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Written By:
Date Posted: September 20, 2002
Overclocking
So how high did the Corsair memory reach? Did it make good on its promise of 2-3-3 1T at 200MHz? I'll let the results speak for themselves.
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2.57V - Fast Settings |
3.05V - Fast Settings |
2.57V - Turbo Settings |
3.05V - Turbo Settings |
| Generic Nanya PC2700 |
150MHz |
155MHz |
143MHz |
142MHz |
| Corsair PC2700 |
168MHz |
176MHz |
160MHz |
176MHz |
| Corsair XMS3200 |
205MHz |
213+MHz |
186MHz |
~214MHz |
A few quick notes about the memory. The generic RAM would only run at 166MHz if the Command Rate was set to 2. The Corsair PC2700 memory worked at its specified SPD settings at 166MHz (2-3-3). The system was the limiting factor when the FSB was over 187MHz, gladly the FSB+PCI function worked up to ~208MHz for the memory. After 208MHz testing was impossible for the RAM, as the motherboard and CPU became a limiting factor (CPU maxed at <1300MHz).
So what can we see from the overclocking results? What can we see of the XMS memory? It seems that Corsair has a very nice stick of RAM here, as it easily hits 200MHz at standard SPD settings, and even goes higher when the voltage is turned up. At turbo settings this memory reaches a very nice 186MHz at standard settings, at 3v it easily reaches 200MHz and even goes higher reaching into the 210+ range at 2-2-2 1T.
Synthetic Tests
But does the overclocking results yield any improvements in both synthetic and real tests. Lets first look at some synthetic tests, in SiSoft Sandra and Streamd. We will test the memory at its highest overclock at 'fast' and 'turbo' settings. All results are in MB/s
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SiSoft Sandra
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Int. Buffered |
Float Buffered |
Theoretical Bandwidth |
| Generic Nanya PC2700 - Fast 155MHz |
2247 |
2165 |
2480 |
| Generic Nanya PC2700 - Turbo 143MHz |
2100 |
2036 |
2288 |
| Corsair PC2700 - Fast 176MHz |
2318 |
2174 |
2816 |
| Corsair PC2700 - Turbo 176MHz |
2322 |
2186 |
2816 |
| Corsair XMS3200 - Fast 214MHz |
2547 |
2373 |
3420 |
| Corsair XMS3200 - Turbo 214MHz |
2618 |
2466 |
3420 |
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Stream DOS
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Copy 32 |
Copy64 |
Scale |
Add |
Triad |
| Generic Nanya PC2700 - Fast 155MHz |
802.61 |
892.11 |
917.43 |
1237.75 |
1043.02 |
| Generic Nanya PC2700 - Turbo 143MHz |
805.84 |
883.98 |
1131.14 |
1190.77 |
1042.8 |
| Corsair PC2700 - Fast 176MHz |
918.75 |
899.13 |
1149.43 |
1246.43 |
1043.02 |
| Corsair PC2700 - Turbo 176MHz |
954.94 |
985.83 |
1312.01 |
1317.96 |
1153.01 |
| Corsair XMS3200 - Fast 214MHz |
822.83 |
805.84 |
810.33 |
929.69 |
898.04 |
| Corsair XMS3200 - Turbo 214MHz |
1216.27 |
1153.57 |
1456.53 |
1560.47 |
1350.97 |
What do these results show. Theoretically at turbo settings the XMS by 10-27% which is nice to see but it is still a theoretical improvement. At fast settings the Corsair memory seems to slow down in Stream, this is most likely because the command rate sets itself to 2T at this point, at 200MHz (1T) it equals or beats the Corsair PC2700 at Turbo settings by from 0-5%. Otherwise there isn't much difference between the RAM, though at 155 fast settings, the generic RAM seems to cause a 'hiccup' in StreamD's Scale test as in every other test it outperforms the RAM at 143MHz (Turbo).
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Next Page - Real World Tests
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