Gainward 7800GT 'Bliss' 512MB GS GLH in action
Theinquirer.net recently posted some information and benchmarks from Gainwards upcoming 'Bliss' series. There are two 'Bliss' models available, 6800GS and 7800GT. Unlike the other 6800GS and 7800GT cards these cards come with 512MB of GDDR3 memory installed on board. Because there are no pcb´s available for such memory configuration, Gainward has made their own pcb for these cards.
Both of the models are available in two flavors.
The cheapest models are named as "6800GS 'Bliss' 512MB" and 7800GT 'Bliss' 512MB. The high-end models are named as "6800GS 'Bliss' 512MB Golden Sample, Goes-Like-Hell" and "7800GT 'Bliss' 512MB Golden Sample Goes-Like-Hell".
Compared to the cheaper models the Golden Sample, Goes-Like-Hell versions have following differences:
- Copper heatsink on GPU (instead of aluminium)
- Samsung memory (instead of Infineon)
- Rubycon capacitors (instead of United Chemi-Con aka KZG)
- Higher clock frequencies, 7800GT: 450MHz (GPU, instead of 400MHz), 1300MHz (Memory, instead of 1000MHz).
- Higher clock frequencies, 6800GS: 485MHz (GPU, instead of 425MHz), 1300MHz (Memory, instead of 1000MHz).
Few days ago I received few 7800GT 'Bliss' 512MB Golden Sample, Goes-Like-Hell retail cards.
As usual I had to rip the cards apart and see how will they run.
The card look quite different than any other 7800 series card.
After stripping the card, the differences could be seen more easily.
The most visible difference is the power regulation.
The power regulation look like it have been loaned from a motherboard..
Which is a very good thing
A closer look to the memory chips show that they are manufactured by Samsung and rated to 1.4ns(!) / 1430MHz
Time to put the heatsinks back on and start the testing.
I wanted to start testing with stock cooling and without any mods.
Even without any modifications, this test session wasn´t the easiest.
After installing the drivers I saw some artifacts in the windows loading bar.
When I got to the desktop I saw a pop-up notification which said that there isn´t enough power available for the cards to maintain functionality.
First I thought that it was somekind of bug, but when I lowered the vcore voltage of the cpu, I didn´t see any artifacts or pop-up notifications after bootup. Then I raised the vcore back up, and there was the artifacts and the notification again. I realised that my OCZ Powerstream 600W simply couldn´t supply enough power for two 7800GT cards and dual core cpu, since the psu has two 12V rails (18A + 20A).
After changing in my Tagan 580W 2Force (U22) psu, the problems went away. Tagan can supply 35A to 12V rail in combined mode. That is well enough for pretty much anything
After solving the psu problem, I was able to run 3DMark05 thru at 520MHz (GPU) and 1460MHz (Memory) with VERY minor artifacts. This is a fairly good result with stock cooling (which may have been enhanced little bit with cold Finnish winter breeze)
http://service.futuremark.com/compare?3dm05=1835371
The best thing with these card is the price.
The end user prices for these cards here in Finland are 365€ (430$) for the 7800GT 'Bliss' 512MB and 393€ (463$) for the Golden Sample, Goes-Like-Hell model.
btw. The cheaper model also has 1.4ns memory chips (made by Infineon)
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These could take my GT records down easy...
Originally Posted by Cpt Twitchy
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