Finally got some RAM, TCCD no less...

Aftr my basic twinmos dual channel 512mb kit failed on me i have been desperately trying to get hold of some decent replacement ram. I had been patiently waiting for this ram to come into stock as its the cheapest TCCD i could find. But i got bored so i bought some corsair TCCD ram from overclockers for about £150 inc. postage. Its a lot for ram, but just at the highest end of my budget. This is the spec:

Corsair TWINX1024-4400C25PT
2x512mb
ddr 550 @ 2.5 4 4 8
ddr 400 @ 2.0 2 2 5

Now my 3.0 prescott can clock pretty high (3.75ghz+) but the stock cooling cant cope. So until i get better cooling i have back it down to a conservative 3.51ghz with a fsb of 234mhz.

First i put this ram in running at stock timings at 234. Then i tightened the timings to the tightest i could stably; 2 3 3 5. I got the following super pi results:

Ram:-------Ram speed:-------Latencies:-------Super pi time:
Twinmos----195--------------2.5 4 4 8---------41
Corsair------234--------------2.5 4 4 8---------38
Corsair------234--------------2.0 3 3 5---------37

My results as they are arent very impressive as half this pc is still junk, but its the difference that important. This is an almost 10% increase in performance. I cant be bothered to test it properly with other programs, all i know is that its faster. The extra 512mb makes a huge difference to everyday running. I hope the performance increase of this ram will be even more noticeable when i get round to putting the fsb back up. Ill keep you posted.

If you're willing, the true test would be how much impact latencies have i.e. clock the Corsair down to the old TwinMOS speeds, take out one stick and see how it compares to the old stick.

I might give that a go. Just tested at 3.6ghz:

Corsair------240--------------2.5 3 3 6---------36s

Any higher and the processor gets too hot. Im not even comfortable at this speed as i thnk it needs a slight voltage increase to be stable which i just cant give it at the moment.

Just done the latency test you suggested:
Corsair------195--------------2.0 2 2 5---------37s

So as far as super pi is concerned, latency makes a lot of difference even on an intel system. What to try next....

Im actually quite surprised that '195mhz, 2 2 2 6' and '234mhz, 2.5 3 3 5' got exactly the same score, maybe 1:1 is overrated. Obviously this is just one test, the thing i do most is video encoding so ill have to find (any suggestions) or make a test to see what difference the ram makes in that.

What is tccd? I have looked, but with no results
http://search.internet.com/www.webop....webopedia.com

TCCD is the chips used on memory sticks (like Winbond). It's faster than most sticks, so it any memory using TCCD comes at a premium.

Where does it say, could not see it in the specs imn the link at the top.
Thanks

Why this pair of ram if you are not going 275+ FSB?

Well, i know this chip can do at the very least 250mhz on stock air cooling. I will eventually move to watercooling so i wanted ram i could run at 1:1 at good timings at an unknown fsb above 250mhz. I could have maybe saved £20 and gone for pc4000 ram but then that could in future limit my processor.

You have to remember that high performance ram such as this runs at very tight timings low speed or reasonable timings very high speed. It gives me ultimate flexibility and performance whatever speed i run it at on intel or even amd systems. Also i should be able to sell this ram on for a good price in the future if i choose to.

Quote:

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Originally Posted by nvening

Where does it say, could not see it in the specs imn the link at the top.
Thanks

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The PQI ram wont say anywhere that its tccd, you have to read up enthusiast reviews who have identified it by looking at the chips and by their characteristics.

The same goes for the corsair ram i decided to go for in the end.

untill DDR3 comes, also intel uses DDR2 (unless the special mobo)

Im still using socket 478, i wanted to stick with agp and ddr.

this site has alot of RAM and it tells you if it is TCCD or not


http://www.pc-memory-upgrade.co.uk