The nVidia 7800 Series Performance Survey

What brand did you choose?

  • eVGA

    Votes: 138 31.4%

  • BFG

    Votes: 154 35.1%

  • XFX

    Votes: 84 19.1%

  • ASUS

    Votes: 8 1.8%

  • Leadtek

    Votes: 23 5.2%

  • Gainward

    Votes: 5 1.1%

  • MSI

    Votes: 13 3.0%

  • other

    Votes: 14 3.2%
  • Total voters
    439
All I know is that John said he's been working with the geometric clocks to improve performance. I've been too excited working with the new stuff to ask him what he did specifically. I'm not sure if he'd say though.

Your 9600 is mighty impressive on stock cooling, but keep in mind that my computer is running 2gigs of loose timing ram. I'm losing a lot of points there too. Wish I had kept my old G.Skill sticks until I had gotten the GTX back.

In case it matters, VJ said that my GTX core is actually below average from the 20 or so that he's seen. He's currently got an aircooled GTX pulling 10,300 marks @ daily use clock speeds :eek:
 
Your score is awesome. 10K plus on a single card is a great result. I just knew somehow you were being held back with the no delta BIOS. Nice card!

I have done some work with the BIOS items myself (delta, memory timings, etc). That is why I was able to get 9600 ;)

I think I will have to hit up John to mod a couple of GTX's. I wonder what two in SLI would do ;)
 
Make: XFX
Model: 7800 GTX
Driver: 81.84
Stock clocks: core / mem 450/1250
Coolbits Detect: OC core / OC mem 460/1350
Usable OC: OC core / OC mem 485/1400
Idle temp: 42C Ambient temp unknown
Cooling method: stock
 
Dell
7800GTX With Quadro HS
77.77
stock 430/1200
coolits
522/1440
idle ~ 50
load ~ low 60s
cooling : stock
ambient = COLD! =p
 
Have you ever wondered what effect memory speed had on 3DMark05? Well, here are some results with my 7800 GTX.

The test parameters:
AMD 64 3200+ @ 2.5 Ghx
BFG 7800 GTX OC @ 500 Mhz
81.82 driver
All default drivers settings, no tweaks


Memory Clock________3DMark05_____

1200_________________8441_______
1250_________________8568_______
1300_________________8706_______
1350_________________8792_______
1400_________________8893_______
1420_________________8908_______
1440_________________8945_______

So, the memory can make a big difference, after all. 500 point spread from 1200 to 1440.
 
BTW, I did some testing on the memory timings. I tried to to find all the settings that would tighten the timings but not affect the OC on the memory.

Testing results:


_______Stock____Mod
1350___8792_____8920
1440___8945_____9058

Here is the spec and changes on the memory:

Samsung GDDR3 1.6 Specification

K4J55323QF-GC16 / K4J55323QG-BC16



________SPEC__Change_________________________________________

tRC______27_____25_____Row cycle time(min) - operation (tCK)
tRFC_____34_____32_____Row cycle time(min) - Auto Refresh (tCK)
tRASmin__19_____17_____Row active minimum time (tCK)
tRP_______8______7_____Row precharge time(min) (tCK)
tRCDRD___ 9______8_____Ras to cas delay(min) for Read (tCK)
tRCDWR___5______5_____Ras to cas delay(min) for Write (tCK)
tRRD______7______6_____Row to row delay(min) (tCK)
tGR_______2____________Gapless 2 tCK
tRTW_____12___________Read to Write at same bank - CL=8tCK, tCDLR=4tCK
tRASmax__100000________Row active maximum time (tCK)
tRCDRD____9____________Ras to cas delay(min) for Read (tCK)
tRCDWR___5_____________Ras to cas delay(min) for Write (tCK)
tWR______5_____________Last data in Row precharge (7 tCK)
tCDLR_____4____________Last data in to Read delay (6 tCK)
tCDLW____0____________ Last data in to Write delay (0 tCK)
tCCD______2____________Column address to column address delay (3 tCK)
tCKmin____1.6___________Clock minimum cycle time (ns) - CL=8
tCKmax____6____________Clock maximun cycle time (ns) - CL=8

Register timings on the 7800 GTX (default is timing set 7)

0813211B

0A01060A

20270509

The new settings register values:

07112019

0A01060A

20260508
 
You can get Rev 4 of the mod BIOS I am currently using at:

http://www.xtremesystems.org/forums/showthread.php?p=1082715#post1082715

This will work on any reference 7800 GTX. I have tested this thoroughly on a number of GTX's; XFX, BFG and eVGA. It is only the BIOS file. You should make a backup of your current BIOS before flashing.

FYI, the command line is nvflash -j -4 -5 -6 h20-bios.rom FYI, that is a zero, not a capital "O" in theH20 part of the name.
 
Digital Viper-X- said:
Dell
7800GTX With Quadro HS
77.77
stock 430/1200
coolits
522/1440
idle ~ 50
load ~ low 60s
cooling : stock
ambient = COLD! =p
Click to expand...

