AM2's performance running
at CAS 3 DDR2-800 vs CAS 5, DDR2-800
Bluetooth 12 June 2006
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Pricing
from
various
vendors
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PCmark05 breakdown
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CAS 3 DDR2-800 |
CAS 5 DDR2-800 |
| HDD - XP
Startup |
10.78 MB/s |
10.58 MB/s |
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| Physics and 3D |
143.92 FPS |
146.38 FPS |
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| Transparent Windows |
1035.58 Windows/s |
1018.43 Windows/s |
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| 3D - Pixel Shader |
180.14 FPS |
180.19 FPS |
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| Web Page Rendering |
2.71 Pages/s |
2.71 Pages/s |
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| File Decryption |
34.63 MB/s |
34.69 MB/s |
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| Graphics Memory - 64
Lines |
1569.49 FPS |
1571.3 FPS |
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| HDD - General Usage |
6.58 MB/s |
6.59 MB/s |
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| Multithreaded Test 1 /
Audio Compression |
1970.45 KB/s |
1968.77 KB/s |
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| Multithreaded Test 1 /
Video Encoding |
306.8 KB/s |
308.6 KB/s |
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| Multithreaded Test 2 /
Text Edit |
119.3 Pages/s |
118.98 Pages/s |
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| Multithreaded Test 2 /
Image Decompression |
23.01 MPixels/s |
22.9 MPixels/s |
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| Multithreaded Test 3 /
File Compression |
4.2 MB/s |
4.18 MB/s |
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| Multithreaded Test 3 /
File Encryption |
20.5 MB/s |
20.83 MB/s |
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| Multithreaded Test 3 /
HDD - Virus Scan |
57.18 MB/s |
63.44 MB/s |
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| Multithreaded Test 3 /
Memory Latency - Random 16 MB |
9.61 MAccesses/s |
10.85 MAccesses/s |
From the chart above, it can be clearly seen
that there seems to be more advantage running in SPD mode than to run it in CAS
3. One thing we do notice is that, when we run it at CAS 3, the multithreaded
tests performs slightly better in Audio compressions, file compression, image
decompression.
The interesting result is probably Memory
latency for Random 16M. It seems that it is faster to run at CAS 5 then in CAS
3.
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