服务器横评：国货VS洋货 为何完胜？！(1)(12)
SiSoftware Sandra缓存内存测试主要包括内存带宽、内存延迟等性能的测试。
| SiSoftware Sandra Pro Business 2010 | |||
| 测试对象 | Dawning I620r-G Westmere-EP服务器 双路Intel Gulftown Xeon X5650 2.67GHz |
DELL PE2900 III 双路Intel Harptown Xeon E5430 2.66GHz |
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Memory Bandwidth Benchmark 内存带宽测试 |
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| Int Buff'd iSSE2 Memory Bandwidth | 35.6GB/s | 6.13GB/s | |
| Int Buff'd iSSE2 Memory Bandwidth vs SPEED | 27.41MB/s/MHz | 9.43MB/s/MHz | |
| Float Buff'd iSSE2 Memory Bandwidth | 35.55GB/s | 6.13GB/s | |
| Float Buff'd iSSE2 Memory Bandwidth vs SPEED | 27.37MB/s/MHz | 9.43MB/s/MHz | |
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Memory Latency Benchmark 内存延迟测试 |
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Memory(Random Access) Latency (越小越好) |
86ns | 108ns | |
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Memory(Random Access) Latency vs SPEED (越小越好) |
0.06ns/MHz | 0.16ns/MHz | |
| Speed Factor(越小越好) | 60.20 | 95.20 | |
| Internal Data Cache | 4clocks | 3clocks | |
| L2 On-board Cache | 9clocks | 18clocks | |
| L3 On-board Cache | 51clocks | ||
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Cache and Memory Benchmark 缓存及内存测试 |
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| Cache/Memory Bandwidth | 167GB/s | 68.88GB/s | |
| Cache/Memory Bandwidth vs SPEED | 61.20MB/s/MHz | 26.52MB/s/MHz | |
| Speed Factor(越小越好) | 27.20 | 111.90 | |
| Internal Data Cache | 560.14GB/s | 421.23GB/s | |
| L2 On-board Cache | 462.3GB/s | 122.68GB/s | |
从结果来看，两款平台最大的差距在于内存带宽测试，这是因为从Nehalem-EP处理器开始，Intel英特尔就已经在处理器中内置了内存控制器。这样一来，无论是提供的贷款还是读取速度，从处理器内部运算都要比通过北桥传输的至强5400平台快很多。在内存延迟上，两款平台并没有表现出太明显的差距，缓存及内存测试中的差距幅度也仅有几倍，说明这两项测试，特别是前一项还是比较看重内存本身的特点。
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