[Rargh]

Hi all

I ve a BIG problem w/ my memory bandwith
I ve a pIII 733; 128 MB of sdram; Geforce 256 32Mb; a 20 gb hard drive and a via 694X mother board (apollo pro 133)
and my bandwith doesn t surpass 250 Mb
per second!!!!!!!!!!!!!!!!!!

Could someone resolve this MAJOR problem???

Thx

 

[Raziel]

Why don't you.............CHANGE YOUR MOBO!
Just joking,I really don't know how to help you,sorry.
Bye.

 

[Rargh]

...

 

[bobotns]

Are you kidding??????!!!!!!!
250 MB/s is excellent!!
I have a comparable system and I get ~ 190 MB/s

 

[Raziel]

Just one question:
How or where can I check my bandwith?
Bye.

 

[bobotns]

You can download SiSoft Sandra from:
http://www.sisoftware.demon.co.uk/sandra/

 

[Raziel]

Ok thanks man!
Bye.

 

[Rargh]

Well
bobotns, U said that it s excellent but,Sandra compares to other system and even a Celeron 466 w/ 128 mb of ram has greater
bandwith than me!!

Check in the database

 

[bobotns]

I don't know why there is such values, but if you see for example the benchmarks of the new C-Athlon with 266 MHz FSB and DDR-RAM, the best motherboard gets ~ 300 MB/s.
May be by the tests of the celeron you mentionned, 2 banks were used (2 x 64MB), but I'm not sure of that theory.

 

[SanDRocK]

i don't think sandra is that acurate, with my spec's it says i only have 129MB/s mem bandwidth

 

[Rargh]

what are ur mobo specifications?
(If u have a i820 chipset, it s quite normal...)

 

[Rargh]

Originally posted by bobotns
I May be by the tests of the celeron you mentionned, 2 banks were used (2 x 64MB), but I'm not sure of that theory.

i want to say that i have 2 64mb memory banks too...
and another thing , i think that having two banks of memory of 64 mb is worse than having a single 128 memory bank, cuz' of the time passed w/ the informations (bytes) to get into the other
bank when the first one is plenty.
BTW D i speak a lot tonight! ), i wanted to say that i ve used sandra 2000..i m d/l the 2001 right now. i m going to tell u if the
results have changed...

bye

 

[MegaWarhead]

That is a problem

That is a problem. You should be recieving a lot higher with that processor. I recieve 519 mb/s with my conifg. Try installing any new chip set drivers by intel. You may also want to go into your bios and make sure that the ram chips are actually set on the speed they are supposed to be. Are your modules PC 133? Seriously consider getting a new mother board, an optimized motherboard means the world. If you want more help goto www.overclockers.com they know all.

(I have a AMD Duron 750, Biostar M7VKB Mother Board, 1 64 mb PC 100 (OC to 133), and 2 32 pc 66 (OC 133). and Windows 2k) I would have 224 but my 128 pc 133 died last weekend. The funny part is that it was quality PC 133 CAS 2 memory and I only had it 5 months. Oh, well it's under warranty.

 

[bobotns]

There ISN'T motherboards that get more than 300 MB/s (C-Athlon). The only systems that get more than 300 are pentium 4 systems that use RAMBUS memory, they get up to 800 MB/s!!

NB: in my system, when I overclock the FSB to 150 MHz and the memory settings to Turbo, I get almost 200 MB/s.

and... your 519 MB/s are inaccurate and impossible!

 

[Phuzzi]

Originally posted by bobotns
There ISN'T motherboards that get more than 300 MB/s (C-Athlon). The only systems that get more than 300 are pentium 4 systems that use RAMBUS memory, they get up to 800 MB/s!!

NB: in my system, when I overclock the FSB to 150 MHz and the memory settings to Turbo, I get almost 200 MB/s.

and... your 519 MB/s are inaccurate and impossible!

No, you're quite incorrect. With the latest athlon motherboards supporting memory interleaving and a wide access to modifying other memory timings, it's easy to get well over 400Mb/s. I quickly loaded up sandra and benched my RAM to show you.

http://www.harris47.fsnet.co.uk/phuz_pc_membench_14-05-01.jpg

And that's in Win2k, after being up for a few days, so it could be even better (Benched in Sandra 2001 Pro). My ram is actually running at 133Mhz CL3, so it's performing quite well against CL2 systems. I have aggresive memory times set in the bios (4way interleave, 4k DRAM page, Enhance chip performance, etc).

As you can see, above 500Mb/s is not impossible at all. In fact, your system seems to be underperforming.. maybe time for an AMD solution?

Sys Specs:
AMD Tbird [email protected]
Abit KT7A, 266Fsb
256Mb PC133 CL3

 

[MegaWarhead]

Wrong. Yes a P3 board can get that high, just not that board. Rambus should get betwenn 600-1000 or above with the restrictions Rambus set on intel. Rambus theoretically could get much higher. Once again they are not allowed to because why rambus is not stable yet at those speeds. DDR ram gets about 700-800. Nividia has new DDR Ram coming out with a 2.7 gb /s transfer rate. The test modules for an VIA KT133A CAS 2 SDRAM Board is 565 MB/S according to SISSoft Sandra which provides the most accurate memory and cpu test results in the industry. Mine are 521 MB/s according to SISSoft Sandra. An Intel 440 BX should be able to get 333 mb/s according to SISSoft Sandra. You might want to consider getting an Intel 815 board which gives a score of 468 MB/s. Amd boards run at a much higher bus and run the ram at a much higher speed and are much more optimized than intels that is why they score much higher. All in all you are in error, get a new mother board or even better a new processor as well.

 

[Phuzzi]

It's all very well to put high speed DDR RAM clocked to 300Mhz+ on video boards, implementing it on motherboards is substantially more difficult, assuming you want solid stable motherboards.

PC2100 hasn't even been adopted yet.. i wouldn't expect to see motherboards supporting even faster clocked RAM that quickly (in mainstream that is, i'm well aware faster DDR RAM is currently being sampled).

As for Rambus imposing speed restrictions.. interesting. Sounds like BS to me, i'd love you to supply some info to substantiate that.

 

[bobotns]

No, I repeat it, it's impossible to get 500 MB/s. It seems that Sandra multiplies the memory bandwith by 2! you must consider official benchmarks. In the latest edition of CHIP (the best computer magazine in Germany!!), the redaction made some benchmarks with new C-Athlon boards. You can see the results of the bandwith in the attached image!

 

[Phuzzi]

If you pay attention to official benchmarks, from whatever company, you are a fool. SiSoft Sandra is a well respected benchmark tool. Other benchmarking programs illustrate the same results. I wouldn't touch paper based magazines for hardware information either.