Reply 620 of 633, by Skyscraper
This turned out to be a bit boring! 😁
No need for Geforce 7900 GTX SLI or changing CPU to the X2 6400+
I still have the A64 X2 6000+ Asus M2N-SLI AM2 system I used for benchmarking for the list many years ago (with the slower v1.3 Doom 3 version) intact as I have used it for some other projects. I only reinstalled Doom 3, v1.0 this time, added an X-Fi XtremeMusic sound card and changed out the memory kit for a better one. This system runs Windows XP Pro SP3 with most of the bloat still active as it's a system I used for some Internet gaming such as WoW "vanilla" a few years ago.
Athlon 64 X2 6000+ (3.0), Asus M2N-SLI Deluxe nForce 570, 2Gb DDR2 750 3-3-3-8, Geforce 7900GTX, 92.91, X-fi XtremeMusic, XP SP3
Doom 3 v1.0 1024 Ultra: 190.1 FPS
Athlon 64 X2 6000+ @3.5 14x250, Asus M2N-SLI Deluxe nForce570, 2x1GB DDR2 1000 4-4-4-12, 7900GTX 720/1800, 92.91, X-Fi, XP SP3
Doom 3 v1.0 1024 Ultra: 221.4 FPS
The voltage in CPU-Z is shown as 0.2V lower than it really is, both @stock and overclocked.
DDR2 750 MHz is what you actually get when you choose DDR2 800 MHz using the 15x multiplier with Athlon 64 AM2 CPUs running at stock 200 MHz reference clock. This is because the wanted memory multiplier is 2x as in (2x200)x2 (for DDR) = 800 but as the memory multiplier is tied to the CPU multiplier the nearest we can get is 15/8 = 1.875x and the memory speed comes from ((15/8)x200)x2 = 750. This can also be presented as CPU/8 (x2 for DDR) or (3000/8)x2 = 750.
At even multipliers the 800 MHz memory setting works as intended as all even numbers can be divided by 2 without the result beeing a fraction. For example 16/2 = 8 and to get 800 Mhz memory speed ((16/8)x200)x2 = 800 or (3200/8)x2 = 800.
If you think of the memory clock as the CPU speed divided by the most suitable integer or the reference clock multiplied by the CPU multiplier divided by the most suitable integer dosn't really matter as it's exactly the same thing.
Main PC: Dual Xeon X5690@4.6ghz, Evga - SR-2, 48gb memory, Intel X25-M g2 SSD and a Nvidia GTX 980 ti.
Retro PC #3: K6-2 450@500mhz, PC-Chips m577, 256mb sdram, AWE64 and a Voodoo Banshee.