Opteron 6276 vs Xeon E5-2640

Opteron 6276 vs Xeon E5-2640 Performance Spectrum

Opteron 6276

16 / 16

6,348

+0.7%

Ryzen Embedded V1202B

Ryzen Embedded R1606G

Athlon Gold 7220U

Ryzen 3 PRO 2300U

Ryzen Threadripper 2920X

Ryzen 9 5900XT

Ryzen Threadripper 3970X

Ryzen Threadripper PRO 7965WX

Xeon E5-2640

6 / 12

6,305

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.

Opteron 6276 vs Xeon E5-2640 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.

Opteron 6276 vs Xeon E5-2640: Pros, Cons & Final Verdict

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

Opteron 6276

2011

Why buy it

✅Costs $97 less on MSRP ($788 MSRP vs $885 MSRP).
✅Delivers 13.1% more PassMark for each dollar spent, at 8.1 vs 7.1 PassMark/$ ($788 MSRP vs $885 MSRP).

Trade-offs

❌Smaller total L3 cache (8 MB vs 15 MB).
❌21.1% higher power demand at 115W vs 95W.

Xeon E5-2640

2012

Why buy it

✅+87.5% larger total L3 cache (15 MB vs 8 MB).
✅Draws 95W instead of 115W, a 20W reduction.
✅100+% more PCIe lanes (40 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (6,305 vs 6,348).
❌Lower PassMark per dollar, at 7.1 vs 8.1 PassMark/$ ($885 MSRP vs $788 MSRP).

Quick Answers

So, is Opteron 6276 better than Xeon E5-2640?

Yes. Opteron 6276 is the better all-around CPU here. It gives you a 2.0% average FPS lead across 50 shared CPU game tests in our data and 0.7% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Opteron 6276 is the better pick. According to our tests, it delivers 2.0% more average FPS across 50 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Opteron 6276 is the stronger fit. You are getting 0.7% better PassMark, backed by 16 cores and 16 threads.

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

Opteron 6276 is the better buy right now. Opteron 6276 comes in $97 cheaper on MSRP at $788 MSRP versus $885 MSRP, and it still gives you a 2.0% average FPS lead across 50 shared CPU game tests in our data. It is also 13.1% better value on MSRP (8.1 vs 7.1 PassMark/$), 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 E5-2640 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2011) and 87.5% larger total L3 cache (15 MB vs 8 MB). That makes it the safer long-term bet.

Opteron 6276 vs Xeon E5-2640 Technical Specifications

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

Opteron 6276

The Opteron 6276 is manufactured by AMD. It was released in 14 November 2011 (14 years ago). It is based on the Interlagos (2011−2012) architecture. It features 16 cores and 16 threads. Base frequency is 2.3 GHz, with boost up to 3.2 GHz. L3 cache: 8 MB (total). L2 cache: 2 MB (per module). Built on 32 nm process technology. Socket: G34. Thermal design power (TDP): 115 Watt. Memory support: DDR3. Passmark benchmark score: 6,348 points. Launch price was $119.

Xeon E5-2640

The Xeon E5-2640 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 3 GHz. L3 cache: 15360 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 6,305 points. Launch price was $162.

⚡

Processing Power

The Opteron 6276 packs 16 cores / 16 threads, while the Xeon E5-2640 offers 6 cores / 12 threads — the Opteron 6276 has 10 more cores. Boost clocks reach 3.2 GHz on the Opteron 6276 versus 3 GHz on the Xeon E5-2640 — a 6.5% clock advantage for the Opteron 6276 (base: 2.3 GHz vs 2.5 GHz). The Opteron 6276 uses the Interlagos (2011−2012) architecture (32 nm), while the Xeon E5-2640 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Opteron 6276 scores 6,348 against the Xeon E5-2640's 6,305 — a 0.7% lead for the Opteron 6276. L3 cache: 8 MB (total) on the Opteron 6276 vs 15360 kB (total) on the Xeon E5-2640.

Feature	Opteron 6276	Xeon E5-2640
Cores / Threads	16 / 16+167%	6 / 12
Boost Clock	3.2 GHz+7%	3 GHz
Base Clock	2.3 GHz	2.5 GHz+9%
L3 Cache	8 MB (total)	15360 kB (total)+88%
L2 Cache	2 MB (per module)+700%	256 kB (per core)
Process	32 nm	32 nm
Architecture	Interlagos (2011−2012)	Sandy Bridge-EP (2012)
PassMark	6,348	6,305

🧠

Memory & Platform

The Opteron 6276 uses the G34 socket (PCIe 2.0), while the Xeon E5-2640 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Opteron 6276	Xeon E5-2640
Socket	G34	LGA2011
PCIe Generation	PCIe 2.0	PCIe 5.0+150%
Max RAM Speed	—	DDR3-1333
Max RAM Capacity	—	384 GB
RAM Channels	—	4
ECC Support	—	Yes
PCIe Lanes	—	40

🔧

Advanced Features

Virtualization: not specified (Opteron 6276) / VT-x, VT-d (Xeon E5-2640). Primary use case: Xeon E5-2640 targets Server.

Feature	Opteron 6276	Xeon E5-2640
Integrated GPU	—	No
Unlocked	—	No
AVX-512	—	No
Virtualization	—	VT-x, VT-d
Target Use	—	Server

💰

Value Analysis

At launch, the Opteron 6276 was priced at $788, while the Xeon E5-2640 came in at $885. On launch pricing ($788 vs $885), Opteron 6276 was $97 cheaper. In terms of value on MSRP (PassMark points per dollar), the Opteron 6276 delivers 8.1 pts/$ vs 7.1 pts/$ for the Xeon E5-2640 — making the Opteron 6276 the 12.3% better value option.

Feature	Opteron 6276	Xeon E5-2640
MSRP	$788-11%	$885
Performance per Dollar	8.1+14%	7.1
Release Date	2011	2012

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