All tests ran with Quake 3 1024x768 High Quality
RAM: Corsair Value Select 256MBx2 Dual Kit (512MB)
Constants:
"Performance mode": Standard
Burst Length: 4
Memory clock rate: 200 MHz
Dual Channel Mode
Memory Acceleration (ASUS Hyperpath/Intel PAT): Enabled
You may think all the FPS differences are within the margin of error, so to make sure they weren't I did the following.
I ran one test 3 times and came out with the exact same score each time, to the tenth decimal (output accuracy), so essentially the EXACT same thing.
Disclaimer: I only tested this on one application, so your mileage may vary depending on which application or game you run!
Timing Format: CAS-RAS2CAS-RAS PRECHARGE-TRAS
Data
Timings = FPS
2.0-4-4-8 = 240.1
2.5-3-3-8* = 246.6
2.5-3-4-7 = 244.8
2.5-4-4-7 = 241.7
2.5-4-4-8 = 238.9
2.5-4-3-7 = 242.2
2.5-3-4-8 = 243.7
2.5-4-3-8 = 242.0
* Default SPD Value
Performance increase per -0.5 CAS : 0.50%
Performance increase per -1 RAS2CAS : 1.90%
Performance increase per -1 RAS PRECHARGE : 1.19%
Performance increase per -1 TRAS : 0.45%
Thus, we can conclude that the order of importance of the timings is as follows:
1. RAS2CAS
2. RAS PRECHARGE
3. CAS
4. TRAS
We can also conclude timings make little difference to performance, of games at least. A higher clock rate is much more valuable if all you have to do is increase one of the timings.
RAM: Corsair Value Select 256MBx2 Dual Kit (512MB)
Constants:
"Performance mode": Standard
Burst Length: 4
Memory clock rate: 200 MHz
Dual Channel Mode
Memory Acceleration (ASUS Hyperpath/Intel PAT): Enabled
You may think all the FPS differences are within the margin of error, so to make sure they weren't I did the following.
I ran one test 3 times and came out with the exact same score each time, to the tenth decimal (output accuracy), so essentially the EXACT same thing.
Disclaimer: I only tested this on one application, so your mileage may vary depending on which application or game you run!
Timing Format: CAS-RAS2CAS-RAS PRECHARGE-TRAS
Data
Timings = FPS
2.0-4-4-8 = 240.1
2.5-3-3-8* = 246.6
2.5-3-4-7 = 244.8
2.5-4-4-7 = 241.7
2.5-4-4-8 = 238.9
2.5-4-3-7 = 242.2
2.5-3-4-8 = 243.7
2.5-4-3-8 = 242.0
* Default SPD Value
Performance increase per -0.5 CAS : 0.50%
Performance increase per -1 RAS2CAS : 1.90%
Performance increase per -1 RAS PRECHARGE : 1.19%
Performance increase per -1 TRAS : 0.45%
Thus, we can conclude that the order of importance of the timings is as follows:
1. RAS2CAS
2. RAS PRECHARGE
3. CAS
4. TRAS
We can also conclude timings make little difference to performance, of games at least. A higher clock rate is much more valuable if all you have to do is increase one of the timings.
