecture. It features 6 cores and 6 threads. Base frequency is 3.3 GHz, with boost up to 3.7 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 125 Watt. Memory support: DDR3. Passmark benchmark score: 5,745 points. Launch price was $149.

Xeon D-1521

The Xeon D-1521 is manufactured by Intel. It was released in 1 November 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 4 cores and 8 threads. Base frequency is 2.4 GHz, with boost up to 2.7 GHz. L3 cache: 1.5 MB (per core). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1667. Thermal design power (TDP): 45 Watt. Memory support: DDR4, DDR3. Passmark benchmark score: 5,703 points. Launch price was $199.

⚡

Processing Power

The Phenom II X6 1100T BE packs 6 cores / 6 threads, while the Xeon D-1521 offers 4 cores / 8 threads — the Phenom II X6 1100T BE has 2 more cores. Boost clocks reach 3.7 GHz on the Phenom II X6 1100T BE versus 2.7 GHz on the Xeon D-1521 — a 31.3% clock advantage for the Phenom II X6 1100T BE (base: 3.3 GHz vs 2.4 GHz). The Phenom II X6 1100T BE uses the Thuban (2010) architecture (45 nm), while the Xeon D-1521 uses Broadwell (2015−2019) (14 nm). In PassMark, the Phenom II X6 1100T BE scores 5,745 against the Xeon D-1521's 5,703 — a 0.7% lead for the Phenom II X6 1100T BE. L3 cache: 6 MB (total) on the Phenom II X6 1100T BE vs 1.5 MB (per core) on the Xeon D-1521.

Feature	Phenom II X6 1100T BE	Xeon D-1521
Cores / Threads	6 / 6+50%	4 / 8
Boost Clock	3.7 GHz+37%	2.7 GHz
Base Clock	3.3 GHz+38%	2.4 GHz
L3 Cache	6 MB (total)+300%	1.5 MB (per core)
L2 Cache	512 kB (per core)+100%	256K (per core)
Process	45 nm	14 nm-69%
Architecture	Thuban (2010)	Broadwell (2015−2019)
PassMark	5,745	5,703
Geekbench 6 Single	508	—

🧠

Memory & Platform

The Phenom II X6 1100T BE uses the AM3 socket (PCIe 2.0), while the Xeon D-1521 uses FCBGA1667 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Phenom II X6 1100T BE	Xeon D-1521
Socket	AM3	FCBGA1667
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	DDR3-1333 / DDR2-1066	—
Max RAM Capacity	32 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	16	—

🔧

Advanced Features

Virtualization: AMD-V (Phenom II X6 1100T BE) / not specified (Xeon D-1521). Primary use case: Phenom II X6 1100T BE targets Enthusiast Legacy.

Feature	Phenom II X6 1100T BE	Xeon D-1521
Integrated GPU	No	—
Unlocked	Yes	—
AVX-512	No	—
Virtualization	AMD-V	—
Target Use	Enthusiast Legacy	—

💰

Value Analysis

At launch, the Phenom II X6 1100T BE was priced at $265, while the Xeon D-1521 came in at $199. On launch pricing ($265 vs $199), Xeon D-1521 was $66 cheaper. In terms of value on MSRP (PassMark points per dollar), the Phenom II X6 1100T BE delivers 21.7 pts/$ vs 28.7 pts/$ for the Xeon D-1521 — making the Xeon D-1521 the 27.7% better value option.

Feature	Phenom II X6 1100T BE	Xeon D-1521
MSRP	$265	$199-25%
Performance per Dollar	21.7	28.7+32%
Release Date	2010	2015

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