My second HDD crashed, and it had the excel file. I am recreating it right now. Should be updated for you by the weekend, in case you thought I was ignoring your result ;)
 
HeavyH20 said:
You can get Rev 4 of the mod BIOS I am currently using at:

http://www.xtremesystems.org/forums/showthread.php?p=1082715#post1082715

This will work on any reference 7800 GTX. I have tested this thoroughly on a number of GTX's; XFX, BFG and eVGA. It is only the BIOS file. You should make a backup of your current BIOS before flashing.

FYI, the command line is nvflash -j -4 -5 -6 h20-bios.rom FYI, that is a zero, not a capital "O" in theH20 part of the name.
Click to expand...

Ooh, looks interesting. What kind of perf increase could I expect in say...BF2 or Farcry?
 
Make: XFX
Model: 7800 GTX
Driver: 78.01
Bios: 5.70.02.11.17
Stock clocks: core / mem 490/1300
Coolbits Detect: OC core / OC mem 515/1350
Usable OC: OC core / OC mem 526/1400
Idle temp: 46C
Cooling method: stock
 
Jodiuh said:
Ooh, looks interesting. What kind of perf increase could I expect in say...BF2 or Farcry?
Click to expand...

Well, the biggest difference has been on the minimum frame rates. The card has a little more horsepower, so you can power through the busy scenes a bit better. On mine, that was around a 10 % improvement. So, if your min frame rate was 40fps, it is would now be 44 fps.
 
I've got a puzzler.

I've been running my Evga 7800 gtx at 516/ 1375 for quite some time with no problems so I decided to try setting those setting in my bios. I used Nibitor 2.5 to save and alter my bios then used NVflash 5.13 to flash the new bios. Well lo and behold suddenly I get lots of artifacts at these new bios settings and I'm forced to lower core to 486 to get stable. Rivatuner shows new bios setting is running at the same speed as my previous overclock, but it has many artifacts. I flash back to my original bios speeds and all is back to normal, I OC fine at 516/1375, stable no artifacts.

So any thoughts on what is happening?
 
Hmm, are you changing anything else other than the clocks? And, is it the latest version of NiBiToR, 2.5?
 
Only changes were 1. core change from 450 to 513 and 2. memory from 600 to 688. Used NiBiTor v2.5 to alter backup of original firmware.

Only thing I can imagine is that rivatuner is somehow misreading the real speeds and they are actually higher after the bios change than indicated. But if that is so then the framerates don't show it.
 
Autochthon said:
Only changes were 1. core change from 450 to 513 and 2. memory from 600 to 688. Used NiBiTor v2.5 to alter backup of original firmware.

Only thing I can imagine is that rivatuner is somehow misreading the real speeds and they are actually higher after the bios change than indicated. Bu tif that is so then the framerates don't show it.
Click to expand...

Do not put the memory via the BIOS past 1350. Heats up too much while in 2D. That is probably the culprit. The 3D clock is only engaged upon entry to the 3D app. Memory is all the time. And, you might want to put some heatsinks on the back side. It really helps. Got me 40 Mhz on the mem clocks.


videocard21on.jpg
 
HeavyH20 said:
Do not put the memory via the BIOS past 1350. Heats up too much while in 2D. That is probably the culprit. The 3D clock is only engaged upon entry to the 3D app. Memory is all the time. And, you might want to put some heatsinks on the back side. It really helps. Got me 40 Mhz on the mem clocks.
Click to expand...
That's not it. I had only raised 3d Perf. profile memory to 688 the other two remained stock. Besides, lowering memory after the fact didn't seem to help, only lowering core to 486 stopped the artifacts. Heatsinks might help but it doesn't explain what is happening to cause this apparent inconsistency. I may have a some odd driver issue. I didn't reload my drivers as recommended because the only change was clock speed, not ID, perhaps I've something floating around in the registry that cause false values for my core clocks? I'll have to experiment.
 
Digital Viper-X- said:
Dell
7800GTX With Quadro HS
77.77
stock 430/1200
coolits
522/1440
idle ~ 50
load ~ low 60s
cooling : stock
ambient = COLD! =p
Click to expand...

That is looking to be very good card !
 
CoolBits detected my optimal o/c to be 505/1300 :cool: ...hmmm. Runs great! Guess AOpen has a stout entry in the market.
 
Well I guess I'll give up for now. Unless someone else shows similar problems I have nothing to compare to. Altering my bios from it's factory setting results in reduced core stability and after 3 days of trying various bios speeds I can't come up with a reason why. Anyone who has similar issues and comes up with a rational please let me know. For now I'll just stay with Stock bios and OC.
 
Autochthon said:
Well I guess I'll give up for now. Unless someone else shows similar problems I have nothing to compare to. Altering my bios from it's factory setting results in reduced core stability and after 3 days of trying various bios speeds I can't come up with a reason why. Anyone who has similar issues and comes up with a rational please let me know. For now I'll just stay with Stock bios and OC.
Click to expand...

