The Radeon X800 XL core is built on IBM's 0.11 micron manufacturing
technology and the core contains approximately 160 million transistors. As you've
probably noticed, the X800 XL uses a slightly smaller manufacturing process than the
X850 (0.13 low-K), but ATi has always experimented with new technology on its lower-end
The X800 XL
core is clocked at 400 MHz, and has 16 rendering pipelines. The card is also backed up by
2ns Samsung memory which is clocked at a full 1 GHz using a 256-bit
memory controller. That means the X800 XL VPU is basically the X850 but slightly smaller and
running a bit slower. Let's see if overclocking brings it to the same
Overclocking the beauty!
it comes to overclocking ATI Radeon-based videocards, I
feel that PCStats has had its best luck when dealing with 'official' built-by-ATi cards. We'll see if
this holds true with the ATI X800 XL.
By default the X800 XL VPU is clocked at 398 MHz while the memory hums a long
at 984 MHz, slightly lower than ATi's official 1 GHz rating.
Starting with the core, we raised the clock speed only a few MHz at a time
since our last overclocking attempt with the Gigabyte GV-RX80L256V
did not go very far. We easily passed the 421 MHz mark, the speed
at which our other X800 XL videocard topped out, and continued upwards. We hit a strange
issue at 442 MHz, where the ATI Radeon X800 XL started to show major checkerboard type
artifacts. Oddly, at 441 MHz, the card was perfectly stable. A 10% core overclock isn't too
shabby to start with though.
The first thing we did was set
the memory to run at a full 1 GHz and it had absolutely no problems running
at that frequency. Playing nicely, we then raised the memory speed in 4 MHz
intervals and 1.01, 1.02 and 1.10
GHz fell by the wayside. The maximum speed we got the memory to was 1.11 GHz,
very good for an ATi Radeon X800 XL class videocard!
The core and memory played nicely together and we could run both at their maximum overclocked
speeds without issue. Considering the ATi Radeon X800 XL we tested is a
retail version, the cards currently on the market should be quite good at overclocking too.
|PCStats Test System Specs:|
amd athlon64 4000+
||12 x 200 mhz = 2.4 ghz|
dfi lanparty nf4 sli-dr (nf4-sli)
gigabyte ga-k8nsnxp-939 (nf3
powercolor x700 pro
powercolor bravo x700
albatron trinity geforce 6600gt agp
albatron trinity pc6600
gigabyte gv-3d1 (single mode)
gv-3d1 (sli mode)
msi nx6600gt-td128e (single mode)
nx6600gt-td128e (sli mode)
ati radeon x800 xl
2x 512mb mushkin pc3200 l2 v2
||74gb wd raptor 10k rpm sata hdd|
||aopen 52x combo|
||seasonic super tornado 400w|
windowsxp build 2600
x2 the threat
aa test, af and aa+af test
the agp and
pci-e systems use a different motherboard but results are shown for reference.
unfortunately there are no aquamark3 numbers for this review,
we could not get the benchmark working.