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Untitled Document
Latency
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400MHz
DDR, C2, Dual Channel, 2 x 512MB |
400MHz
DDR, C2.5, Dual Channel, 2 x 512MB |
400MHz
DDR, C3, Dual Channel, 2 x 512MB |
| Aquamark
Overall |
60,458 |
60,272 |
60,131 |
| Aquamark
CPU |
9,612 |
9,530 |
9,494 |
| 3DMark
03 |
11,101 |
11,107 |
11,115 |
| 3DMark
01 |
20,544 |
20,374 |
20,359 |
| Doom
3 Low |
77.4 |
76.8 |
77.3 |
| Doom
3 High |
69.1 |
69.0 |
69.0 |
| UT2004
Soft |
17.05 |
17.01 |
17.05 |
| UT2004
High |
134.44 |
133.45 |
132.87 |
We were very surprised by these results, with an almost negligible difference
in performance between CAS2 and CAS3. At very most there is 2fps difference
in UT2004 but the rest are almost identical. Strangely, CAS3 seems to be faster
than CAS2.5, we strike this down as an anomaly in testing.
|
400MHz
DDR-II, C3, Dual Channel, 2 x 512MB |
400MHz
DDR-II, C4, Dual Channel, 2 x 512MB |
400MHz
DDR-II, C5, Dual Channel, 2 x 512MB |
| Aquamark
Overall |
60,001 |
59,796 |
59,508 |
| Aquamark
CPU |
9,454 |
9,342 |
9,209 |
| 3DMark
03 |
11,094 |
11,106 |
11,080 |
| 3DMark
01 |
20,329 |
20,130 |
20,081 |
| Doom
3 Low |
76.2 |
76.3 |
74.6 |
| Doom
3 High |
68.7 |
68.5 |
68.3 |
| UT2004
Soft |
16.97 |
16.92 |
16.85 |
| UT2004
High |
133.23 |
131.9 |
130.31 |
Carrying on with the latency testing, we decided to test with DDR-II which
goes all the way up to CAS5. Our memory was rated at C4, so we were impressed
to find C3 quite stable. The difference between C3,4 and 5 is minimal, following
the same pattern as DDR. Less than 2fps sway in both Doom 3 and UT2004 is exhibited.
In the grand scheme of things, this is nothing. If we take the two extremes
of CAS5 and CAS2, there is at most 4fps difference, which is roughly 3%.
From previous testing we know that the rest of the latencies make very little
difference. So, considering CAS Latency should make the biggest difference out
of all the latencies, and we are seeing next to no difference at all, we can
pretty much conclude that for gaming at least, latency doesn't matter.
Frequency
|
400MHz
DDR-II, C4, Dual Channel, 2 x 512MB |
533MHz
DDR-II, C4, Dual Channel, 2 x 512MB |
600MHz
DDR-II, C4, Dual Channel, 2 x 512MB |
| Aquamark
Overall |
59,796 |
61,191 |
61,564 |
| Aquamark
CPU |
9,342 |
9,999 |
10,195 |
| 3DMark
03 |
11,106 |
11,194 |
11,194 |
| 3DMark
01 |
20,130 |
21,013 |
21,043 |
| Doom
3 Low |
76.3 |
79.6 |
80.6 |
| Doom
3 High |
68.5 |
69.8 |
70.2 |
| UT2004
Soft |
16.92 |
17.24 |
17.31 |
| UT2004
High |
131.9 |
137.13 |
139.23 |
Specific to the Asus motherboard, comes asynchronous support for a 600MHz memory
speed. Here we can see between 4-5% increase in performance going from 400MHz
to 600MHz on the DDR-II platform. For an extra 200MHz clock speed, this isn’t
a huge amount.
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