I tried the replicate your problem without success. I created a BIOS that ran my core at 530 and memory at 715(1430) and saw no differences. Not sure what is going on with your setup.
 
Make: Leadtek
Model: 7800 GTX
Driver: 81.84
Stock clocks: core / mem 450/1250 (updated bios)
Coolbits Detect: OC core / OC mem 490/1320
Usable OC: OC core / OC mem 499/1420
Idle temp: 46C Ambient temp unknown
Cooling method: stock
 
List is updated. I have not seen many Leadtek cards. I have one of the 7800 GTX MyVIVO Extreme cards on the way with the Quadro heatsink. I am curious what that will do for an OC with a 490/1250 stock clock.
 
Make: BFG
Model: 7800 GTX OC
Driver: 81.85
BIOS rev: 5.70.02.11.25
Stock clocks: 460 / 1300
Coolbits Detect: ???????
Usable OC: 540 / 1350
Idle temp: 38*C
Cooling method: Danger Den Maze 4

Hoobie :)
 
Here's a fun story. And a lesson you can all learn from my follies. :(

Late July 4am - Jod puts tiny amount of AS5 on G70 core.
Early September - Jod notices higher than normal temps, but chalks it up to "using TSAA."
Late October 2am - Jod "finally" succumbs to the reality that it might not have been enough.
Late October 4am - Jod pulls out card and gasps at "browning" AS5 :eek:

Below are the results of a Jod gone wrong. I ran through F.E.A.R. with Max detail and TSAA for about 10mins. Much effort was made to blow as much up as possible.

Before
Before1.jpg


After
After1.jpg


Moral ~ Don't be a Jod. Check your contact.
Benefit ~ Hey F.E.A.R. doesn't crash anymore!!
 
hoobie7 said:
Make: BFG
Model: 7800 GTX OC
Driver: 81.85
BIOS rev: 5.70.02.11.25
Stock clocks: 460 / 1300
Coolbits Detect: ???????
Usable OC: 540 / 1350
Idle temp: 38*C
Cooling method: Danger Den Maze 4

Hoobie :)
Click to expand...


Nice card. I got a second card for SLI, so I thought I would try out the Leadtek WinFast PX7800 GTX TDH Extreme (type that three times). Well, the core is awesome, with a 550 aircooled max and an idle temp of 37C (yes, on air). The memory is the weak part. 1330 max, so far. But, it was spec'd at 1250 for the card. I now have it watercooled, and it now idles 5C below my BFG. So, a 32C idle. Wow.
 
bubblethumper said:
My card has been fubar'd. Probably me manhandling it. :(

New GTX (also a BFG) is going off to VJ tomorrow.
Click to expand...

Ouch. I recall that the cores do not live long past 1.5V. I you are looking at about a year of use with the volt mod. I got 11 months out of my 6800 UEE that was VJ volt modded. Kind of like a race car. Not suited for every day use, but when you do use it ;)

Well, good luck on the next card!
 
Supposedly the GTX's don't have problems with being volt modded like the 6800s. I'm 99% sure I fubar'd it myself
 
Can we do the 78 mod without sodder? Or is this my chance to learn a new skill?
 
Jodiuh said:
Can we do the 78 mod without sodder? Or is this my chance to learn a new skill?
Click to expand...


It is a soldering skills event to mod the 7800. ViperJohn does this and a little more. Custom water block, fans, heatsinks, etc. to support the new voltages and resulting heat.
 
Make: eVGA
Model: 7800 GT CO
Driver:81.85
BIOS rev: 02
Stock clocks: core / mem 470/1100
Coolbits Detect: OC core / OC mem 470/1100 (Coolbits sucked with my card for some reason)
Usable OC: OC core / OC mem 489/1252 w/ manual testing, artifact free and stable...
Idle temp: 36-38C
Cooling method: NV Silencer 5 Rev 3
 
Make: EVGA
Model: 7800 GTX
Driver: 81.87
Stock clocks: core / mem 450/1200
Coolbits Detect: 500 / 1300
Usable OC: OC core / OC mem 515/1380 (modded BIOS, no geo delta, all cores equal)
Idle temp: 42C (Room temp)
Cooling method: A64 FAN
 
BFG 7800GT O/C
Bios 5.70.02.13.07
Driver 81.87 Beta
Coolbits O/C 463 core/ 1.12 Memory
Idle Temp 44 C
Full load Temp 66 C after 30minutes of RTHDRIBL 1.2
Cooling Stock BFG
 
I wonder when people with 512MB GTX's will chime in and report there overclocks..
I'll do so when I get my XFX by thrusday
 
Roliath said:
I wonder when people with 512MB GTX's will chime in and report there overclocks..
I'll do so when I get my XFX by thrusday
Click to expand...

Note to self: Unsubscribe from thread before thursday.
 
Make: eVGA
Model: 2x7800 GTX KO
Driver: 81.94
BIOS rev: 5.70.02.11.01
Stock clocks: 490/1.30
Coolbits Detect: 505/1.32
Usable OC: 505/1.32
Idle temp: 42C
Cooling method: Stock
 
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